Looking for a plumber in Half Moon Bay, CA? Works Plumbing repairs and replaces plumbing in homes from Downtown and Main Street to Ocean Colony, Miramar and Arleta Park. We are a family company, in business since 2009 and based in Pacifica, licensed and insured under CSLB #982663. Same-day appointments and 24/7 emergency service are available across the city.
Get a Free Estimate
Upfront pricing. Same-day service. No obligation.
"*" indicates required fields
We’ll call you back fast.
THIS MONTH’S BEST DEAL
$75
OFF
$75 OFF Any Plumbing Repair Over $500
One-time use. Combine with our 24/7 emergency service and pay only when the job is done. Mention this offer when you book.
Plumbing problems Half Moon Bay homes have in common
In Half Moon Bay, where a house sits often matters more than how old it is. The water plant, the sewer agency and the distance to a creek all change what a repair looks like.
A younger housing stock
Census estimates put the median year built at 1982, and the 1970s and 1980s were the busiest building decades. A smaller group of about 195 homes dates to 1939 or earlier. That puts many homes at the age when original water heaters, shutoff valves and fixture parts reach the end of their service life.
Coastside County Water District supply
CCWD serves the city along with El Granada, Miramar and Princeton. Two plants feed the system: Nunes water averaged moderately hard in 2025 and Denniston water was soft, so scale can differ from one home to another. CCWD’s inventory found no lead pipe or fittings on the district side of service lines. Before fixtures are added, the city’s permit application asks owners to confirm meter capacity with CCWD.
City sewer, GCSD and SAM
The City of Half Moon Bay runs about 37 miles of sewer mains, 3,100 laterals and three lift stations. Granada Community Services District serves the northern portion of the city, and Sewer Authority Mid-Coastside treats flow from both. The city’s own FAQ tells owners to call a plumber first in a backup, since most problems start in the lateral, which is why drain cleaning in Half Moon Bay is so often the first step. A Water Board study also found septic parcels in the Frenchmans Creek and Pilarcitos Creek watersheds. We refer septic tank work to septic specialists and handle the plumbing inside the home.
Creeks and low ground
FEMA 100-year flood zones run along Frenchmans Creek and Pilarcitos Creek, and the city expects sea level rise to hit hardest at the mouth of Pilarcitos Creek. Low lots near either creek are where water is most likely to collect at a foundation, and where sump pump service in Half Moon Bay earns its place.
Gas and the electrification rules
Utility gas heats 3,177 of 4,151 occupied homes by Census count. The city’s electrification ordinance says existing all-electric homes may not add gas or propane and that gas lines in existing buildings must be capped or decommissioned by 2045, so gas repairs here are planned with that date in view.
Why Half Moon Bay homeowners call Works Plumbing
Family owned since 2009, with our home base in Pacifica
State licensed and insured under CSLB #982663
A firm price up front, before any work begins
Same-day appointments and 24/7 emergency response
Plumbing services we provide in Half Moon Bay
Sewer and drain lines
Grease and roots that keep coming back are cleared with hydro jetting in Half Moon Bay. A sewer camera inspection in Half Moon Bay shows the condition of the lateral and where it meets the city or GCSD main, and the recording is available on request. Cracked or root-split laterals can be renewed through trenchless sewer repair in Half Moon Bay, using lining or pipe bursting. Before lateral work, we confirm whether the home connects to the city system or to GCSD, since that decides who we coordinate with on the public side.
We diagnose the issue and show you a flat price upfront.
You approve it, then our tech gets to work from a fully-stocked truck.
We test the fix twice and leave your space cleaner than we found it.
Works Plumbing van on a residential street in Half Moon Bay
Why homeowners choose Works
Every job comes with upfront pricing, licensed and background-checked technicians, and a 100% satisfaction guarantee . No surprises, no pressure, ever.
Pro tip
Find your gas meter shutoff and main water valve now, and keep a shutoff wrench by the gas meter. In a city this close to an active fault, knowing both before a strong earthquake matters more than any repair afterward.
See how we handle it:
Prefer to listen? Catch this topic on our homeowner podcast:
▶
The Works Plumbing Podcast · Homeowner Tips
Get a Half Moon Bay plumber
Whether the problem is in Ocean Colony, Miramar or a house near Main Street, send us the details and we will confirm a price before the work begins.
