Local & responsive
Best for fast help when you need it
- Same-day appointments often available
- Crews based in Sonoma County
- We know local homes & water
Plumber in Cotati, fast, honest, and local since 2007.
Simeone Plumbing is your local plumbing team for Cotati, from the older homes ringing La Plaza and the hexagonal downtown streets to the newer tracts on the west side. The early-1900s houses near the Plaza often still have cast-iron and galvanized pipe, so we handle repipes, water heaters, drains, leaks, and sewer lines, all at a price agreed before we start.
- 4.9 from 114 Google reviews
- Make‑It‑Right Guarantee
- Diagnostics from $99
- Same-day often available
Plumbing services we offer in Cotati
Water heaters
Repair, tankless & standard installs, and maintenance.
More on water heatersDrain cleaning
Clogged drains, hydro jetting, and recurring backups.
More on drain cleaningLeak detection
Find hidden water, slab & gas leaks without the demolition.
More on leak detectionWater lines & repiping
Main line repair and whole-home repiping.
More on water lines & repipingSewer & trenchless
Sewer line repair and no-dig trenchless replacement.
More on sewer & trenchlessGas lines
Installs, extensions & repairs for ranges, heaters & more.
More on gas linesToilets, faucets & fixtures
Running toilets, dripping faucets, and clean new installs.
ToiletsFaucetsWater filtration
Whole-home filtration, softeners & drinking water.
More on water filtration
Reviews
Cotati neighbors, in their words
“I had an issue with my iSpring reverse osmosis water filtration system and called Simeone Plumbing for help. Abel Espinoza came out the same day and quickly diagnosed the problem. …”
“We moved into a house that needed some sewer work done, called around and got three estimates and we decided to work with Simeone. From the first time we chatted they were up front, professional, and knew how to deal with a high maintenance client like myself. …”
“I wish I could give this company 10 stars! This was my second time using Simeone and they are consistently professional and courteous from start to finish. …”
Why Cotati homeowners call Simeone
From a dripping faucet to a whole-home repipe, one trusted local team handles it all, at a price you approve first.
Financing available. Qualifying projects can be financed through Synchrony. Ask about your options when you request an estimate.
Everything we do
Full-service plumbing in Cotati
Residential plumbing
Repairs, installs, water heaters, drains, leaks, fixtures, repipes, and remodels for Cotati homes, done cleanly and backed by our guarantee.
Commercial plumbing
Dependable plumbing for Cotati businesses, property managers, and light commercial, from service calls to tenant improvements.
- Urgent Repairs
- New Construction
- Tenant Improvements
- Fixture Upgrades
- Backflow
- Maintenance
How it works
Book in minutes
Call or book online and tell us what’s going on at your Cotati property.
Fixed price first
We diagnose and give you one upfront price, no hourly clock.
Done right
We do the work cleanly, test it, and back it with our Make‑It‑Right Guarantee.
Backed by our guarantee
Warranty terms depend on the unit and the service, and your tech puts them in writing. Our Make‑It‑Right Guarantee covers the workmanship.
Local since 2007
Your Cotati neighbors count on us.
Simeone Plumbing has served Cotati homes and businesses since 2007, from the homes around La Plaza and the downtown hexagon to the west-side tracts and the East Cotati Avenue corridor. Licensed, local, and backed by our Make‑It‑Right Guarantee.
- Serving every Cotati neighborhood
- Licensed CA C-36 #890196
- Upfront pricing, no surprises
- Serving Sonoma County since 2007
Local knowledge
What plumbing in Cotati actually looks like
Cotati is small, was incorporated in 1963, and has the newest housing stock of the towns around here, the 1980s alone account for nearly a third of it. But it also has the most interesting water in the county, and that drives a lot of what we do here.
Iron and manganese, the Cotati signature
The city says it outright in its water quality reports: Wells 1A and 3 have elevated manganese and iron in the raw water, and the city filters it for that reason. In the raw well water, iron has averaged around 433 micrograms per litre with readings up to 1,300, against a 300 aesthetic limit, and manganese has averaged 56 against a limit of 50. The city treats it, but iron and manganese are exactly what cause orange or brown staining in sinks and tubs, dark specks from the tap, clogged aerators and sediment in the bottom of a water heater. If you are seeing that, whole-house filtration is a real fix, not an upsell.
