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Mason Plumbing, Inc.

Plumbing
|
Marin County
Diamond Certified Company Report
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Mason Plumbing, Inc.
252 SURVEYS
  • star image
  • star image
  • star image
  • star image
  • star image
  • Rating
9 CONSECUTIVE YEARS
SINCE JANUARY 2017
CERT 2426

Diamond Certified Ratings Dashboard

252

Verified Customers

Surveyed

Customer Loyalty

Customer Satisfaction

Helpful Expertise

READ ALL 252 SURVEY RESPONSES

Company Credentials

  • Liability Insurance
  • Business Practices
  • Current Complaint File
  • Workers Compensation
  • License Verification
  • Legal & Finance

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  • Survey Responses
  • Diamond Certified Video Player
  • Researched Articles & Profile
  • Capabilities
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Diamond Certified Company Report SUMMARY UPDATE April 2025

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Mason Plumbing, Inc.

Rated Highest in Quality and Helpful Expertise for 9 Consecutive Years.

Quick Summary

  • Diamond Certified since 2017
  • Provides plumbing maintenance and repair services for residential and commercial clients throughout Marin County
  • HealthSafety Qualified (follows the Just Ask / Will Mask best practices)
  • Family-owned and operated since 2003

Top News Updated

COMPANY MILESTONES

Mason Plumbing, Inc. is celebrating its 22nd anniversary in 2025.

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Top Survey Responses

From a recent Diamond Certified Survey Response: “We had an emergency where the water heater in our hair salon stopped working, so my friend referred me to Mason Plumbing. They...

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From a recent Diamond Certified Survey Response: “I would highly recommend them. They picked up the phone, came out quickly and kept the appointment time. The work was professional, they cleaned up and their prices were fair.”

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Trending Projects

Mason Plumbing, Inc. recently completed a toilet repair job at a home in Healdsburg. The customer was having trouble sleeping through the night because of his running toilet, so he...

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Mason Plumbing, Inc.
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Diamond Certified Researched Articles on Mason Plumbing, Inc.

researched article

One of Mason Plumbing’s service vans

Mason Plumbing, Inc. provides a wide range of plumbing maintenance and repair services for residential and commercial clients throughout Marin County. In addition to handling routine work like faucet replacements and toilet repairs, the family-owned and operated company has the training and equipment to clean sewers, perform video pipe inspections, install and repair tankless water heaters, and more.

CEO Cameron Mason says Mason Plumbing’s success can be attributed to a combination of reliability, accountability and customer service. “We’re known for our integrity—we’re fair and honest with our recommendations, we show up when we say we will, and we do what we say we’re going to do. Our customers know that when they call us, they’re going to get our best possible service.”

Mason Plumbing’s small size allows it to take a hands-on approach to each job and prioritize quality control throughout every aspect of its work. “We’ve kept our company smaller so we can continue to provide our customers with a high level of quality,” says Mr. Mason. “We’re able to connect with them on a personal level and make sure they have positive experiences, which they really appreciate.”

“Our goal is to build long-term relationships with our customers, and the best way to do that is to provide them with excellent service that exceeds their expectations. We have a deep connection to the communities we serve, and we’re committed to providing plumbing help whenever it’s needed.”

If you’re planning to install new plumbing appliances or fixtures, consider products that will maximize your water efficiency without sacrificing comfort.
Despite the public pleas for water efficiency, many Bay Area residents are suffering from conservation fatigue after years of low-water conditions. But according to Cameron Mason, CEO of Mason Plumbing, Inc. in San Anselmo, even those who are tired of carefully monitoring their water usage can find solutions that conserve without cramping comfort. “High-efficiency tankless water heaters and recirculating pumps are good examples of new technology that has changed in recent years,” he explains. “Such systems allow homeowners to have instant access to hot water, which can save thousands of gallons of water per household per year.”

