Diamond Certified Companies are Rated Highest in Quality and Helpful Expertise.

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Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Tree Service Companies Rated Highest in Quality?

Photo: Horticultural Services, LTD (2013)

ORINDA—You are the customer. If your goal is to choose a tree service that will deliver high customer satisfaction and quality, you’ll feel confident in choosing a Diamond Certified tree maintenance service. Each has been rated Highest in Quality in the most accurate ratings process anywhere. And you’re always backed by the Diamond Certified Performance Guarantee. Here’s why the Diamond Certified ratings and certification process will help you find a top-rated tree service and is unparalleled in its accuracy, rigor and usefulness:

1) Accuracy: All research is performed by live telephone interviews that verify only real customers are surveyed, so you’ll never be fooled by fake reviews.

2) Statistical Reliability: A large random sample of past customers is surveyed on an ongoing basis so the research results you see truly reflect a Diamond Certified company’s top-rated status.

3) Full Disclosure: By clicking the name of a company above you’ll see the exact rating results in charts and read verbatim survey responses as well as researched articles on each qualified company.

4) Guaranteed: Your purchase is backed up with mediation and the Diamond Certified Performance Guarantee, so you can choose with confidence.

Click on the name of a Diamond Certified company above to read ratings results, researched articles and verbatim customer survey responses to help you make an informed decision.

More than 200,000 customers of local companies have been interviewed in live telephone calls, and only companies that score Highest in Quality in customer satisfaction–a 90+ on a 100 scale–as well as pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified program eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

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Alex Llamas is a veteran of the tree service industry and owner of SexyTrees.com, a Diamond Certified company. He can be reached at (707) 931-0935 or by email.

Alex Llamas

diamond certified contributor profile and expert article

Alex Llamas: High Aptitude

By James Florence, Diamond Certified Resource Reporter

ALAMO — When asked how he got involved in tree service, Alex Llamas recounts a unique opportunity that combined his handy aptitude with his love for altitude. “When I was in college, I got a part-time job helping a retired teacher maintain his property, which he had turned into a public park,” he remembers. “He taught me everything he knew about pruning and maintaining trees. Plus, I did a lot of rock climbing back in the day, so climbing trees was just natural for me.”

Despite these influencing factors, Alex didn’t pursue tree service as a career after college—not right away, at least. “In college, I majored in concrete engineering, and after I graduated I got a job as an estimator with a concrete repair company,” he explains. “However, not long into the job, I got laid off. That put a bad taste in my mouth—I didn’t like the idea of being dependent on someone else for employment. That’s why I decided to start my own tree service company. I got a $5,000 loan from my dad, bought liability insurance and printed some business cards. That was in April of 2012, and my business has continued to grow during the last five years.”

Today, as owner of SexyTrees.com, Alex says his favorite part of his job is seeing the long-term results of his work. “Unlike a lot of tree service companies, we always try to do what’s best for the tree when we’re pruning or performing other types of maintenance. When a customer calls us for service again a couple of years later, it’s rewarding to see how the trees have progressed and how healthy they are.”

A resident of Concord, Alex says he appreciates the close-knit character of his longtime hometown. “This is where I grew up, so I have a lot of family and friends here. A lot of times, they ask for advice or help with their trees, so it’s nice to be able to give back in that way. I like being part of this community.”

Outside of work, Alex likes to take advantage of all the Bay Area has to offer. “My wife, Pamela, and I stay pretty active in our free time,” he affirms. “We do a lot of camping in the summer and enjoy checking out different national parks. We also enjoy the city life and going out to restaurants and concerts.” Additionally, Alex likes spending time with family and friends at barbeques and similar get-togethers.

In regard to his professional career, Alex espouses the importance of respect and communication. “Wherever we’re working, I always remind my guys to treat the customer’s property like it was their own,” he says. “I also place a high priority on client communication by making sure we listen to them and understand their needs. I think those two aspects—respect and communication—are the keys to customer satisfaction.”

When asked the first thing he’d do if he were to retire tomorrow, Alex says he’d take his love for altitude to an exotic location. “I would go tree climbing in the jungles of Mexico. There are massive trees there with huge spikes on their trunks, and I’ve always wanted to climb one of them.”

Ask Me Anything!

Q: What kinds of music do you like?
A: I’m very eclectic in my tastes—I go from classic country like Willie Nelson to Mexican corridos and salsa.

