Plumbing repair in San Rafael and Marin County
Leaking faucets, running toilets, worn shutoff valves, dripping hose bibs, high water pressure and the rest of the everyday fixes, for homes across Marin County and southern Sonoma County. Every repair is flat rate and quoted before we start, and the diagnostic visit is $69. No job is too small to call about. California C36 license #1090862.
- Plumbing in Marin County since 2017
- California C36 plumbing license #1090862
- 5.0 stars from 89 reviews, as of October 2026
What's included
Included in every repair
- Diagnosis of the problem and what's causing it
- A free water pressure check
- One flat price before we start, and that's what you pay
- Parts from a plumbing supply house, not a big box store
- Everything inside the wall supplied by us, so we can stand behind it
- A full test before we leave
Priced separately
- Fixtures you pick yourself, like a faucet or toilet. We'll install them, but we can only stand behind our labor on parts we didn't source
- Bigger problems we find on the visit, quoted and approved before we start
- Water heater work, see water heater services
- Clogs and backups, see drain cleaning
Price guide
| Job | Price |
|---|---|
| Diagnostic visit, inspection and quote | $69 |
| After hours and holidays, for real emergencies | Quoted when you call |
| Hose bib replacement | About $200 |
| Faucet replacement, labor and install | A few hundred dollars |
| Toilet repair, rebuild or pull and reset | Flat rate, quoted on site |
| Pressure reducing valve replacement | Flat rate, quoted on site |
| Garbage disposal install | Flat rate, quoted on site |
What moves the price: how easy the part is to reach, whether a shutoff or supply line needs replacing at the same time, and the fixture you choose. Every price is flat rate, so the number we quote is the number you pay.
How it works
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Call us
Tell us what's leaking, dripping or not working. If water is running where it shouldn't, we'll help you find the shutoff.
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We come out
A burst pipe or active leak gets a response any time. A drip can usually wait for first thing in the morning.
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You get one price
We check the problem and your water pressure, explain the cause, and give you a flat-rate quote.
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We fix it and test
Repair or replace, then a full test before we leave so you know it's done.
What our job records show
12
Pressure reducing valves replaced since November 2025.
A flex hose that blows off under a sink is usually a symptom. We can fix the hose, but if the house is running at 100 PSI or more, it's going to happen again somewhere else. That's why we check your pressure for free on every visit.
Our records show 165 repair visits since November 2025: faucets, toilets, shutoff valves, disposals, tub drains, hose bibs and leaks, mostly in San Rafael, San Anselmo, Mill Valley and Fairfax.
Who does the work
Glenn Lopes
Owner and C36 license holder. Started Big Island Plumbing in 2017 after five years as a carpenter and a six month UPC code course. He'd rather do ten small repairs than one big remodel, so don't hesitate to call about a drippy hose bib.
Recent plumbing repair reviews
Read all our reviews on GoogleWhere we do plumbing repair
San Anselmo
Mill Valley
Fairfax
Corte Madera
Larkspur
Woodacre
San Geronimo
Ross
Tiburon
Sausalito
Santa Rosa
We also do plumbing repair in Greenbrae, Kentfield and the rest of Marin and southern Sonoma County. See all service areas
Questions we get asked
Is it worth calling a plumber for something small?
Yes. A dripping hose bib or a running toilet wastes water every day, and small jobs are a big part of what we do. We'd rather fix it now than come back for the damage later.
Why do you charge $69 to come out?
It covers a real inspection: we look at the problem, check your water pressure, explain what's going on and give you a flat price. If you go ahead or not, you leave knowing exactly what you're dealing with.
Can I buy my own faucet or toilet?
Yes, fixtures are your call. We'd just steer you to a plumbing supply house instead of a big box store, because the same model is often built differently. Anything that goes inside the wall, we supply.
Why does water pressure matter?
Pressure over about 80 PSI wears out faucets, valves, hoses and water heaters early. A pressure reducing valve keeps it in a safe range, and an expansion tank protects the system when water heats up.
Can you come today?
For an active leak or a burst pipe, yes, any time. For a drip or a slow problem, we'll usually be there first thing in the morning and save you the after-hours rate.
Are you licensed?
Yes. Big Island Plumbing holds California C36 plumbing contractor license #1090862. You can verify it on the Contractors State License Board site.
Related services
Something leaking? Call (415) 209-8142
We answer true emergencies 24/7. No job is too small.