Independently Rated Highest in Quality
T e n t h
Consecutive Year
Originally Earned:
March 2008
We declare that Best Tree Service HAS QUALIFIED for and continues to meet the Ongoing Research and Rating Requirements for Diamond Certified® status.
Certificate #1315
(510) 747-8986
(925) 386-6983

Gary Gilliam is owner of Best Tree Service.

Best Tree Service has been reshaping Bay Area clients’ landscapes since 1987. Owner Gary Gilliam is a Certified Arborist and considers his trade an art form, with trees as his palette and the landscape as his canvas. He says he uses his decades of industry experience and a natural eye for artistry to enhance trees’ beauty and architecture through meticulous pruning and care. “I enjoy the challenge of repairing wildly overgrown or poorly pruned trees, and I continually amaze clients who never realized how beautiful their trees could look.” 

Mr. Gilliam trims customers’ trees by himself, which keeps his overhead costs low and allows him to pass the savings on to his clients. He’s happy to consult with customers, make recommendations and work to completely transform their treescapes. 

Best Tree Service can also diagnose and treat ailing trees and remove trees and stumps. Its crew members are easygoing and friendly, says Mr. Gilliam. “They show up on time and work quickly, and they take conscientious care to protect any flowers, plants and wildlife on a client’s property.” The company also offers 24-hour emergency tree service. 

Company Philosophy

“I love what I do, and it shows in the enthusiasm with which I approach every job. My goal is to beautify a customer’s property in a way that suits their personality and sense of style; to create a beautiful, peaceful environment that’s a joy to come home and see.” 

Serving the East Bay, Peninsula and Tri-Valley Area

Fine Garden Pruning
Tree Diagnosis & Treatment
Tree & Stump Removal
Tree Trimming
Treescape Consulting

Comparative Summary

Best Tree Service owner Gary Gilliam takes pride in being “an expert in the art of creating beautiful and healthy trees.” As a certified arborist with 25 years’ experience, he can train his skilled eye on a garden or treescape and see its native potential. Mr. Gilliam describes his method as “soaking up the atmosphere” of a house or garden, then incorporating what he...

Frequently Asked Questions

Q: Who does the actual work at Best Tree Service?
A: "With my company, I do the estimating and the pruning, so you get exactly what you want. Often, other tree service companies will come out, do the estimate and go over the nuances of what the client wants. Then they send an entirely different...
Q: Will my house and plants be safe?
A: "Yes. I’m on site for the entire job, and I make sure everything is very conscientiously done."
Q: Do you have a particular specialty?
A: "Our forte is pruning and tree beautification; that’s what we’re most known for. We also diagnose sick trees and perform treatments and tree removal."

Industry Info

Remember, tree surgery is forever.
Many tree services advertise themselves as “certified arborists,” but that’s not necessarily sufficient if the arborist doesn’t actually perform the pruning, says Gary Gilliam of Best Tree Service. The distinction is...
Findings based on statistically reliable research from 250 surveys

Customer Satisfaction

Survey Question: On a scale of 1 to 10 how satisfied were you with the quality you received?
Chart.

Company Credentials

Workers Compensation
Liability Insurance
License Verification
Business Practices
Current Complaint File

Customer Loyalty

Survey Question: If you needed this product or service in the future, would you use this company again?
Chart.
91%
n = 250

Diamond Certified Qualification

Based on 250 customer surveys, we declare
Best Tree Service
has passed all rating steps and has earned
The Diamond Certified Award
No. 1315
Continuously qualified since March 2008.
David Pak
Director of Ratings Research
American Ratings Corporation

Verbatim Survey Responses From Only Verified Customers

Margaret E. Verified Customer Name
"They did the work. We have had a lot of work done on our house and have employed different contractors. Some of the people did not do the work. Best Tree Service did the work. "
Research conducted by American Ratings Corporation. Ratings Methodology

Company Capabilities Table

Best Tree Service
(510) 747-8986
(925) 386-6983
(650) 530-0974
(408) 782-4952
DCID5107906422
DCID9252485077
DCID6503222102
DCID4084379600