Q: Are you an early bird or a night owl?
A: A little bit of both—it depends on the time of year.

Q: What was your favorite toy as a child?
A: A rope. That may sound weird, but a rope is very versatile—you can use it to lasso a cow, climb a tree or whatever.

Q: Do you collect anything?
A: I collect rocks, pine cones and cross-sections of wood.

Q: Who are your favorite comedians?
A: Dave Chappelle, George Lopez and Carlos Mencia.

Read more

Free Tree Services for Fire Prevention


ALAMO — Do you have lots of dry brush and wood piles lying around your property? Are there unkempt, dead or dying trees? These may not seem like a big deal during winter or spring, but come summer, they can… Read more

Deep Watering Your Trees


ALAMO — When a tree looks unhealthy, it’s usually due to stress from a lack of water or nutrients. A simple way to address this problem is to use a deep watering tool. All you need to do is connect a garden… Read more

The Benefits of Mulch for Trees


ALAMO — An easy way to promote the health of the trees on your property is to apply mulch. Mulch offers several benefits: • It insulates the soil, which minimizes sun and wind evaporation following irrigation. • It keeps weeds down,… Read more

Assessing Tree Service Tools


ALAMO — When hiring a tree service company, it’s important to look at the types of tools its technicians use and how they’re maintained. After all, you should expect a professional to use professional tools and techniques to ensure the utmost quality… Read more

Expert Video Tip

Video: Resources For Removing Fire Hazards

Complete Video Transcription:

ALAMO — Alex Llamas: Hey, this is Mezcal. My name is Alex; I'm a certified arborist, and helpful tip of the week is getting ready… Read more

Terry Powell is a 39-year veteran of the tree service industry and owner of Terry’s Tree Service, Inc., a Diamond Certified company. He can be reached at (925) 201-6321 or by email.

Terry Powell

diamond certified contributor profile and expert article

Terry Powell: Early Entrepreneur

By James Florence, Diamond Certified Resource Reporter

LIVERMORE — While many children get their first taste of the vocational realm by performing yard work around their neighborhoods, for Terry Powell, it became a genuine entrepreneurial enterprise. “When I was about seven years old, I started doing chores around my neighborhood to earn money, from mowing lawns and pulling weeds to washing cars and cleaning garages,” he remembers. “Pretty soon, I started advertising my services by putting up flyers, and by the time I was in my early teens, I had about five guys working for me. Later, when I was in high school, I got into tree service. I loved it, and I’ve been doing it ever since.”

Since founding Terry’s Tree Service, Inc. in 1998, Terry has continued to find motivation in the thing that first attracted him to the trade: a love for trees. “I’ve always been an outdoor enthusiast, and I’m very passionate about nature. After all these years, I still get satisfaction from improving the health and beauty of my clients’ trees.”

Residing in Livermore with his wife, Diane, and three of their five children, Terry considers the Bay Area a perfect place to pursue his favorite outdoor activities. “We have a little bit of everything here as far as the landscape is concerned,” he says. “My family and I do a lot of fishing, hiking and camping, so it’s great to have areas like Lake Tahoe and Lake Del Valle so near to us.”

In addition to his professional career, Terry is a full-time family man—a vocation to which he devotes the majority of his free time. “With five kids, three of whom are still at home, life is very full,” he says. “Our family likes to stay active, both with outdoor pursuits and in-town activities like bowling. We also enjoy attending local events such as the Livermore Honey and Wine Festival. Basically, if there’s a crowd, we’re there.”

In regard to a personal philosophy, Terry espouses the importance of living intentionally. “I try to live my life one day at a time,” he affirms. “Life is an adventure, but it’s short, so it’s important to live it to the fullest. The best advice I could give someone is to not dwell on the past or worry about the future, but to just try to stay in the moment.”

When asked what his future retirement might look like, Terry says he’d kick things off by embracing a new hobby. “When I retire, I plan to start skydiving, which is something my wife won’t let me do until the kids are out of school. Another thing I’ve always wanted to do is get an RV and do some more traveling. In addition to seeing a lot of notable sights, it would give me a chance to visit some of my distant friends and family members whom I don’t get a chance to see often.”

Ask Me Anything!

Q: What’s your favorite kind of tree?
A: Oak. I’ve always loved the twisted, freeform shapes of their branches. I especially like the Oak trees here in the Valley, some of which are 400 years old.

