About Mason Plumbing
Family Owned & Operated Since 2003
A full-service Marin County plumbing company built on honest work and real accountability.
Who We Are
Family Owned Since 2003
Cameron and Kamber Mason started Mason Plumbing in 2003 with a straightforward belief: do excellent work, treat customers right, and stand behind every job. More than 20 years later, nothing has changed. Mason Plumbing is now a second-generation family business, still small by design, and still personally managed by the owners.
Small is the point. At our size, Cameron is involved in every job. There is no revolving door of technicians, no dispatch center, no upsell quotas. You get the same team, the same standards, and a direct line to ownership if anything is not right.
See Our Services
Our Credentials
Why Marin Homeowners Trust Us
Diamond Certified
Rated highest in quality by independent customer surveys for 10 consecutive years. Diamond Certified is the most rigorous quality credential in the Bay Area trades, earned only by companies that pass an extensive verification process and maintain a 4.0 or higher satisfaction rating.
Centrally Located in Marin
Based in San Anselmo, we are minutes from most of Marin County. We stock common parts and maintain supply-house relationships, which often lets us avoid extra return trips for parts.
Licensed, Bonded & Insured
California Contractor License #817803, fully bonded and insured on every job. We back all plumbing installations with a 2-year labor warranty plus factory warranties on company-supplied materials.
The Team
People Who Take It Personally
We hire for attitude as much as skill. Every Mason Plumbing technician understands that they are working in someone’s home, and that quality, cleanliness, and honest communication are not optional. We do not leave until the job is right and the work area is clean.
Our Diamond Certified score of 4.7 across 252 independent customer surveys reflects that standard. A rating like that does not happen by accident. It comes from the same team showing up year after year, doing the same quality of work on every call, large or small.
Marin County’s trusted plumber is one call away.
Family-owned since 2003. Diamond Certified. Licensed, bonded, and insured. Give us a call or send a message.