Plumber in Corte Madera, CA

Remodeled houses: the old half still in the walls

A third category cuts across both. Plenty of local houses have been through serious remodels, and near the commercial corridor by The Village there is newer and rebuilt stock as well. They look modern and are frequently half old underneath: new fixtures tied into original branch piping behind the finish, with an original lateral out to the street. The finished half performs and the untouched half fails, so our first diagnostic question here is what was actually replaced and what was merely reconnected.

What is failing, and what the symptom is telling you

Weak flow at one fixture is usually an aerator, a cartridge or an angle stop. Weak flow everywhere at once is either a pressure regulator that has given up or a supply system that has narrowed. Rust-colored water on the first morning draw points at galvanized supply or a tank nearing its end. Hot water running out sooner than it used to is sediment occupying volume at the bottom of that tank. A drain that gurgles when another fixture runs is a venting problem, not a clog. Several fixtures backing up at once, especially the lowest ones, points past the house drain and out at the lateral. Trouble that appears only after heavy rain means groundwater entering through a defective joint.

Repair or replace, in four steps

We walk four options on every decision, in order, with the homeowner.

First, is the failure at a fitting or in the pipe body? A failed valve or a cracked closet flange is a component. A pinhole mid-run is the pipe telling you about the rest of the pipe.

Second, is this the first time? The same location for the third time in two years is a defect, and cabling it again is buying time at full price.

Third, what is the material and how much life is left in it? Galvanized supply and jointed clay lateral have a known end state. Copper, PEX and modern plastic lateral do not fail on a schedule.

Fourth, what does it cost to reach this twice? If getting to the pipe means opening finished ceilings or cutting a driveway, replacing the whole run while it is open is a small addition and returning later is not.

Access is the factor that usually decides it

Two houses can need identical pipe and price very differently, and it is almost never the pipe. Garage water heater location, continuous crawl space and an open side yard make a straightforward day. Partial crawl, an interior closet install and nowhere to stage material is the same material list plus labor. We walk the site rather than quote from a phone description.

Water heaters, and a rule changing underneath them

Water heater replacement is the most common plumbing project in this town, and the one where the rules are moving.

All of Marin County sits inside the Bay Area Air Quality Management District, so households here are covered by BAAQMD Regulation 9, Rule 6, the district's nitrogen oxides rule for natural gas fired water heaters. Its 2023 amendment established zero-NOx requirements for residential units, with a schedule running across 2027 and 2031 by unit size, which the district states applies "only upon burn out of one's current equipment". No existing gas appliance is banned, and we confirm what is in force the day we write your proposal.

Two state requirements apply regardless. Seismic bracing is statutory: Health & Safety Code section 19211 requires all new and replacement water heaters, and all existing residential water heaters, to be braced, anchored or strapped per the California Plumbing Code, and defines the appliance as a unit with a capacity of not more than 120 gallons. California's 2025 Building Energy Efficiency Standards then took effect January 1, 2026 per the California Energy Commission. That cycle set a single fuel baseline for new single-family construction, with heat pumps prescriptively required for water and space heating alike, which is not a mandate on your replacement.

If a heat pump unit is on your list, the deciding factor is usually electrical. These commonly need a dedicated 240-volt circuit, meaning a load calculation and, in plenty of older houses here, a service that has to be looked at first. We handle that under our C-10 license, so the electrical panel upgrade question and the appliance question happen with one company. Tank detail sits on our water heater page, and the on-demand path on the tankless water heater page.

Cast iron and plastic drains fail differently

Cast iron scales. The interior wall roughens and effective diameter shrinks, and solids and paper then catch on the roughness instead of sliding past. A cable punches through the obstruction and restores flow without touching the cause. Hydro jetting scours the wall itself and lasts far longer, but cast iron that has thinned in places will not survive it, so we camera the line before jetting rather than after.

Plastic does not scale, so a recurring clog in ABS or PVC is nearly always a defect: a belly where the line lost slope, a fitting with too tight a turn, or a blocked vent. Our drain cleaning service in Corte Madera covers when a line should be scoped instead of simply cleared.

The sewer lateral needs its own permit

Sewer service here is provided by Sanitary District No. 2, which on the Town's district page describes its service area as the Town, limited areas of the surrounding communities of Larkspur and Tiburon, and certain unincorporated land within Marin County. The district, not the Town building counter, is the authority for the pipe between your house and the main. Its permit list covers repair of an existing sewer lateral, installation of a new sewer lateral, new connection to a sewer main, installation of a grease trap or interceptor, and certain residential or commercial remodels that impact the sewer lateral.