Q: Do you prefer fiction or nonfiction books?
A: Nonfiction, because I mainly read books that pertain to my industry.

Q: If you could immediately master a musical instrument, what would you choose?
A: The fiddle—Charlie Daniels is one of my favorite musicians.

Q: What’s your favorite smell?
A: Mountain air.

Q: Do you collect anything?
A: Antique glass bottles. I actually had one of the largest antique bottle collections in the Bay Area until the Loma Prieta earthquake wiped out most of them.

Read more

The Benefits of Proper Tree Maintenance


LIVERMORE — The upkeep of trees on a property is an important yet often overlooked aspect of home maintenance. In addition to having their health periodically assessed by a professional, you should keep your trees well-trimmed via regular pruning and… Read more

Expert Video Tip

Video: Proper Tree Maintenance

Complete Video Transcription:

LIVERMORE — Host, Sarah Rutan: In caring for your landscape, its important to know how to properly prune your trees. Today we’re in Livermore with… Read more

Chris Chapman is a 22-year veteran of the tree service industry and owner of Horticultural Services, LTD, a Diamond Certified company since 2005. He can be reached at (925) 388-6963 or by email.

Chris Chapman

diamond certified contributor profile and expert article

Chris Chapman: Cultivating a Livelihood

By James Florence, Diamond Certified Resource Reporter

ORINDA — Chris Chapman spent much of his childhood working outdoors, and even though he didn’t realize it at the time, he was cultivating a future livelihood all the while. “When I was growing up, my dad used to send me off to different places to work during the summers,” he remembers. “I spent one summer putting up hay and chasing cows in Montana, another working with a big game outfitter in Colorado, and yet another working agriculture in California. During college, I got involved in landscaping and ended up starting my own business. After 10 years, I was looking for a career upgrade, so I got certified as an arborist and have specialized in tree service ever since.”

Today, as owner of Horticultural Services, LTD, Chris says his favorite part of his job is seeing the long-term effects of his work. “I like seeing the gradual changes that take place on the properties we work on. It’s very rewarding to service a distressed tree and then come back a couple of years later to see it healthy and flourishing.”

Originally from Southern California, Chris now resides in Concord with his wife, Gael, and their two children, Jack and Marilyn. When asked what he appreciates most about living and working in the Bay Area, Chris cites the ideal outdoor working conditions. “With the great weather we have, the Bay Area is the best place in the country to do this kind of work…probably one of the best places on the planet, for that matter.”

Outside of work, Chris furthers his outdoor enjoyment with hobbies like gardening and cultivating bonsai trees. He also enjoys hunting, fishing, reading about military history and keeping up with his two older children: Jessica, who lives in San Diego, and Trevor, who is currently attending college.

In regard to his professional career, Chris espouses the importance of honesty. “If I look at a job and it’s apparent that it doesn’t require my level of expertise, I’ll let the client know and refer them elsewhere,” he explains. “I’ll tell them, ‘I can do this for you, but so could a gardener, and you’d get a better price.’ I just prefer to be honest rather than stick my hands in people’s pockets or try to sell them services they don’t need.”

When asked the first thing he’d do if he were to retire tomorrow, Chris says he would get to work on expanding his home garden. “The space is kind of limited where we live, so we’re mainly growing things in containers. If I had some more room, I’d triple the square footage of my garden and get ready for the coming season.”

Ask Me Anything!

Q: Are you a dog person or a cat person?
A: A dog person.

Q: What’s your favorite local restaurant?
A: Rocco’s Ristorante Pizzeria in Walnut Creek.

Q: What’s your favorite thing to do on a rainy day?
A: Read a book.

Q: What’s your favorite book?
A: Besides the Bible, one of my favorites is “Guadalcanal: Starvation Island” by Eric Hammel. It’s a military history book about the United States’ first offensive in the Pacific during World War II. It’s an absolutely fascinating account.

Q: How do you like your eggs?
A: Scrambled.

