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

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  • 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?

A team of tree service professionals prepare a tree for removal. You'll feel confident choosing among the quality tree service companies listed above because each has been rated Highest in Quality and has earned the Diamond Certified award. For more information on how best to choose and work with tree service companies in San Mateo County, read the following articles. Photo: ArborWorks, Inc. (2014)

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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  • Ameristar

  • Bufftech

  • DoorKing

  • Xcel

  • Bandit

  • Freightliner Trucks

  • Stihl

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
dogwood trees
willow trees
cedar trees
birch trees

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
tree planting
tree limb removal
fruit tree pruning

Broadmoor Village
Daly City
East Palo Alto
El Granada
Emerald Hills
Foster City
Half Moon Bay
La Honda
Loma Mar
Menlo Park
Moss Beach
Palomar Park
Portola Valley
Princeton by the Sea
Redwood City
San Bruno
San Carlos
San Gregorio
San Mateo
Sharp Park
South SF
West Menlo Park


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
Before Hiring Professional Tree Services in San Mateo County

You can choose a Diamond Certified tree service with confidence. However, if you are unable to use a Diamond Certified tree service, you’ll need to conduct your own research.

First, determine the type of tree services you need so you can locate the tree care company that best fits your needs. The types of tree services in San Mateo County may differ by company. Most will offer insect spraying, tree fertilization, tree removal, stump grinding, cabling and bracing, and tree pruning.

Then, you’ll need to decide the professional and personal characteristics you’re looking for. The questions below will help you narrow down what type of tree contractor you want to work with.

  • Do I want a Diamond Certified company that is rated best in quality and backed by the Diamond Certified Guarantee?
  • Have I done research on common tree services and what tree work entails?
  • If I am unable to hire a Diamond Certified tree service, do I have time to thoroughly research tree services (which could save time and money in the long run)?
  • Do I want a tree service in San Mateo County that is expertly qualified and experienced?
  • 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 a well qualified tree service in San Mateo County?
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What To Ask In Person
Inquire in Person Before Hiring San Mateo Tree Contractors

After you conduct phone interviews with tree services, meet in person with the ones you are still considering. Make sure to note the tree contractor or ISA certificated arborist’s answers to your questions. This is especially true if you have a complex tree problem.

Questions to ask a tree service in person:

  • What tree care equipment do you use?
  • Do you use tree spikes (may cause damage)?
  • How experienced are your employees with trees near hazardous electrical wiring?
  • Is clean up included and when will clean up be completed?
  • How long will my tree services will take to complete?
  • Will you do stump grinding after a tree removal?
  • Is there an extra cost for stump grinding service?
  • Will I need to supply water for tree services (potential hidden cost)?
  • Do you offer tree storm damage repair in San Mateo County?
  • Will you have a written contract for my tree care services?
  • What are the contract terms for tree service in San Mateo County?
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  • What To Ask References
    Questions to Ask San Mateo County 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 Mateo 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 close enough, you’ll have to do careful research. If you call references yourself, make sure to ask for the tree company’s 10 most recent customers. This will help avoid a tree service only offering their happiest customers for references.

    Remember though, 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.

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

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

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

    After your final review of tree service companies, make your final selection. When hiring a tree care service in San Mateo County, consider these final questions:

    • Whether for tree pruning, tree bracing, tree removal, or tree trimming for solar enhancement, can you communicate effectively with the tree care company?
    • Has a San Mateo County tree service pressured you into services you do not want?
    • Has a tree service in San Mateo County expressed interest in your long-term tree work needs?
    • 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.)
    • 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?
    • Are they a Diamond Certified tree service in San Mateo County?
    • Do they have any complaints with the Better Business Bureau?
    • Have you contacted the California Contractor’s State Licensing Board (CSLB) to verify their contractor’s license?
    • Have you contacted their insurance company for verification of liability for tree services and also workers’ compensation?
    • If you are confident with your answers to these questions, make the decision to hire a professional tree service company.
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  • How To Work With
    Tips for Working with San Mateo County Tree Services

    Congratulations on selecting the tree service in San Mateo County. Know that in the long term, good tree care will be an investment. Make sure you have everything in writing with detailed descriptions of the tree services to be performed.

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

    What to do After Hiring a San Mateo County Tree Service
    Communicate to the tree service that you must agree to any additional or unforeseen costs prior to completing 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.

    Ensure Tree Services in San Mateo County go as Expected
    Anticipate extra noise while your tree service is completed. Make sure not to get close while they are completing the work, as this could be unsafe. Be sure to ask what is a safe distance to stay away from tree work.

    Do not talk to tree trimmers or service workers if they are in a tree. Wait until they are safely on the ground. Make sure to keep any pets out of the way, and keep your windows and doors closed.

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  • Be a Good Customer
    Ways to Be a Great San Mateo County Tree Company Customer

    It is the tree service’s obligation to put in quality work using the best possible methods. You play an important role in receiving good professional tree services.

    So why would you want to be a good customer? Everyone appreciates a polite customer. Tree care professionals appreciate customers who are straightforward, honest and easy to work with. Having a positive attitude as a customer sets the tone from your end and creates an environment conducive to a good relationship.

    Things will probably go smoother and any troubles may be more easily resolved.

    Here are some simple steps you can take toward being a good customer.

    • Be upfront with the tree service you choose. Let them know 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.
    • When working with your tree service in San Bruno or Redwood City, ask if you should call to check on the progress of your tree work.
    • Be sure they have a phone number where they can reach you while they’re performing tree services.
    • Always return calls to your contractor 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 service company will help, and communication is crucial to having your needs understood. This is especially true if you will need care over the life of your trees. Most tree contractors can make recommendations for future tree services to keep your home beautiful for years to come.

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Check The Work
Check Tree Services Against the Invoice

Always make sure to check everything in your tree service contract was completed to your satisfaction. Compare everything on the invoice to the actual work done.

A complete invoice should include the following:

  • The arborist’s / tree trimming company’s name, address, telephone number, and license number.
  • 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?
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Written Warranties
Written Warranties from Tree Services in San Mateo County

Some tree care contractors and arborists provide guarantees for their services. If your contractor promised you a warranty, they should be willing to provide it in writing.

Written warranty information should include:

  • Your responsibility if you place a warranty claim (i.e., if you have to pay for labor or materials, or if you are required to pay a prorated amount).
  • The tree trimming company’s name and physical address.
  • What products and services are covered. This should also include whether the tree contractor will replace or refurnish your trees or tree care services should you experience problems with your trees.
  • Limitations and exclusions.
  • If the tree service warranties are transferrable to the new owner if you sell your home or property.
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Top 10 Requests
Tree Contractor Services in San Mateo County

The following are common tree care services and tree problems where professional tree companies and certified arborists can assist:

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.

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
If one of your tall trees leans at a noticeable angle, this could be a hazard. Strong winds and storms could easily bend and break the tree. 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.

Tree Fertilization
Trees need good light, pruning, and food to help them achieve a pleasing shape and long lifer. Good preventative tree care 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 Mateo 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 San Mateo County 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 Mateo County.

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.

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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.

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?

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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