Half Moon Bay sits in active fault country, and that belongs in any plumbing plan for a home here. The city’s Local Coastal Land Use Plan hazards chapter places the San Andreas Fault about 5 miles east and puts the south end of the city within half a mile of the San Gregorio Fault. The San Gregorio and the related Denniston Creek and Seal Cove faults are mapped Alquist-Priolo zones considered active. The same chapter rates liquefaction potential anywhere from low to very high depending on location, and the city lists Seismic Design Category E among its local design criteria.
Pipes are rigid and fastened to a building that moves. In a strong quake, the points that concern us are where something heavy or something under pressure meets the structure:
A water heater that is not braced can shift or tip and pull on its water and gas connections. State law requires residential water heaters to be braced, anchored or strapped, and sellers must certify it at sale.
Gas connections at the heater, range, dryer and furnace are the joints we check first after shaking.
Buried supply lines and sewer laterals in softer ground take strain where they enter the house.
Most of this is simple to correct before an earthquake and costly to deal with after one. On a water heater call in Half Moon Bay, we look at the strapping before anything else. On gas work, we test the system and inspect each appliance connection. When a sewer or water line has to be replaced, we can use a jointless liner or fused pipe where it fits, and we explain the options and their costs before you choose.
FAQ
Half Moon Bay plumbing questions.
Here are the questions we hear most. Don’t see yours? Give us a ring, a real human answers, day or night.
The whole city. We work in Downtown and along Main Street, Wavecrest, Miramar, Ocean Colony, Pacific Ridge, Surf Beach, Highland Park, Casa del Mar, Arleta Park, Grandview Terrace and Canada Cove, plus the homes off Kelly Avenue and Highway 92. El Granada and Princeton are on the same routes.
Should my gas line be checked after an earthquake?
If you smell gas, leave the house and call the gas utility or emergency services from outside. If there is no odor but the house shook hard, have the appliance connections and the water heater strapping checked before relighting anything. We pressure test the gas system and look at each connector, and we replace stiff or damaged ones on the spot.
Do you work on homes near the Miramar bluffs?
Yes. The city’s hazard chapter records bluff retreat along this coast, so before any digging near the edge we locate the lateral and water line and plan the route with the property’s limits in mind. We do plumbing, not bluff or slope repair, and we tell you when an engineer needs to be involved.
Do you pump or repair septic systems in Half Moon Bay?
No. We refer septic tank pumping, inspection and repair to septic specialists. On a septic property we still repair the plumbing inside the house, clear the drain lines leading out and replace fixtures and water heaters. If a backup looks like a tank problem, we say so before doing any work.
Can you install a heat pump water heater in Half Moon Bay?
Yes. A heat pump unit needs a suitable electrical circuit, room for air flow and a condensate drain, so we check all three before quoting. In homes moving away from gas, we can cap the old gas branch at the same visit. We handle the permit and the inspection.
Do you take calls from small businesses on Main Street?
Yes. Works Plumbing serves homes and light commercial spaces, so a Main Street shop, office or small restaurant can call us for restroom fixtures, drain clearing, water heaters and gas connections. Larger commercial systems may need a specialty contractor, and we say so at the first visit.
Nearby Areas We Serve
Just outside Half Moon Bay.
Nearby, we also work in El Granada, Moss Beach, Montara and Pacifica.
We’ve earned our reputation one happy homeowner at a time.
“I had a backed up kitchen drain and David from Works Plumbing came out and cleared the line in a matter of minutes. Very professional and very knowledgeable. Definitely recommend!”
GG
George G.
Daly City · Yelp Review
“Great professional and quick service! Shamir was friendly, efficient, and professional. He fixed the leaking problem in my sink and garbage disposal in under an hour. Highly recommend!”
MR
Maria R.
Oakland · Google Review
“Thank you again for another job well done, and thank you for responding right away. I will continue to recommend Works Plumbing because they respond right away and get the job done efficiently.”
DK
David K.
San Mateo · Google Review
Google reviews
Yelp reviews
A+
BBB Accredited
Pay Your Way
BIG REPAIR? SMALL PAYMENTS.
Plumbing emergencies don’t wait for payday. Spread your cost over 12, 24, or 60 months with affordable financing options through trusted partners.
A real human will answer, dispatch a stocked Works van, and get someone at your door the same day. No phone trees. No robots. No “we’ll get back to you Monday.”
Google rated. BBB A+ accredited.
TAP TO CALL • 24/7