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

  • Why this rating is the most accurate.
  • Our editors gather deep company info.
  • Performance is Guaranteed.

Diamond certified companies are top rated and guaranteed

Why Trust Diamond Certified Tree Service Companies Rated Highest in Quality and Helpful Expertise®?

A team of tree service professionals perform a tree removal. You'll feel confident choosing among the quality tree service companies listed above because each has been rated Highest in Quality and Helpful Expertise® and has earned the Diamond Certified award. For more information on how best to choose and work with tree service companies in San Francisco, read the following articles.

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 and Helpful Expertise® 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 and Helpful Expertise®–a 90+ on a 100 scale–and pass all of the credential-based ratings earn Diamond Certified. By requiring such a high score to qualify, the Diamond Certified Resource eliminates mediocre and poorly performing companies. Read detailed information about the ratings and certification process.

Read moreRead less




  • Ameristar

  • Bufftech

  • DoorKing

  • Xcel

  • Bandit

  • Freightliner Trucks

  • Stihl

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
Japanese maple trees
olive trees
ash trees
ornamental trees
flowering trees
cherry trees

tree stump removal
tree pest control services
tree thinning
tree restoration
tree surgery
tree disease diagnosis
tree cutting
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

Barbary Coast
Bayview District
Bernal Heights
the Castro
Cole Valley
Cow Hollow
Diamond Heights
Duboce Triangle
Eureka Valley
Financial District
Fisherman’s Wharf
Fort Mason
Glen Park
Golden Gate Park
the Haight
Hayes Valley
Hunters Point
Inner Richmond
Inner Sunset
Jackson Square
Laurel Heights
Marina District
Mission District
Nob Hill
Noe Valley
North Beach
Outer Richmond
Outer Sunset
Pacific Heights
Potrero Flats
Potrero Hill
Rincon Hill
Russian Hill
San Francisco
Sea Cliff
South of Market Street (SOMA)
Sunset District
Telegraph Hill
the Tenderloin
the Presidio
Treasure Island
Twin Peaks
Union Square
West Portal
Western Addition


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
Questions to Ask Before Hiring Local Tree Services in San Francisco

You know you need tree services. But since there are many tree companies out there to choose from, you must be diligent in how you hire a tree service.

Ask yourself what kind of business you want performing your tree services in San Francisco.

  • Do I want a Diamond Certified company that is rated best in quality and backed by the Diamond Certified Performance Guarantee?
  • Do I want a tree service in San Francisco that is expertly qualified and experienced?
  • Have I done enough research on tree services and what tree work entails?
  • If I am unable to hire a Diamond Certified tree service, Do I have time for thoroughly researching tree services (which could save time and money in the long run)?
  • Do I have time to check references, confirm licensing, confirm ISA certifications, verify liability insurance and workers’ compensation, as well as check for complaints against the company?
  • Do I have the budget for hiring an experienced and qualified tree service in San Francisco?
  • You can chose with confidence by using a Diamond Certified tree service. If you are unable to use a Diamond Certified tree service, this is where it is critical to conduct your own research.

You will also need to determine the type of tree services you need, and find companies that cater to those  tree care needs.

The types of tree care services offered in San Francisco may differ by company. Most tree care companies offer services such as insect spraying, tree fertilization, tree removal, stump grinding, cabling and bracing, tree pruning, cavity filling among other services.

Read moreRead less
What To Ask In Person
Ask These Questions in Person When Choosing a Local Tree Care Contractor

After your phone interviews with tree companies, meet in person with the companies you are considering. Tree services in San Francisco should be able to offer services such as repairing tree storm damage, view restoration, and reducing tree overgrowth. Be sure to communicate exactly what you want from a tree service.

Make sure to notate the ISA certified arborist’s answers to your questions. This is especially true if you have a complex tree problem. Let the tree service know if you will employ an arborist for the long term.

Whether you are a potential customer for long-term or one-time tree services, each arborist or tree contractor should get to know your needs and recommend the best services.

Questions to ask a tree service in person:

  • What tree care equipment do you use?
  • Do you use tree spikes or lifts to climb trees (remember, spikes may damage trees if used incorrectly)?
  • How experienced are your employees with working around hazardous electrical wiring?
  • Is clean up included and when will clean up be completed?
  • Will I need to supply water for tree services (a potential hidden cost)?
  • How long do you estimate my tree services will take?
  • After a tree removal, will you do stump grinding? Is there an extra cost for stump grinding service?
  • Do you offer tree storm damage repair in San Francisco?
  • Will you have a written contract for my tree care services?
  • What are the contract terms for tree service in San Francisco?
Read moreRead less
  • What To Ask References
    Questions for San Francisco Tree Service References

    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 San Francisco, 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 yourself, make sure to ask for a list of the company’s 10 most recent customers. This will help avoid a tree service only selecting their  happiest customers for references.

    Keep in mind, 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 the tree service favor the company, and are not randomly selected from all their customers. So the tree contractors will likely give you a few customers to call that they know are satisfied.

    Here are some questions you can ask tree service references in San Francisco:

    • What tree services were provided for you?
    • On a scale of 1 to 10, what is your satisfaction level with this tree service?
    • What reasons (if any) were you unsatisfied with the tree service?
    • Would you call this company again for tree services in San Francisco?
    • Were they friendly and professional through all of your encounters?
    • Did they pressure you into tree services you did not want?
    • Did the tree contractors or arborist services remove tree debris before they left?
    • Did they notify you of any accommodations needed before starting tree work (moving vehicles)?
    • Were there any hidden costs on your tree service invoice?
    • Did your final cost reflect the estimate you were given? Why or why not?
    Read moreRead less
  • Review Your Options
    Hire a Good Tree Service or Arborist in San Francisco

    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 make your final selection. If they are not a Diamond Certified company, do they have any complaints with the Contractors State License Board?