Options like high-efficiency toilets, appliances, and fixtures contribute to water savings without sacrificing comfort and convenience. Consider the following information:

·      WaterSense products (labeled by the EPA) help consumers choose water-conscious fixtures that are efficient and still function well. Items like showerheads, toilets, bathroom and kitchen faucets, and toilets have been tested and certified for exceptional performance.
·      Low-flow toilets are improving. Today’s low-flow toilets save up to 2 gallons per flush compared to toilets installed prior to 1993, and they flush better than early versions of water-saving toilets. Look for dual-flush models that allow you to choose the amount of water per flush for even more water savings.
·      Low-flow faucets that restrict flow from 2.2 gallons per minute to 1.5 gallons per minute don’t noticeably use less water, but they can save upward of 700 gallons per year.
·      Aerating showerheads and faucets mix air and water to offer desired water pressure while still using less water. Some manufacturers even offer rain-style, massaging and center-jet showerheads that feel like high-flow fixtures.
·      Sensors and low-flow irrigation systems allow you to water your lawn and preserve curb appeal with less water usage by only watering when your plants need it. Systems that self-detect leaks and other problems can prevent wasted water by warning homeowners about leaks and irrigation system damage.

Maintaining customer satisfaction is a crucial aspect of any business, but it’s even more important for plumbing companies that have earned the prestigious Diamond Certified award. For Mason Plumbing, Inc., keeping customers satisfied comes down to three factors: reliability, accountability and customer service. “We show up when we say we will and do what we say we’re going to do,” affirms CEO Cameron Mason. “By staying committed to serving our community and treating our customers fairly, we’ve been able to set ourselves apart.”

Mason Plumbing has been providing plumbing maintenance and repair services for residential and commercial clients throughout Marin County since 2003. In addition to handling routine work like toilet repairs and faucet replacements, the family-owned and operated company has the in-house capabilities to clean sewers, perform video pipe inspections, install and repair water heaters (including tankless models), and more.

Unlike larger plumbing companies that take an “assembly line” approach to every job in an effort to maximize their workload volume, Mason Plumbing focuses on providing personalized service in order to maintain a high level of quality. “By keeping our company small, we’ve been able to improve the ways we connect with our clients and train our technicians,” says Mr. Mason. “We want to do right by every customer, and the best way to do that is to take a personal, hands-on approach to their job.”

To further differentiate itself from its competition, Mason Plumbing offers a variety of water-saving options to help eco-conscious customers do their part to help the environment. “New products like high-efficiency tankless water heaters and recirculating pumps give homeowners instant access to hot water, which can save hundreds of gallons of water a month,” explains Mr. Mason. “Other options like high-efficiency toilets and appliances add to water savings without sacrificing comfort and convenience.”

Diamond Certified Researched Capabilities on Mason Plumbing, Inc.

Service Area

serving area
Marin County
Serving Marin County, Including Corte Madera, Fairfax, Greenbrae, Kentfield, Larkspur, Mill Valley, Novato, Ross, San Anselmo, San Rafael, Sausalito, Tiburon and Areas of West Marin

Main Services

Plumbing
  • Commercial Plumbing
  • Drain Cleaning
  • Emergency Plumber
  • Gas Pipe Repair
  • Leak Detection
  • Plumbing Services
  • Sewer Pipe
  • Toilet Repair
  • Water Heater Installation
  • Water Heater Repair
  • Water Heater Replacement
  • Water Lines

Additional Services

Plumbing Maintenance & Repair
Sewer & Drain Cleaning
Video Pipe Inspections
Tankless Water Heaters

Company Info

Hours
Mon
08:00 am - 05:00 pm
Tue
08:00 am - 05:00 pm
Wed
08:00 am - 05:00 pm
Thu
08:00 am - 06:00 pm
Fri
08:00 am - 05:00 pm
Sat
Closed
Sun
Closed
Closed
Mon – Fri: 8am – 5pm
Website
Contact
Mason Plumbing, Inc.

