Mason Plumbing
Company Overview
Mason Plumbing, Inc., recognized as Diamond Certified and Health & Safety Qualified, excels in providing exceptional customer service and professionalism. Our Diamond Certified report online features a detailed list of our service specialties, 100 genuine customer reviews, video profiles, and independent ratings. We provide exceptional services such as: Cleaning of Sewers Drain Cleaning Heater Installation Tankless Water Heaters Toilet Maintenance Garbage Disposals Gas Piping Solutions Sewer Inspection Videos Water Line Installation Comprehensive Plumbing Inspections Water Purification Repairing and Replacing Faucets Earthquake Gas Shut-Off Valves Dishwasher Installation Ice Maker Installation Shower Maintenance Bathtub Repair Pump Services Repiping with Copper Backflow Valves Regulating Pressure Sump Pumps Sewage Ejection Pumps Installing Hose Bibs Gas Line Inspection Repairing Ceiling and Wall Leaks
As a full-service plumbing company, Mason Plumbing, Inc. is committed to delivering quality plumbing at competitive prices. Our expertise spans remodels, new builds, and service work, providing a full spectrum of services from sewer and drain cleaning to pipe repairs and extensive renovations.
Cameron Mason, our President and CEO, hails from San Francisco and has called Marin County home since 1969. Cameron has a strong bond with his community and is committed to serving it. Bringing this commitment to his work, Cameron strives to provide you with dependable, accountable, and high-quality service. Cameron and his team pride themselves on being reliable and accountable. Cameron ensures that his company operates with the utmost honesty, integrity, and professionalism.
Business Services
- Bathtub installation
- Bathtub repair
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal repair
- Gas line installation
- Gas line repair
- Hot water recirculation pump installation
- Hot water recirculation pump repair
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Shower installation
- Shower repair
- Sink installation
- Sink repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
Mon: | 8:00 AM - 5:00 PM |
Tue: | 8:00 AM - 5:00 PM |
Wed: | 8:00 AM - 5:00 PM |
Thu: | 8:00 AM - 5:00 PM |
Fri: | 8:00 AM - 5:00 PM |
Sat: | Closed |
Sun: | Closed |
Recommended Customer Reviews

Knew I had a leak and called Mason Plumbing as I had used them before.
I like that they are a family owned business. Phollip was friendly and scheduled an appointment immediately.
Riley and Liam arrived promptly and diagnosed the problem. Work done quietly and efficiently!
Thank you Mason Plumbing for your professional and prompt response!

Masons came quickly to fix a leaking lavatory cistern. They texted half an hour before coming and arrived on time. They did a thoroughly professional job and left the toilet clean and tidy. I would not hesitate to recommend them.

I'm writing to show my appreciation for the immediate response and continued support rendered by Cameron Mason and his crew from Mason Plumbing on January 11, 2023.
In the midst of one of our rain storms my sub basement was flooding. I contacted Mason Plumbing for an emergency repair at 4:30pm. Cameron called soon thereafter, found a sump pump, and arrived at my house within 15 minutes. My 2 sump pumps were both inoperative and the water heater had failed from the flooding caused by the rising waters. This timely response saved the basement from further flooding. Cameron returned the next day and replaced the 2nd sump pump and his crew returned the next day to replace the water heater.
The immediate response and follow up by Cameron was above and beyond the call of duty! I would enthusiastically recommend Mason Plumbing without hesitation! He and his crew were professional in every way and in my experience quite out of the ordinary.

Great service from Mason. On time, told me what was going on every step of the way. Cleaned up when done and happy with the result!

We had an emergency as a pipe in the ceiling started leaking. It was so hard to get a plumber to call us back, much less have time to stop the leak.
Mason plumbing was booked out but squeezed us in and did a great job at a fair price.

I called Mason to repair a leaky faucet. A day after they did, I had a cracked sink. Telling this to Cameron his first reaction was to ask if I had dropped something on my sink,,My paperwork shows a small existing crack that silicone was used to fix. At no time during the repair or after was I told that my sink might crack. No apology from Cameron at any point of this process.
Cameron's only solution was that I buy a whole new vanity countertop and sink at my cost. Very reluctantly i got Cameron to look at the damage but not before he said he had 30 years of experience and knew what he was working with. He confirmed only solution was for me to. buy countertop and sink
I am so glad I DID NOT TAKE HIS ADVICE. because he was proven wrong. I found a plumber to successfully just replace my sink at cost thousands of dollars less than if I listened to Cameron.

As good as it gets! Called and left message and then emailed for work to be done. Received a call back the following morning, set up time for estimate that worked within my schedule. Told me if I accepted the estimate (not a high pressure sale's call) it would be ~2 or 3 weeks to begin. The day after his team received the signed estimate, which was very competitive and much less than some other big Marin names, we received a start state. He showed up with his team on-time, we had a pre-implementation walk through. His team completed the job, and did a post-construction walk through guiding me through what they did and was patient and willing with my questions. Subsequently, I had a pipe break, and although he couldn't service that call, he called me back immediately, and gave me 2 references that specialized in emergency plumbing. I find Mason Plumbing, honest, reasonable, and easy to work with.

We have had countless plumbers stop by to address this and that issue and have always been disappointed by their inability to address the most basic things. Mason Plumbing is a notable exception. They were easy to contact and sent one of their guys by within a few hours of our call. Brandon was fantastic...he diagnosed our problems ASAP and fixed them in the spot. They will be my go-to plumber from now on.

This is the most dishonest scamming business I've ever dealt with. I asked them to take a look at my water heater because the pilot light was going out intermittently. They told me they had to get a part to fix it and would be back the next morning. Ben came to put the part in but called another guy for advice. The other guy said the pilot light was going out because it wasn't getting enough air and the burner chamber access needed to be cut larger to allow for that. Without giving me an estimate Ben went to work on the water heater. Twenty minutes later he said it should work for at least another 2 years and gave me a bill for $484.50. A brand new water heater just like mine costs $500 but of course I wasn't told that. Ben wouldn't let me pay with a credit card as advertised on the website because ""it would cost another 3%"". He then had me sign the contract AFTER the work was done. The pilot light assembly (if he actually put a new one in) cost under $50 all over the internet. Ben charged me $194 and $190 in labor for 20 minutes work. Don't use this company. They are a complete ripoff!

The guys that just came out here were horrible. Arrogant. Totally unhelpful.
My mom is in hospice and we needed a faucet fixed. He reluctantly offered to fl the service call saying it was his least favorite thing to do.
Wow.