Read more

Proper Tree Irrigation


ORINDA — Irrigation is crucial for established trees, but in order to be effective, it’s important to follow proper procedure. For example, a common mistake people make with tree irrigation is watering the trunk. Since a tree absorbs water through its… Read more

Expert Video Tip

Video: Proper Tree Irrigation

Complete Video Transcription:

ORINDA — Host, Sarah Rutan: While it’s important to regularly water the trees on your property, it’s equally crucial to use the proper techniques. Today we’re in… Read more




  • Ameristar

  • Bufftech

  • DoorKing

  • Xcel

  • Bandit

  • Freightliner Trucks

  • Stihl

Japanese maple trees
olive trees
ash trees
ornamental trees
flowering trees
cherry trees
dogwood trees
willow trees
cedar trees
birch trees
maple trees
cypress trees
juniper trees
eucalyptus trees
plum trees
magnolia trees
palm trees
pine trees
lemon trees
apple trees
fig trees
oak trees
orange trees
ficus trees

new tree planting
tree limb removal
fruit tree pruning
tree felling
emergency tree services
tree transplanting
tree fertilizing
tree maintenance
tree landscaping services
citrus tree pruning
seasonal tree care
tree stump grinding
tree disease treatment
tree identification
tree pruning
ornamental tree pruning
dead tree removal
tree stump removal
tree pest control services
tree thinning
tree restoration
tree surgery
tree disease diagnosis
tree cutting

Bay Point
Bethel Island
Discovery Bay
El Cerrito
El Sobrante
Hilltop Mall
Los Medanos
North Richmond
Pleasant Hill
Point Richmond
Port Chicago
Port Costa
Rheem Valley
San Pablo
San Ramon
Tara Hills
Vine Hill
Walnut Creek
Walnut Heights
West Pittsburg


American Society of Consulting Arborists (ASCA) (http://www.asca-consultants.org/)
Better Business Bureau (BBB) (http://www.bbb.com/)
California Arborist Association (CAA) (http://www.cal-arb-association.com/)…

American Society of Consulting Arborists (ASCA) (http://www.asca-consultants.org/)
Better Business Bureau (BBB) (http://www.bbb.com/)
California Arborist Association (CAA) (http://www.cal-arb-association.com/)

Contractors State Licensing Board (CSLB) (http://www.cslb.cs.gov/)
International Society of Arboriculture (ISA) (http://www.isa-arbor.com/)
Tree Care Industry Association (TCIA) (http://www.natlarb.com/)
Western Chapter International Society of Arboriculture (WCISA) (http://www.wcisa.net/)

Know What You Want
What to Ask Yourself When Looking for Tree Services in Contra Costa County

So you know you need tree work accomplished, but do you know what type of tree company you want to hire?

There are many professional tree service companies with many different services and professional qualities from which to choose. Ask yourself what kind of business you want rendering your tree services in Contra Costa County.

  • Do I want a Diamond Certified tree company that is rated best in quality and backed by the Diamond Certified Guarantee?
  • Do I want a tree service in Contra Costa County that is well qualified and experienced?
  • Have I done my research on the types of tree services performed and what tree work entails?
  • If I am unable to use a Diamond Certified tree service, am I willing to do research on my own that could be time consuming (but could save time and money in the long run)?
  • Do I have time to check references, verify their licensing, ISA certifications, insurance, and workers’ compensation, as well as check for any complaints against the company?
  • Do I have the right budget for securing tree care from an experienced and qualified professional tree service in Contra Costa County?
  • If you are ready to seek out a local tree company start researching good tree services in Contra Costa County.

Whether you are in Pittsburg, Pleasanton, San Ramon or another city, you can chose with confidence by using a Diamond Certified tree service.

If you are unable to use one of the Diamond Certified tree removal companies, this is where it is most important to conduct your research. The types of tree care services offered in Contra Costa County may differ by company. Typical services include insect spraying, fertilization, tree removal, stump grinding, cabling and bracing, pruning, cavity filling or other tree services.

You will want narrow down the type of tree services you may need, and seek out companies that cater to your specific tree service needs.

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What To Ask In Person
Important Questions When Meeting with Local Tree Care Company Representatives

After your phone interviews of tree services in Contra Costa County, meet with the companies you are considering in person. This is the stage where most tree care services will send a representative to your home to see the trees in question and offer a detailed estimate.

Tree care companies should have very specialized equipment to handle all your tree care needs. They will be able to provide services such as repairing tree damage from storms, as well as view restoration by eliminating tree overgrowth.

Be sure to inform them exactly what you want accomplished from a tree service. Make sure you take notes of the tree contractor or ISA certified arborist’s answers to your questions. This is particularly true if you have more complex tree care needs.