Capabilities Table

Company Name
Mason Plumbing, Inc.
Phone Number
DCID Number
DCID4154564554
Managers
Cameron Mason, CEO
Years in Industry
24 (Manager)
# of Employees
9
License
817803
Memberships
Plumbing-Heating-Cooling Contractors Association (PHCC)
Insurance
Liability Insurance,
Workers' Compensation
Founded
2003
Customer Type
Commercial, Residential
Warranties & Guarantees
Factory Warranties on Company-Supplied Materials, 2-Year Labor Warranty on Plumbing Installations
Payment Accepted
american express,
discover,
mastercard,
visa

Certifications & Awards

diamond certified logo

Brands

capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award
capabilities award

Key Factors

Mason Plumbing, Inc. Family Owned
Family Owned
Mason Plumbing, Inc. Residential & Commercial
Residential & Commercial
Mason Plumbing, Inc. Free Estimates
Free Estimates
Mason Plumbing, Inc. Live Phone Call Answers
Live Phone Call Answers
Mason Plumbing, Inc. Diamond Certified Expert Contributor
Diamond Certified Expert Contributor

Select Photos From Mason Plumbing, Inc.

1 of 4Picture of Mason Plumbing's technicians on a recent jobsite - Mason Plumbing, Inc.
Mason Plumbing's technicians on a recent jobsite
Picture of Mason Plumbing's technicians on a recent jobsite - Mason Plumbing, Inc.
Picture of Cameron and Kamber Mason are owners of Mason Plumbing. - Mason Plumbing, Inc.
Picture of CEO Cameron Mason stands next to Mason Plumbing's fleet of service vans. - Mason Plumbing, Inc.
Picture of Mason Plumbing, Inc. - Mason Plumbing, Inc.

Diamond Certified Expert Contributor Advice & Tips

Cameron Mason is a 25-year veteran of the plumbing industry and owner of Mason Plumbing, Inc., a Diamond Certified company. He can be reached at (415) 484-6836 or by email.

Cameron Mason is a 25-year veteran of the plumbing industry and owner of Mason Plumbing, Inc., a Diamond Certified company. He can be reached at (415) 484-6836 or by email.

Cameron Mason: An Unplanned Profession

By James Florence, Diamond Certified Resource Reporter

SAN ANSELMO — When Cameron Mason started plumbing to pay his way through college, he never thought it would become his primary livelihood. “I worked as a plumber while earning my degree in physical therapy,” he explains. “After graduating, I did an internship with a local physical therapist, but eventually I realized it wasn’t for me. I had fond memories of plumbing, so I decided to return to the trade full-time. After comple...

Read Full Article - Cameron Mason: An Unplanned Profession

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Mason Plumbing, Inc. Ratings and Survey Responses

diamondcertified logo
Mason Plumbing, Inc.
252 SURVEYS
  • star image
  • star image
  • star image
  • star image
  • star image
  • Rating
9 CONSECUTIVE YEARS
SINCE JANUARY 2017
CERT 2426

Diamond Certified Ratings Dashboard

Customer Satisfaction

Customer Loyalty

Helpful Expertise

Company Credentials

  • Liability Insurance
  • Business Practices
  • Current Complaint File
  • Workers Compensation
  • License Verification
  • Legal & Finance

Phone Survey Responsesfrom 252 Verified Customers

Richard P.

They're very professional, and theyve done a wonderful job. We are extremely satisfied. If you have any problems, plumbing or contractual problem, call Mason. They'll fix the plumbing and give you a referral if they can't address the contract work.

I asked him about electrical contractors just for a backup in case we have any electrical problems. I hadn't thought about the storm, and he gave me a couple of names and recommended them highly. I like his professionalism. He as a person is very, very congenial and very knowledgeable. He explains everything and does the work himself. He's been here a number of times, and he's been very professional, his staff as well. As far as I'm concerned, they're 100 percent.

Verified Customer of Mason Plumbing, Inc., 1 of 252

10 Quality
Yes Loyalty
Fred H.

I would recommend them to anyone without hesitation.

They are always on time, very competitive in their pricing, and they provide excellent customer service on the phone. I cannot say enough about how much we appreciate their professionalism.

Verified Customer of Mason Plumbing, Inc., 2 of 252

10 Quality
Yes Loyalty
Martin G.

They are very reliable and honest.

They get it done immediately. If it's an emergency, they get it done. I've used them for a long time, and they're first rate.

Verified Customer of Mason Plumbing, Inc., 3 of 252

10 Quality
Yes Loyalty
Shari

We were in a situation in an emergency where our hot water heater stopped working. We are a hair salon and we need our hot water heater, so a friend of mine referred them to me. They were there in 15 to 20 minutes, fixed it and got us up and running right away. If it wasn't for them, we would have had to shut down the salon for the day.