Sun – Sat: 7am – 10pm
24-Hour Emergency Service

Serving the East Bay, Peninsula and Tri-Valley Area

Gary Gilliam, Owner
9
ISA Certified Arborist
703538
Liability Insurance, Workers' Compensation
Better Business Bureau, International Society of Aboriculture
1987
Fine Garden Pruning, Tree Diagnosis & Treatment, Tree & Stump Removal, Tree Trimming, Treescape Consulting
25
Alameda Tree Service

Photo & Video Gallery

Survey Responses For

Best Tree Service

Best Tree Service: Average 8.8 out of 10 based on 250 unique customer surveys of customer satisfaction.
Margaret E. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"It made us super happy. They cleaned up afterward, and they did a good job. "

"They did the work. We have had a lot of work done on our house and have employed different contractors. Some of the people did not do the work. Best Tree Service did the work. "

Mark G. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They have the best quality work. "

"Gary did high quality work and was very reliable. "

Gail D. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They just know what they are doing. "

"He came out, trimmed the tree, and knew what he was doing. "

Judy N. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"Gary is a professional and an artist. You feel like he knows what he is doing, and he has a caring flair for it. "

"I liked that I got a sense that Gary really knew what he was doing. He was very knowledgeable about trees, what to do for them, and how to care for them. "

Nathan G. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"Just that they are trustworthy, and they do a great job. "

"I liked their promptness. The person who came out lives by what they charge. There was no up-sell. "

Mark K. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They give good advice and do what you ask them to do. "

"He gave me advice about a tree that was useful. I appreciated that."

Dean H. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They did a good job. They had a good quote. It was good service. "

"That they completed the job on time, cleaned up afterward, and they didn't damage anything. "

Carol C. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I have referred them to many friends. Gary is very knowledgeable about what he does. He's very quick and doesn't waste time with superfluous things. He always cleans up completely, and I have yet not to be 100% satisfied. "

"Gary is a very nice and friendly person. He's very astute at what he does. He does an excellent job. "

Denise B. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"That they were very conscientious about the clean up. We have a very fussy neighbor who was watching every move and they were very careful about cleaning up and leaving things just the way they found them. I appreciated that. "

"They are very efficient, they do what they say, and I feel it was a quality job. "

Lucy B. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I've referred them to neighbors and friends, and they have used them. Gary is an arborist. He knows his business, he knows trees, and he knows the best solution, whether it's trimming or what to do with a deceased tree. He has that background. "

"He's always been honest, his pricing is fair, and he does a good job. I haven't been disappointed yet. He cleans up behind himself. You never have to clean up behind him. "

Lisa B. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I would say that they are good at what they do. They are reliable and honest. "

"I think that they respond quickly when you ask for an estimate, and they don't change the price after they get there. "

Connie S. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"I would tell them, and have told them, that Gary is an artist with trees. He knows what to do and how to do it. He cleans up after himself, and when he's done, the tree looks beautiful. "

"The way the tree looks after Gary is finished, Gary is an artist, and he gets it done. He does it quickly, he's personable, and then he's gone. "

Ann D. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"Thoughtful, clean, and fair"

"They were thoughtful, clean, and fair."

Doug R. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They do the job at the price they quote and when they leave it is nice and clean. They are quick and efficient."

"They do the job right the first time."

Grace G. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They know what they are doing, and they are very professional. I'm so pleased with them. I tell everyone about them."

"They are so professional, and they always do a good job cleaning up. My tree is really huge, and they've made it so beautiful."

Jerry S. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They know what they're doing."

"They did a great job on our trees, and they looked really good afterwards."

Peter Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were responsive, and they did a good job on my tree."

"They were prompt, responsive, and they did quick work. They also did a pretty good job cleaning up."

Leroy H. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"Gary is very honest, and he knows his product and his work."

"Gary's honesty and knowledge, I was very satisfied."

Doug Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"They were thorough."

"Thorough"

Nathan T. Verified Best Tree Service Customer Name
Q1:10 out of 10
Q2:Yes
Q3 & Q4:

"Gary is a very hard worker. "

"They were very focused and got the job done to my satisfaction."