Questions to ask tree care services in person:

  • What kind of tree care equipment do you use?
  • Do you use tree spikes or lifts to climb trees (spikes may harm trees)?
  • How knowledgeable are your employees with working around electrical and other hazardous wiring?
  • Is clean up included? Of what does your tree clean up consist and when will you complete the clean up work?
  • Will I be supplying the water for you to provide tree services (a potential hidden cost  otherwise)?
  • How long do you estimate my tree care services will take until completion?
  • After my tree removal, will you also grind the stump? Is there an additional cost for stump grinding service?
  • Do you provide tree storm damage removal or wind damage repair to trees in Contra Costa County?
  • After seeing the tree services I need, what precisely is included in this price estimate?
  • Will you utilize a written contract for my tree care services?
  • What are the terms of your written contract for tree services in Contra Costa County?
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  • What To Ask References
    Questions to Inquire of References of a Tree Service in Contra Costa County

    It’s best to choose a Diamond Certified tree care service because all certified companies have passed an in-depth ratings process that most other companies can’t pass.

    If you want quality from a tree care service in Contra Costa County, you can have confidence choosing a Diamond Certified company. Diamond Certified reports are available online for all certified companies.

    And you’ll never be fooled by fake reviews. That’s because all research is performed in live telephone interviews of actual customers.

    If you can’t find a Diamond Certified tree care service company within reach, you’ll have to do your research carefully. If you do call references on your own, specifically ask for a list of the company’s 10 most recent customers. This will help avert giving you references of only customers they know were satisfied. If you do, it’s wise to call some references provided by your tree care service.

    Keep in mind, though, that references provided to you by the tree care company are not equal in value to the large random sample of customers surveyed during the Diamond Certified ratings process. That’s because references given to customers from companies are rarely randomly selected from all their customers. So the contractors will likely give you a few customers to call that they know are content.

    Here are some questions you can ask tree service references:

    • What is your total satisfaction level of the service you received from this tree care company?
    • What tree services were provided for you?
    • What reasons were you satisfied or not satisfied with the tree care services you obtained?
    • Do you think you would call this company again for your tree care in Contra Costa County?
    • Were they friendly and professional throughout your interactions with this tree care company?
    • Did they pressure you into any tree care services you did not want?
    • Did they remove trash and debris before they left?
    • Did they make you aware of special accommodations needed prior to completing their work, such as moving vehicles out of their way?
    • Were they easy to work with while they performed tree care services at your home?
    • Did your final price for tree services reflect the original estimate you were given? Why or why not? Were there any hidden costs that on your final invoice?
    Read moreRead less
  • Review Your Options
    Hire a Good Tree Care Company in Contra Costa County

    The Diamond Certified symbol has been awarded to companies that scored Highest in Quality in an accurate ratings process.

    Review your choice of tree services and narrow down which companies seem to best meet your needs.

    If you haven’t yet, verify for yourself their insurance liability, if they are an ISA certified arborist or have other special certifications, and their state contractor’s license. Are they a Diamond Certified company, or if not, do they have any complaints with the CSLB and Better Business Bureau?

    Before deciding on the best tree care service in Contra Costa County for you, it’s important to consider the following questions.

    • Whether you are looking for tree trimming in Danville, tree cabling in Antioch, tree removal in Concord, or tree maintenance in San Ramon, are you able to communicate your needs with the company?
    • Have any Tree Services in Contra Costa County pressured you into tree services you do not need?
    • Would a full-service tree care company be preferred to a part-time tree care service? (A full-service company will likely be better trained and equipped.)
    • Is there a tree service in Contra Costa County that expressed they wish to take care of your tree needs long-term with your best interests in mind?
    • Are you only seeking a fix to an isolated tree problem?
    • Have you verified all insurance and liability (specifically tree service liability) as well as licensing, training, ISA certification, and tree care experience?
    • Have you checked with the Contractor’s State Licensing Board of California (CSLB)?
    • Are they a Diamond Certified tree service? If they are not Diamond Certified, do they have any complaints against them with the Better Business Bureau, CSLB or other consumer protection association or agency?

    If you are confident in the answers to these questions, continue with your final decision to hire a professional tree service.

    Read moreRead less
  • How To Work With
    Hiring the Best Tree Service in Contra Costa County For Your Needs

    Congratulations on selecting a good tree service in Contra Costa County. You can be sure that in the long term, hiring a good tree care company to care for the health of your trees is a wise investment in your home and property.