    Before hiring a tree care service in San Francisco, consider these additional questions.

    • Whether seeking tree pruning, tree cabling, tree removal, or tree planting, can you communicate your needs with the company?
    • Has a San Francisco tree service pressured you into tree services you do not want?
    • Are you only seeking a fix to an isolated tree problem (no long-term tree service)?
    • Do you want a full-service tree company or a part-time tree service? (A full-service company will likely be better equipped and trained.)
    • Has a tree service in San Francisco expressed interest in your long-term tree work needs?
    • Did you feel they have your best interests in mind?
    • Have you checked Tree Service liability and insurance, as well as licensing, tree care training, ISA certification, and experience?
    • Have you contacted the California Contractor’s State Licensing Board (CSLB)?
    • Are they a Diamond Certified tree care company in San Francisco?
    • If they are not Diamond Certified, do they have any complaints on their state license record?

    If you are reassured with the answers to these questions, make your decision to hire a professional tree service company.

    Read moreRead less
  • How To Work With
    Working With a Residential Tree Service in San Francisco

    Congratulations on selecting the tree care service in San Francisco that’s best for you.

    Know that in the long term, good tree care will be an investment in your home. Make sure you have everything in writing with detailed descriptions of the tree services to be performed.

    This will help avoid misunderstandings. Have them give you a start date and estimated time for completion. Have them notify you in advance of any additional costs that were unforeseen in your original estimate.

    Next Steps After Choosing a San Francisco Tree Service
    You received an estimate based on the tree services you asked to have completed. Of course, unforeseen problems may arise. Ask for any changes to your cost in writing. Tell them you must agree to any additional costs prior to completing tree services.

    If you haven’t already, ask if there is an extra charge for travel to your home. Sign the contract and do a walk-through with the senior contractor before it begins.

    Help Protect Your Tree Trimmer or Arborist
    Understand there may be extra noise while your tree service is completed. Make sure not very get close while they are completing the work, as this could be unsafe.

    Ask your tree care professional what a safe distance is to stay away. Only talk to a tree care worker when they are on the ground.

    Also, make sure to keep any pets out of the way, and keep your windows and doors closed as much as possible.

    Read moreRead less
  • Be a Good Customer
    Being a Good Customer of a San Francisco Tree Service

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

    Familiarizing yourself with local laws on tree services and hiring tree contractors will help you. Why would you want to be a good customer? Everyone appreciates a pleasant customer.

    Tree care professionals appreciate customers who are straightforward, honest and easy to work with. Having positive conduct as a customer 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.

    • Be upfront with the tree service you choose. Let them know what you want and how they can fulfill your expectations.
    • Reiterate your understanding of the agreement for tree services. Most problems with professional tree services occur because of a breakdown in communication. By being clear about expectations, you can avoid most conflicts.
    • When working with your tree service in Bernal Heights or Mission District, 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 reach you while they’re performing tree services.
    • When your contractor calls you, always return calls promptly to keep your tree work 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, since communication is crucial to having your specific needs understood. This is especially true if you will need care over the life of your trees.

    Whether you need tree pruning or tree fertilization, a good arborist service 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 the Tree Care Services Against the Invoice

Always make sure to check that all of your tree services in the contract were completed as agreed upon and to your satisfaction.

If they agreed to clean up, was your yard left clean? Compare everything on the invoice to the work done.

A standard invoice should include the following:

  • The San Francisco arborist or tree trimming company’s name, address, 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.
  • A break-down of cost for both labor and materials.
  • The invoice should ideally include a start date, estimated completion date and 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?
Read moreRead less
Written Warranties
Written Warranties from Tree Services in San Francisco

Some tree services may provide a warranty or satisfaction guarantee. This will vary depending on the company, the services rendered and the original agreement and terms you discussed.

If you hired a local tree company that guarantees their work, did they promise to provide you with a written warranty? If so, what should this written warranty include?

Good warranties usually detail:

  • The tree trimming company/arborists name, physical address and license number
  • An itemized list of what services are covered by the warranty
  • All exclusions and limitations
  • Your responsibility for placing a warranty claim
  • If the warranty is transferable if you sell your home or property where the guaranteed trees are located

Always make sure you understand the terms of any warranty provided before making any final payments or signing work completion forms.

Read moreRead less
Top 10 Requests
Top Tree Care Service Requests

The most popular tree services performed in San Francisco include:

Tree Bracing and Tree 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.

Diagnosing and Treating Tree Diseases
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 Straigtening / Repair
If 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 in Trees
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.

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.

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 overall health and nutrition of your trees. There are many organic and conventional fertilizers for trees that your San Francisco 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 San Francisco will ensure there is sufficient light for solar panels to function adequately. If your home has solar panels in Oakland, you will see improved solar functionality by reducing the amount of shade from trees.

Tree Planting Services
Perhaps you wish to plant decorative trees, fruit trees or citrus trees. Either way, consulting a professional tree service will assist you with tree planting in San Francisco.

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.


Products Used By Local Tree Care Services in San Francisco
Your San Francisco 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 Line or Climbing Rope
These should meet all ANSI safety standards, and will assist a professional arborist with safely climbing trees.

Professional Chainsaws and Other Professional Grade Tree Trimming Equipment
Professional chainsaws can be used by local tree companies 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.

Read moreRead less
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.

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

Read moreRead less
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 that have passed the country’s most in-depth rating process. Only local tree services rated Highest in Quality and Helpful Expertise® 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.

Read moreRead less