They were very professional, friendly, thorough and just very knowledgeable.

Verified Customer of Mason Plumbing, Inc., 4 of 252

10 Quality
Yes Loyalty
Sandra F.

The guy was right there and he knew exactly what it was. He told me there was no need to descale the water heater, so he unscrewed the water heater and washed it out with water to clean out all of the dirt. There was plenty of water pressure after that, so he knew what he was doing.

They knew what they were doing.

Verified Customer of Mason Plumbing, Inc., 5 of 252

10 Quality
Yes Loyalty
Jeffrey R.

They did prompt good work. I would highly recommend them. They picked up the phone, came out quickly, and kept the appointment time. The work was professional, they cleaned up, and their prices were fair. All of my experiences have been excellent so far.

They did good work. I really liked the quality of the work.

Verified Customer of Mason Plumbing, Inc., 6 of 252

10 Quality
Yes Loyalty
Naomi S.

I had a circumstance where one came and turned my water heater on, but he turned it up so high that it could blow out. I then called Mason Plumbing and he said it would be hard, but he was able to disconnect it and get the connection correct.

That he was able to fix the problem, and he went out of his way.

Verified Customer of Mason Plumbing, Inc., 7 of 252

10 Quality
Yes Loyalty
Alex E.

I have told a few people that they will not gouge you. I had them fix them all of the toilet tanks for all of my toilets and he also did something where he did not do anything unnecessary.

They responded fast and he was there when he said he would be here. He fixed everything.

Verified Customer of Mason Plumbing, Inc., 8 of 252

10 Quality
Yes Loyalty
Craig S.

They were responsive, quick and efficient. They were punctual and they were on time. They tried their best. They were really good, polite and I would recommend that people use them.

When you talk to them, they are polite, and when they said they would be there, they were punctual. They didn't do anything to disappoint us.

Verified Customer of Mason Plumbing, Inc., 9 of 252

10 Quality
Yes Loyalty
John H.

They were super responsive, got my problem taken care of within a day of me calling, and the guy was really helpful and gave me a better understanding of what the problem was.

The way he communicated to me what the problem was, he took pictures and was really transparent.

Verified Customer of Mason Plumbing, Inc., 10 of 252

10 Quality
Yes Loyalty
Craig M.

That I was very satisfied with them, and they made it so I could understand what they were talking about and they explained what they were doing and why they were doing it.

I would ask them why they were doing something and they would give me an excellent response, which was important and the work was fine and the price was reasonable. They were very personable and I met the owner and two of his assistants.

Verified Customer of Mason Plumbing, Inc., 11 of 252

10 Quality
Yes Loyalty
Sarah C.

The last time they were here, they came and they realized they couldn't help us and they didn't charge for the visit. That was really nice, they were honest and helpful.

They were responsive.

Verified Customer of Mason Plumbing, Inc., 12 of 252

10 Quality
Yes Loyalty
Gaetano F.

They're reliable. They did a nice job, and they did what they said they were going to do. They charged what they said they would and did it in a good amount of time.

They did a nice job, and they did what they said they were going to do. They charged what they said they would and did it in a good amount of time.

Verified Customer of Mason Plumbing, Inc., 13 of 252

10 Quality
Yes Loyalty
Sydney P.

I was really impressed with the speed in which they responded to my inquiry and the options given and the explanation of what needed to happen.

They made an overwhelming repair quite simple.

Verified Customer of Mason Plumbing, Inc., 14 of 252

10 Quality
Yes Loyalty
Sara D.

They did my drains, and they were very helpful. They were on time, helpful, and reasonably priced. He was local and didn't have any weird fees.

They were on time, helpful, and reasonably priced. There were no weird fees. I had a very simple problem. He was helpful, gave good advice, and he was clean. He was very responsive over Yelp too.

Verified Customer of Mason Plumbing, Inc., 15 of 252

10 Quality
Yes Loyalty
Susan G.

They are timely and they arrive when they say they will. Cameron gives good bids and if the bid is less, he will bring the price down.

That they are timely, they arrive when they say they will. Cameron gives good bids and if the bid is less, he will bring the price down.