    Before the company starts the work, make sure you have everything in writing with very detailed descriptions of the tree care work to be performed to help avoid misunderstandings.

    Have the tree contractor give you a start date and estimated time for completion. Ask if tree services will be completed in a few days or if it will be completed in one day. Have them notify you in advance of any additional costs that were unforeseen in your original estimate.
    Now That You’ve Found a Tree Care Company in Contra Costa County
    You got a written estimate based on the tree services you asked to have completed. Of course, unforeseen problems may come up.

    Ask for any changes of cost in writing. Let them know that you must agree to the extra costs prior to completing tree services. Verification of their insurance and workers’ compensation is critical, do not just take their word. You could be held liable for any damages to your home, a neighbor’s home, or any injury to tree care workers.

    Ask if there is an extra charge for travel, and ask for this amount to be given to you in writing.
    Then sign the contract and do a walk-through with the senior contractor overseeing your tree work before it begins.

    Ways to Make Tree Care Work Go Easily
    The following tips can ease the work for your tree care contractors and help the work move along more smoothly for lower costs and better results.

    • Understand there may be extra noise and debris while the tree service completes your work.
    • Make sure not to get close while they are completing the work, as this could be a safety hazard.
    • Ask your tree care professional what is a safe distance to keep from the work being completed.
    • Only talk to a tree care worker when they are safely on the ground.
    • It is important to keep any pets out of the way of tree care work
    • Keep your windows and doors closed as much as possible. This will help avoid dust and debris from tree work getting inside your home.
    Read moreRead less
  • Be a Good Customer
    How Can You Be a Good Contra Costa County Tree Service Customer?

    It’s the tree care company’s responsibility to put in quality work into tree services using the best possible techniques. You also play a big part in the success of your tree care service.

    Why would you want to be a good customer?

    Everyone appreciates a pleasant customer. This is no different for tree care companies.

    Arborists and tree care professionals appreciate customers who are straightforward, honest and easy to work with. Your good customer behavior sets the tone from your end and creates an environment conducive to a good relationship. Things may go smoother and any problems may be more easily resolved.

    Here are some simple steps you can take to be a good customer of a professional tree service in Contra Costa County.

    • Be upfront with the tree care service you choose. Let them know what you want from your tree service, and how they can fulfill your expectations.
    • Before you hire a tree service in Contra Costa County, restate to the tree care representative your understanding of the agreement. Most problems with local professional tree services occur because of a breakdown in communication. By being clear about your expectations and theirs, you can avoid most conflicts.
    • When working with your tree care professional in San Ramon or Walnut Creek, ask if you should call to check on the progress of your tree work.
    • Be sure your contractor has a phone number where they can always reach you while they’re performing tree work in Contra Costa County.
    • When your contractor calls you, always return calls promptly to keep your tree services on schedule.
    • Remember that being polite and keeping a friendly smile will go a long way!
    • Pay for your tree care work promptly.

    Building a good rapport with your tree care service company will help aid in the process, since communication is crucial to having your specific tree care needs understood. This is especially true if you will need care over the life of your trees.

    Ideally you will want to use the same company for tree services once you find a good company. Whether you need tree pruning or tree fertilization, they will get to know your tree needs specifically.

    This way they can make recommendations for future tree work to keep your home beautiful for years to come.

    Read moreRead less
Check The Work
Check Tree Care Work in Contra Costa County Against the Invoice

Always make sure to check that all of the work your tree service in the contract was completed as agreed upon and completed to your satisfaction. If the tree company agreed to do all clean up work after providing tree services, make sure your yard was left clean.

A standard invoice should include the following:

  • It should include the company’s name, address and telephone number, and their license number at minimum.
  • An itemized list of all work performed, and will ideally include specific descriptions of the work done.
  • An itemized cost with a break-down of both labor and materials cost.
  • The invoice should also include the start date, projected completion date or possibly a guaranteed end date. There may be a clause for some delays that are excusable such as inclement weather.
  • If they offer a satisfaction guarantee, has the tree service been completed to your 100% satisfaction?
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Written Warranties
Ask for Written Warranties with Tree Services in Contra Costa County

Some tree services may provide you with a warranty on their tree work.

If you received tree services, did they provide you with a written warranty? What does this written warranty guarantee?