Water that changes with the season
Cotati runs conjunctive use, more imported Russian River water in winter, more of its own wells in summer. The mix has swung from about 63 percent imported in one recent year to about 74 percent in another. The well water is harder (averaging around 133 ppm, ranging as high as 210) and more acidic (pH around 6.9 versus 7.6 for the imported supply). So if your water tastes, stains or scales differently in August than it does in February, you are not imagining it.
A newer town, but the infrastructure is catching up
Nearly a third of Cotati’s housing went up in the 1980s and another quarter in the 1970s, so most homes here are between 35 and 55 years old. That is squarely water-heater-replacement and angle-stop territory rather than repipe territory. The city’s own ten-year capital plan acknowledges the age of the system, with tank replacement, water main replacement, sewer collection renewal and lift station rehab all on the list.
Sandy loam, not adobe
Unlike Rohnert Park next door, Cotati mostly sits on Haire and Cotati fine sandy loam, low shrink-swell. That is good news: less soil movement stressing buried water and sewer lines. When we find a failed lateral in Cotati it is usually age, roots or a bad joint rather than the ground shifting underneath it.
About the water
Cotati draws from two connections to the Sonoma Water aqueduct plus three city-owned wells, 1A, 2 and 3. The imported water is softer and more neutral; the well water is harder, more acidic, and carries the iron and manganese the city filters for. Both are safe and tested. What varies is the aesthetics: staining, taste and scale. We install whole-house filtration, softeners and drinking water systems, and we will tell you which of the three you actually need.
About permits
Plumbing permits come from the City of Cotati Building Division on West Sierra Avenue, handled through their online permit system. Water heaters, repipes, gas lines and sewer work all require one. We pull it and meet the inspector. Wastewater from Cotati is collected by the city and treated at the Santa Rosa subregional plant.
Ways to save in Cotati
Mention the code when you call, or add it to the notes when you book online.
Water heaters
Free
10-year tank warranty with a new American Standard.
On a new 40 or 50 gallon tank installed by Simeone, tank and parts coverage goes from 6 years to 10.
See water heater optionsDrains and sewer
Free
Sewer camera inspection with any drain service.
At the regular drain service price, we run a camera through your main line from a ground-level clean-out so you see roots and cracks.
See drain servicesSeniors 65 and older
10% off
Senior discount up to $250, any service.
For neighbors 65 and older. Mention the code when you book.
Residential only. One per household. Specials cannot be combined with each other or with any other discount.
Cotati plumbing questions, answered
Why do my sinks and tub stain orange or brown in Cotati?
Almost certainly iron. The city has stated that Wells 1A and 3 carry elevated iron and manganese in the raw water, iron has tested as high as 1,300 micrograms per litre against a 300 aesthetic limit. The city filters it, but depending on the blend running at the time you can still see staining, dark specks and clogged aerators. Whole-house filtration solves it at the point where water enters the house.
Is Cotati water hard?
Moderately, and it depends on the season. The city’s wells average around 133 ppm and have tested as high as 210; the imported Russian River water is softer, around 104. Since Cotati uses more well water in summer, hardness and scale get worse in the warm months.
My water heater fills with sediment fast. Is that normal here?
It is common in Cotati, and iron and manganese are usually why. Sediment settles to the bottom of a tank heater, insulates the burner, and shortens the heater’s life. An annual flush helps; filtration upstream helps more. We do both.
Do I need a permit to replace a water heater in Cotati?
Yes, through the City of Cotati Building Division. It covers seismic strapping, venting, expansion tank and the drain pan and discharge line. We pull it.
Do you offer same-day plumbing in Cotati?
Often, yes. Office hours are Monday to Friday, 7:30am to 4:30pm. Call and we will tell you the soonest we can get there.
Do you cover Cotati and the surrounding area?
Yes, all of Cotati, plus Rohnert Park, Penngrove and the rest of Sonoma County.
Need a plumber in Cotati? Let's get it scheduled.
Same-day appointments often available across Sonoma County.