The 20 most active Plumbing contractors in Marin County, CA

Ranked by the number of plumbing permits each contractor pulled in Marin County, CA since February 2026. This is the raw public record — no editorial fluff, no pay-to-play rankings.

Rank	Contractor	Permits Filed	Status
#1	PETER LEVI PLUMBING LLC	7 permits	✓ Active
#2	FAST WATER HEATER COMPANY	5 permits	✓ Active
#3	WATER HEATERS ONLY INC	3 permits	✓ Active
#4	BELLOWS PLUMBING HEATING & AIR INC	2 permits	✓ Active
#5	ERNEST ONGARO & SONS INC	2 permits	✓ Active
#6	DIVINE ELECTRIC INC	2 permits	✓ Active
#7	KELLY PLUMBING & HEATING INC	2 permits	✓ Active
#8	J&A PLUMBING AND ROOTER SERVICE INC	1 permits	✓ Active
#9	JAY'S PLUMBING	1 permits	✓ Active
#10	KC HOME SERVICES	1 permits	✓ Active
#11	MARIN H20 INC	1 permits	✓ Active
#12	MIKE JOHN LOZANO	1 permits	✓ Active
#13	MOORE HOME SERVICES	1 permits	✓ Active
#14	RAPIDFLO INC	1 permits	✓ Active
#15	ANDREW PINO'S PLUMBING	1 permits	✓ Active
#16	WILLIAM GOTELLI PLUMBING INC	1 permits	✓ Active
#17	BATHS FOR LESS LLC	1 permits	✓ Active
#18	DEMAKAS PLUMBING & HEATING INC	1 permits	✓ Active
#19	DENNY'S HOUSE OF PLUMBING INC	1 permits	✓ Active
#20	GAGNE BROTHERS ENTERPRISES INC	1 permits	✓ Active

See every plumbing permit pulled this week

PermitGrab indexes every plumbing permit in Marin County, CA the day it's issued — homeowner names, addresses, and contractor info. Used by competing contractors, suppliers, and property owners researching who's reputable.

See Marin County, CA permits

Why this list matters more than Angi's "Top Pros"

If you're a Marin County, CA homeowner researching a plumbing contractor, the question is which one will actually do the work — not who paid the most for ad placement. Building permits are the most honest signal you can get:

Every entry pulled a real permit. No self-reporting. No "premium membership" rankings. The city issued these.
Permit count is a proxy for trust. Inspectors don't keep approving a contractor's work if the work is bad — they fail it. Repeat permit-pullers have repeatedly passed inspection.
Building-permit data is public record. It can't be gamed by review-buying or pay-to-rank algorithms.

Above is the raw ranking. If you want to see what each contractor is actually working on right now — addresses, permit types, when they pulled the permit — every plumbing permit is on the Marin County, CA permit feed.

For plumbing contractors: how to land on this list

If you run a plumbing business in Marin County, CA and don't see your company name here, it usually means one of two things:

You haven't pulled a permit in the last 180 days under your registered business name.
Your permits are filed under a homeowner's or licensee-individual's name rather than your business — which happens a lot in jurisdictions like Marin County, CA where the city permit system captures the licensee, not the firm.

Both are fixable. PermitGrab is built for the contractors on this list — daily permit alerts in your zip codes, owner phones where available, and a flat $149/mo with no annual contract. See how PermitGrab works for plumbing contractors in Marin County, CA →

Frequently asked

How is this ranking calculated?

We count every plumbing building permit filed in Marin County, CA over the last 180 days, group by contractor business name, and sort descending. No editorial weighting, no paid placements. The raw count is the rank.

Where does the permit data come from?

Marin County, CA's official permit portal. PermitGrab pulls daily — most permits show up within 24-48 hours of issuance. The full underlying records are visible on the Marin County, CA permit feed.

Is this better than Yelp or Angi reviews?

For one question — "is this contractor real and currently doing work?" — yes, by a wide margin. Reviews are great for catching catastrophic bad actors but can be gamed; permits are official-record proof of activity. Use both.

Why is contractor X not on this list?

Either they haven't pulled a permit in the last 180 days under their business name, or their permits filed under a licensee-individual's name instead. Both are common. The full search interface is on the Marin County, CA permit page.

I'm a plumbing contractor — how do I use this?

See who's pulling the most permits in your service area, watch what work they're doing, and use the daily permit feed to spot new jobs in your zip codes the day they're filed. PermitGrab is $149/month for the full Marin County, CA permit feed plus 770+ other US cities.