Read that last item twice, because it catches people mid-project. Work that changes what the lateral carries can pull the lateral into scope on a job that began as a kitchen. Found at rough inspection, that is a schedule problem. Found during planning, it is a line item.

The district also publishes homeowner assistance: a low income grant program, a private sewer lateral pilot grant program, and a private sewer lateral loan program, each with an application on its page. We do not administer those or decide eligibility, but we write scope and documentation so an applicant has what the district asks for. Repair methods are on our sewer repair page for Corte Madera.

Two permitting authorities in one small town

Plumbing inside the building envelope is permitted by the Town of Corte Madera Building Division, and the Town schedules building permit inspections through an online Building Permit Inspection Portal. Anything on the lateral or the connection to the main runs through the sanitary district. If the address is unincorporated county land rather than inside town limits, the building authority is the Marin County Community Development Agency instead. Getting that right on day one is the difference between an inspection that happens and a rejected application.

Where the money actually goes

We do not publish prices, because a price without the house attached is a guess. What moves the number, roughly in order: access, which on a hillside address can be the single largest variable. Then extent of pipe, since replacing a run is not proportionally dearer than replacing a section once the wall is open. Then material and method, meaning copper versus PEX on supply, or spot repair versus trenchless on a lateral. Then restoration, regularly underestimated, because opening plaster, tile or concrete means putting all of it back. Then permitting, where two agencies means two processes. You get all of it in writing before we start.

Repiping, pressure and water treatment

A repipe is the answer when the supply system itself is the problem rather than a fitting on it: galvanized, or copper producing pinholes in more than one place. We run repipes in copper or PEX depending on the house, the routing available and the owner's preference, and on a hillside address routing usually decides. Where layout permits, we stage the work to keep water on overnight rather than leaving a household dry.

Pressure regulation belongs in the same scope. A house with a failed or absent regulator chews through supply connectors, fill valves and appliance hoses, and the owner experiences that as bad luck instead of one correctable cause.

Water treatment is the third piece, and we take a narrower view of it than most. We publish no hardness figure for this town, because the only number worth quoting comes from your supplier's own water quality reporting. Where testing at your tap shows a treatable issue we install and service filtration and conditioning equipment. Where it does not, we say so and save you the equipment.

Gas piping, fixtures and the smaller work

Much of what we do here is ordinary residential plumbing: angle stops that will not close, toilets that run or rock, disposals, dishwasher and refrigerator connections, hose bibs, shower valve cartridges, sump and ejector pumps in the low-lying houses that have them, and slab and under-floor leak location. Gas piping is C-36 scope too: sizing and running a line for a range, dryer or relocated appliance, plus leak testing and correcting the flexible connectors older installations accumulate.

Maintenance that pays off here

Know where your main shutoff is, and confirm it turns, before the day you need it. Older valves seize in the open position, and finding that out during an active leak costs you the only ten seconds that mattered. Flush the water heater on a schedule so sediment does not occupy volume you are paying to heat. Scope the lateral once if it has never been looked at, and again if mature trees sit over the run: autumn is the sensible time, since a defect found in dry weather is a planned repair and the same defect found in a February storm is not. Plan coverage across our trades is on our Marin County plumbing page.

Power shutoffs and what stops working

Hillside parts of town sit in the elevated fire risk landscape PG&E addresses through its Public Safety Power Shutoff program, under which the utility turns off power during severe weather to help prevent wildfire. A tankless water heater has electronic ignition and controls, so it produces no hot water without power. Sump and sewage ejector pumps stop, which matters most in exactly the low-lying spaces that need them. A standard atmospheric-vent gas tank will usually keep delivering the hot water already stored in it, an input into the tank-versus-tankless decision that rarely gets mentioned. If backup power is your answer, we are a Certified Generac Generator installer.

Where we work in Corte Madera

We cover the whole town: the flats and the streets around Cove School, Christmas Tree Hill and the older upper lanes, the neighborhoods along the highway corridor near The Village, and the adjoining unincorporated pockets where the county rather than the Town issues the permit. A full view of what we run at this address is on the Corte Madera service area page.

How to choose a plumber for this work

Four questions separate contractors here. Ask whether they hold a C-36 license and will name the classes they carry. Ask who pulls the permit and whether they will handle the sanitary district as well as the Town when the lateral is in scope, because a contractor who has not worked here may not know there are two authorities. Ask whether they will camera or pressure test before quoting. Ask what happens to the price if what they find behind the wall is worse than expected, and get that answer up front.

What North Bay homeowners say

Two recent notes from customers in our service area:

Plumbing across Corte Madera and Marin

More from Ongaro & Sons in this area: plumbing across Marin County, the full Corte Madera service matrix, and the same trade in neighboring towns, Mill Valley and San Rafael.