If the Contra Costa County tree service planted trees or performed tree pruning and maintenance, do they guarantee anything regarding to the health of your trees? Always make sure you understand the terms of any tree service warranty if one is provided.

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Top 10 Requests
Tree Care Service Requests

Here are some common tree care services and common problems where ISA Certified Arborists can assist:

Bracing and Cabling
Helps to provide extra support to strengthen a tree that may be weak and have limbs that may break. Without correcting a specific tree weakness, you may risk injury or property damage. This is especially problematic when there are storms.

Dead Branches in Trees
A common tree issue which should be removed to increase tree health. This will also avoid property damage and injury, as dead branches are more susceptible to storm damage. You don’t want a dead tree limb or dead tree branch to fall on a car, break a window, or cause other structural damage.

Diseases in Trees
Often times tree disease is the result of a deficiency of nutrition in trees. Tree disease can range from leaf discoloration, to excess bark peeling, to insect infestations.

Leaning Tree Repair
Your tall tree leans at a noticeable angle. This could be a hazard if there are strong winds during storms. Leaning trees should be corrected by a professional tree service to avoid property damage or personal injuries.

Mushroom or Fungus Growth
This can happen around the base of the tree, which is a sign of tree decay. There is rotting wood in roots of trees, which means your tree is dying. A well trained arborist can assess your tree and recommend a solution.

Preventative Tree Care
Trees need proper light, pruning, and food to help it achieve a pleasing tree shape and to live longer. This includes tree fertilizers, which will increase the health and nutrition of your trees. There are both organic and conventional fertilizers for trees that your Contra Costa County tree service can provide.

Raised Earth Around Base Of Tree
This can mean your tree is beginning to uproot from the ground. This could be dangerous if a strong storm came through to further uproot your tree. Many of us have seen photos of a tree that crashed on a vehicle or a tree that fell on a house.

Solar Enhancement Services
Solar enhancement completed by professional arborists in Contra Costa County will ensure there is sufficient light for solar panels to function adequately. If your home has solar panels in Concord, you will see improved solar functionality by reducing the amount of shade from trees.

Tree Planting
Perhaps you wish to plant Ambrosia Pomegranate trees, citrus trees, Japanese maples or decorative trees. Either way, consulting a professional tree service will assist you with tree planting.

View Restoration
This can include tree thinning, which creates beautiful filtered views by removing dead wood on trees. They may also perform “windowing” which creates additional open space, similar to a window’s function in your home.

Top Tools for Tree Care Services in Contra Costa County
Your Contra Costa County tree care professional may use a number of different products and tools to care for your trees.

Here are a few things to expect they may use when performing tree care services.

Climbing Rope
These should meet all ANSI safety standards, and will assist a professional arborist with safely climbing trees.

Miracle-Gro Tree Fertilizing Products
Fertilizer and other products from this brand may be used in caring for your trees.

STIHL Professional Chainsaws
STIHL professional chainsaws can be used by a Contra Costa County tree service to trim trees, clear utility line areas, or for other tree shaping and tree pruning.

Electric Pole Chainsaw
These are used as an alternate way for trimming trees. Instead of climbing a ladder to the top of your tree, chainsaw in hand

Rigging Line
Not to be confused with a climbing rope, this assists tree stability by connecting them to stationary objects.

Tree Cabling Tools
This is a very specialized tree service skill, which requires the use of eye lags, extra strength cable, and bracing equipment such as a course threaded rod.

Tree Saver Straps
These should be used when a tree rigging line is put into place. They will help avoid damage to bark while tree work is being performed.

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Glossary Of Terms
Glossary of Tree Care Terms

Following are some common terms used in the tree service industry. This will help you when talking to a local arborist or tree service who is using industry terms you may not know.

ANSI 3000
American National Standards Institute, the national organization that sets standards for tree trimmers, tree services and arborists.

ANSI Z133.1
American National Standards Institute safety standard for tree care.

A chemical that is applied to cut back water loss through stems and leaves on trees.

Also known as antidesiccants

The cultivation and management of trees which focuses on the health and safety of trees.

Also known as: Arboriculture

Refilling a hole around the roots with dirt, often happens during transplanting.

The protective outer layer on trunks, branches and twigs.

Creating extra support for a tree with structural defects by limiting movement of tree branches using steel cables, wire rods, and clamps.

The division of a stem, or a secondary stem, attached to a primary part of the tree.