Verified Customer of Mason Plumbing, Inc., 16 of 252

10 Quality
Yes Loyalty
Jeffrey S.

They are very professional, he does an excellent job, but if you need service on the weekends or off hours, they don't work.

They do a competent job.

Verified Customer of Mason Plumbing, Inc., 17 of 252

10 Quality
Yes Loyalty
Gary R.

They are reliable. I called other plumbers before calling them, but Mason Plumbing was the only one that called me back.

Their reliability

Verified Customer of Mason Plumbing, Inc., 18 of 252

10 Quality
Yes Loyalty
Jane H.

They are great plumbers. They get things done. They are orderly, timely, clean, and they know what they are doing.

I've used them for many years. I keep going back to them because I trust their judgement. When I have questions about things I don't know, they answer them. They solved a manufacture's problem. He went above and beyond to get things taken care of.

Verified Customer of Mason Plumbing, Inc., 19 of 252

10 Quality
Yes Loyalty
Valerie B.

We thought that a pump was broken and when it turned out 0t to be, he didn't charge us and he was very honest.

He was very honest.

Verified Customer of Mason Plumbing, Inc., 20 of 252

10 Quality
Yes Loyalty
Serena B.

He got there in the time frame and it was so easy. He didn't want to charge me, but I paid him anyway.

They were on time.

Verified Customer of Mason Plumbing, Inc., 21 of 252

10 Quality
Yes Loyalty
Mia R.

Honest and affordable, they fixed a problem that no one else could fix at a fraction of the cost.

Honest and affordable

Verified Customer of Mason Plumbing, Inc., 22 of 252

10 Quality
Yes Loyalty
Jaco S.

They always come as soon as possible, always on the same day. They are professional and friendly.

Everything combined, they always fix everything, and they dont have to come back. I can rely on them. They always come out the same day. I never have to worry about a problem getting fixed.

Verified Customer of Mason Plumbing, Inc., 23 of 252

10 Quality
Yes Loyalty
Leanne K.

I would highly recommend them for their professionalism, responsiveness and knowledgeable staff.

Reliability

Verified Customer of Mason Plumbing, Inc., 24 of 252

10 Quality
Yes Loyalty
Felice D.

They're reliable and professional. They were excellent. Cameron came himself, and I liked that.

They did the job well, and they finished it quickly. They did a beautiful job.

Verified Customer of Mason Plumbing, Inc., 25 of 252

10 Quality
Yes Loyalty
Harmony S.

I called them, and they were responsive. They fixed my problem on the first go, within an hour.

They were fast and efficient.

Verified Customer of Mason Plumbing, Inc., 26 of 252

10 Quality
Yes Loyalty
Sue S.

They are reliable, fair pricing, excellent work, and quite friendly, especially the owner.

They are reliable, fair pricing, excellent work, and quite friendly, especially the owner.

Verified Customer of Mason Plumbing, Inc., 27 of 252

10 Quality
Yes Loyalty
Ryan M.

I would say, they are responsive and know what they are doing. The pricing isn't too bad.

They knew what to do for the repair.

Verified Customer of Mason Plumbing, Inc., 28 of 252

10 Quality
Yes Loyalty
Leland A.

I tell all my friends to make sure to get an estimate first before hiring Mason Plumbing.

He did a good job.

Verified Customer of Mason Plumbing, Inc., 29 of 252

10 Quality
No Loyalty
Lynn R.

It was very expensive and that is what my hesitation was. They were very helpful though.

He answered a lot of questions.

Verified Customer of Mason Plumbing, Inc., 30 of 252

10 Quality
Yes Loyalty
Kim M.

They are wonderful, responsive, proactive, knowledgeable, courteous and professional.

When I spoke with Cameron, he got me in touch with his scheduling person and they got me the appointment scheduled right away. Cameron himself went out and they got the work done on time. It was a good value and they went above and beyond. They looked for fixtures to replace and they found the exact same one.

Verified Customer of Mason Plumbing, Inc., 31 of 252

10 Quality
Yes Loyalty
Eugene C.

They did top-0tch work and they had a couple of people who performed at a high level.

Competent, clean, reasonable charges, and I have used them for commercial work as well.

Verified Customer of Mason Plumbing, Inc., 32 of 252

10 Quality
Yes Loyalty
Molly R.

He's a nice guy and he is honest. Everyone who works for him is very friendly.

Our kids did scouts together, so I know him personally. He is a nice person.

Verified Customer of Mason Plumbing, Inc., 33 of 252

10 Quality
Yes Loyalty
Susan C.

They were efficient and they got the problem solved and they got the job done.

Just their punctuality and their efficiency and it didn't drag on and on.

Verified Customer of Mason Plumbing, Inc., 34 of 252

10 Quality
Yes Loyalty
Elizabeth S.

They were quick, responsive, and they provided good friendly customer service.

I called with a question, and the owner called me back literally within 5 minutes of my call.

Verified Customer of Mason Plumbing, Inc., 35 of 252

10 Quality
Yes Loyalty
Cynthia C.

They are trustworthy and competitive in price, although, still a little high.

They are genuine and trustworthy.

Verified Customer of Mason Plumbing, Inc., 36 of 252

10 Quality
Yes Loyalty
Mike A.

They were honest, careful and they did the work quickly. They were efficient.

They pointed out the issues that I was not aware of and they fixed them.

Verified Customer of Mason Plumbing, Inc., 37 of 252

10 Quality
Yes Loyalty
Ann R.

They were available and very professional and they know what they are doing.

They were able to come out the next day and get it done in a couple hours.

Verified Customer of Mason Plumbing, Inc., 38 of 252

10 Quality
Yes Loyalty
Renee V.

I would say they were very k0wledgeable and they got the job done quickly.

I would say they are really personable.

Verified Customer of Mason Plumbing, Inc., 39 of 252

10 Quality
Yes Loyalty
Jason P.

They were on time, detailed and they seemed to know what they were doing.

I had multiple jobs and every one of them went as expected.

Verified Customer of Mason Plumbing, Inc., 40 of 252

10 Quality
Yes Loyalty
Stefan C.

They do quality work. They are fast, efficient and pretty affordable.

They were friendly and easy to work with. I had the feeling that they knew what they were doing and he kept me updated.

Verified Customer of Mason Plumbing, Inc., 41 of 252

10 Quality
Yes Loyalty
Bob M.

They were prompt, pleasant, and professional. They got the job done.

They did what they needed to do and there was 0thing wrong with what they did.

Verified Customer of Mason Plumbing, Inc., 42 of 252

10 Quality
Yes Loyalty
Brian L.

They are so knowledgeable, helpful, and they are fair with pricing.

Vast knowledge and willing to educate their customers

Verified Customer of Mason Plumbing, Inc., 43 of 252

10 Quality
Yes Loyalty
Peter J.

I would recommend them and tell them that they are in good hands.

He definitely knew how to solve the problem that we had.

Verified Customer of Mason Plumbing, Inc., 44 of 252

10 Quality
Yes Loyalty
Mara S.

We have told a lot of people about them. They are our first call.

They are a local company, community oriented and that goes a long way with people. Also they are knowledgeable and trustworthy.

Verified Customer of Mason Plumbing, Inc., 45 of 252

10 Quality
Yes Loyalty
David W.

They are great and they are responsive and they take care of you.

Everything

Verified Customer of Mason Plumbing, Inc., 46 of 252

10 Quality
Yes Loyalty
Crystal

Call them, except on the weekends, as they are not available.

Professionalism and they are able to handle difficult plumbing challenges beyond the normal scope of work.

Verified Customer of Mason Plumbing, Inc., 47 of 252

10 Quality
Yes Loyalty
Michael B.

They are reliable, they show up on time, and they do the job.

What I previously said.

Verified Customer of Mason Plumbing, Inc., 48 of 252

10 Quality
Yes Loyalty
Dez D.

They are reliable and respond to requests for work quickly.

They are professional and they have good people working there.

Verified Customer of Mason Plumbing, Inc., 49 of 252

10 Quality
Yes Loyalty
Marley P.

They were dependable, creative and just helpful in general.

I trusted them.

Verified Customer of Mason Plumbing, Inc., 50 of 252

10 Quality
Yes Loyalty