The use of a ¼ inc threaded steel, used to support cracked, splitting, or debilitated joints of a tree.

buttress root
A large root that forms at ground level of a tree.

A method of structural support for weak tree joints. An extra strength cable is used to support the tree. There is a hole drilled into each main branch, into which a two eye-bolts are used to help keep a tree from splitting apart. Often preferable to bracing or used in conjunction with tree bracing.

The top or crown of a tree, which is formed by all the branches and leaves together.

canopy raising
Used to assist in creating a symmetrical tree by taking away lower lateral limbs.

All branches and foliage of a tree above the ground

crown thinning
Removing selected tree branches in order to facilitate sunlight penetration and reducing weight of strained branches.

crown restoration
Used to renew health and structure to a damaged tree

Removal of dying, diseased, or already dead branches.

Trees or shrubs that shed their leaves seasonally.

drop cut
A second cut in a three-cut procedure of take away a branch.

eye lags
Screws thread eye bolts used in cabling and bracing.

Also known as: eye bolts

A tree or other plant’s ability to tolerate cold or warm temperatures.

lateral root
A root that extends off of the main root.

Having the legal responsibility for financial costs related with cost to repair casualty.

mature tree
A tree that has reached about 3/4 of its full growth.

pesticide (conventional)
Created for destroying or repelling a pest. Synthetic or man-made chemicals. Can be damaging to the soil.

pesticide (organic)
Less refined, naturally occurring products that often contain natural resistance to insects and other pests. Generally less harmful to people and the environment.

plant health care
A tree maintenance system that aims to be preventative or proactive in tree care. Includes fertilization, protection from tree diseases or tree infestation troubles, and ensuring satisfactory water and soil conditions.

Also known as: tree maintenance

stump grinding
A power tool with high-speed disk that rotates in order to chip a stump into smaller pieces for removal.

Also known as: stump cutter

tree pruning
Removing certain branches, roots, or buds of a tree. Used to maintain or improve health of trees, improving flower or fruit output, and helping them become more aesthetically pleasing.

Also known as: tree trimming

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Frequently Asked Questions
FAQ About Tree Care Services

Q: Why Choose a Diamond Certified tree service?
A: Diamond Certified helps you choose a tree service with confidence by offering a list of top-rated local companies who have passed the country’s most in-depth rating process. Only local tree services rated Highest in Quality earn the prestigious Diamond Certified award. Most companies can’t pass the ratings. American Ratings Corporation also monitors every Diamond Certified company with ongoing research and ratings. And your purchase is backed by the Diamond Certified Performance Guarantee. So you’ll feel confident choosing a Diamond Certified tree contractor

Q: Why should I commit extra effort into tree care?
A: Trees have long been valued for their aesthetically pleasing qualities, which in turn can increase the value of your home. Trees can increase your home’s worth by up to 25%, depending on placement, health, size of trees, and variety. You should protect your trees with proper tree care services.

Q: Do I really need to water trees?
A: For the most part, trees need to be watered more often when they are young and growing. However, this changes if you are having drought conditions in your area. With normal rainfall levels, the main exception to this would be trees that were not suitable for your local environment.

Q: What does pruning do for trees?
A: It helps your trees stay healthier, especially as young trees grow and mature. It promotes good branch structure, that could otherwise lead to an early death of your tree.

Q: Do arborists prune trees to specific standards?
A: All arborists should follow the “ANSI A300 – part 1 pruning” standard. Ask your tree service if they always use this standard for tree pruning.

Q: What is pruning paint for trees, and is it still needed?
A: This is an out-dated procedure that used to be suggested for sealing cuts on a freshly pruned tree. Research by the US Forest Service has debunked the need for this “wound dressing”, and showed it actually was contrary to the best interests of the trees. You can even harm your trees with too much moisture.

Q: What is the best time of year to prune trees?
A: Most arborists would agree that you can prune most trees at any time it is needed. Although some trees are more likely to need pruning at the turn of different seasons such as summer of fall.

Q: Do I really need to fertilize my trees?
A: Most trees need fertilization at some point in their lives. In the forest, there are natural circumstances such as animal waste, leaves and other plant material falling to the forest floor, and other decomposition that recycles itself. Mulching is one way to help fertilize a tree, but a plant health care program from a certified arborist is best. A certified arborist can make the best determinations based on your local environment and the ground where your trees grow. This will help your trees have the best health.

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