# Repiping in the Sunset District and Parkside, San Francisco > Repiping in the Sunset, Parkside, West of Twin Peaks and the Excelsior: houses over a garage, galvanized mains, SFPUC service lines and DBI permits. URL: https://hilltoprepipesanfrancisco.com/service-areas/sunset-parkside/ Last Updated: October 30, 2026 - **San Francisco Department of Building Inspection (PermitSF)** issues the plumbing permit (City and County of San Francisco) - **2025 San Francisco Plumbing Code (2025 California Plumbing Code as amended by San Francisco)** sets the pipe materials and tests - **San Francisco Public Utilities Commission (SFPUC)** supplies the water - **Repipe permits:** 66 domestic water repipe permits filed 2021 to 2025 (Sunset/Parkside and Inner Sunset, DataSF) ## What starts a repipe in Sunset and Parkside ### Rust-colored water after a weekend away Galvanized mains along the garage ceiling shed rust when water sits and then moves. When it shows at more than one tap, the piping is the usual suspect. ### SFPUC replaced its side at the sidewalk New utility copper now meets an old galvanized owner's line at the meter box, and that line feeds the same era of pipe inside the house. ### The upstairs shower loses pressure when a toilet flushes A trunk narrowed by rust starves the far end of the house first. Static pressure is measured before anyone blames the pipe. ### A garage conversion or ground-floor remodel Finishing the garage covers the easiest pipe in the house. Replacing the mains before the ceiling closes costs far less than coming back. ## Services in Sunset and Parkside ### [Whole-house repiping](https://hilltoprepipesanfrancisco.com/whole-house-repiping/) Every hot and cold supply line from the main valve to each fixture, in PEX or copper, tested and inspected. Whole-house repiping ### [Galvanized pipe replacement](https://hilltoprepipesanfrancisco.com/galvanized-pipe-replacement/) Old threaded steel supply pipe replaced with PEX or copper, with listed transitions, a flush for loosened rust and a city inspection. Galvanized pipe replacement ### [Water service line replacement](https://hilltoprepipesanfrancisco.com/water-service-line-replacement/) The owner's buried water line from the meter box to the building replaced, usually in copper, with the permit, any sidewalk work and the connection to the house. Water service line replacement ### [PEX repiping](https://hilltoprepipesanfrancisco.com/pex-repiping/) New hot and cold supply in crosslinked polyethylene tubing, routed through joists and chases with fewer openings, tested and inspected. PEX repiping Stand in a Sunset garage and look up, and you can often see the whole water system of the house: the line from the sidewalk, the main valve, the water heater and the trunk lines running toward the kitchen and bathroom overhead. [Hilltop Repipe San Francisco](https://hilltoprepipesanfrancisco.com/) replaces supply piping in the Sunset, Parkside and the neighboring west and southwest districts, from [whole-house repipes](https://hilltoprepipesanfrancisco.com/whole-house-repiping/) to [galvanized pipe replacement](https://hilltoprepipesanfrancisco.com/galvanized-pipe-replacement/), with the work carried out by licensed and insured contractors under a DBI permit. That garage ceiling is the reason this part of the city gets its own page. It changes where the new pipe goes, how many walls are opened and what a repipe disrupts. ## Why the garage ceiling changes the job San Francisco Planning’s context statement on Sunset District builders of 1925 to 1950 describes houses with the garage built into the ground story, “which typically resulted in living spaces located above the ground-story garage.” It calls the one-story-over-garage format characteristic of the Sunset, with no known examples outside San Francisco except, later, Daly City. Ground stories varied: some held only the garage, others a laundry or finished rooms. Where a house follows that pattern, the main supply lines usually hang from the garage ceiling, below the floor of the living space. A repipe can replace that trunk from below, working on open joists, and bring each branch up through the floor to the fixture it serves. Openings upstairs are then limited to where a line has to climb into a wall: behind the kitchen sink, at the bathroom group, at a laundry. The garage also becomes the staging area, which keeps tools and cut pipe out of the rooms people are living in. Where the ground story has been finished into a room, that advantage shrinks, and the ceiling has to be opened and patched like any other. ## What the housing numbers say In the Census Bureau’s ZIP area that covers most of the Sunset, 45.9% of housing units were built in 1939 or earlier and another 29.0% between 1940 and 1959. Half are single-unit buildings and 30.0% are in buildings of two to four units. In the area that covers Parkside, 84.7% of units are single-unit buildings and 50.4% were built between 1940 and 1959. Those dates span the galvanized-steel era and the first years of copper, so a Sunset house can hold either, or both where earlier leaks were patched. Housing age is context, not a diagnosis: only tracing the pipe in a particular house says what is in it. ## How a Sunset job usually runs The walk-through starts at the meter box at the sidewalk and the main valve, which in most houses sits where the supply enters, in line with the meter, and measures static pressure. The city has about 13 pressure zones fed from reservoirs and tanks at different elevations, and the Sunset runs from the ocean flats up to Golden Gate Heights, so pressure is measured at each address rather than assumed. Then the trunk is traced across the garage ceiling to each riser, the fixtures are counted, and the walls upstairs are noted as plaster, drywall or tile. The written scope names PEX or copper, the layout, each opening and the permit. During the work, new lines are run alongside the old ones, then each fixture group is switched over, so water is off in stages. The water heater, often standing in the garage, is reconnected with a valve on its cold supply and straps in the upper and lower thirds. The system is pressure tested, the city inspector sees it, and the openings are closed. The [guide to how invasive repiping is](https://hilltoprepipesanfrancisco.com/guide/how-invasive-is-repiping/) shows what those openings look like. ## Where the street meets the house The meter box belongs to SFPUC, and so does the line from the water main to it. SFPUC has been replacing its galvanized lines with copper and has written to owners whose own side, from the meter box to the house, it identified as galvanized. Where both sides were replaced at different times, a short run of old steel sits between new copper at the sidewalk and whatever is inside. Replacing that owner’s line during the repipe means the new system is not fed through rusted pipe. The [water service line replacement](https://hilltoprepipesanfrancisco.com/water-service-line-replacement/) page covers it, and the [guide to whether galvanized pipes are safe](https://hilltoprepipesanfrancisco.com/guide/are-galvanized-pipes-safe/) covers water quality questions. ## Permits on the record DataSF publishes DBI’s plumbing permits. Among permits filed from 2021 to 2025 whose descriptions name domestic water repiping, Sunset/Parkside and the Inner Sunset account for 66, among the highest of any group of neighborhoods in the city, and 120 over 2016 to 2025. Many permits list only a work code with no description, so the real number is higher. The count shows where documented repipe work happens; it does not say anything about the condition of a given house. The [San Francisco repiping permit guide](https://hilltoprepipesanfrancisco.com/guide/san-francisco-repiping-permit/) covers the steps. ## West of Twin Peaks West Portal, St. Francis Wood, Forest Hill, Miraloma Park and the streets around them form a heavily owner-occupied, single-family district. In the Census ZIP area covering them, 90.6% of housing units are single-unit buildings, 52.7% were built in 1939 or earlier, 29.2% between 1940 and 1959, and only 17.1% are rented. DBI records 25 repipe permits there from 2021 to 2025. A repipe here is an owner’s decision about their own house, without the tenancy rules that shape the job in flats. Houses tend to be larger and more varied than in the Sunset tracts, so the climbs to upstairs bathrooms and the plaster around them often decide the route more than any garage ceiling does. [Old-house repiping](https://hilltoprepipesanfrancisco.com/old-house-repiping/) covers plaster-and-lath interiors. ## Excelsior and the Outer Mission The Excelsior, Outer Mission, Crocker-Amazon, Ingleside, Oceanview and Merced Heights add 36 more documented repipe permits from 2021 to 2025. In the Census ZIP area covering most of them, 81.2% of units are single-unit buildings, 49.2% were built in 1939 or earlier and 27.0% between 1940 and 1959. The decision looks much like the Sunset’s: a single-family house of the galvanized era, an owner deciding between a partial and a whole-house job. No planning study documents a building form for these streets the way the Sunset’s does, so where a house has its mains in a ground-floor garage or a crawlspace, the route follows that; where it doesn’t, the walk-through finds the most open route available. The [partial repiping](https://hilltoprepipesanfrancisco.com/partial-repiping/) page covers jobs that stop at one floor or bathroom group. ## Flats in the Sunset Not every Sunset building is a single house. Three in ten units in the Sunset’s ZIP area sit in buildings of two to four units, and roughly half of the area’s homes are rented. In those buildings, San Francisco code requires that each unit’s hot and cold water can be shut off without cutting water to the others, and the Rent Board’s rules apply if a unit would have to be vacated during the work. The [apartment building repiping](https://hilltoprepipesanfrancisco.com/apartment-building-repiping/) page covers stacked units and shared risers. ## What it costs here Prices in the Sunset follow the same typical San Francisco-area ranges as the rest of the city: $8,500 to $16,000 for a one-bath whole-house PEX repipe, $12,000 to $22,000 for two baths and $14,500 to $28,000 for three, with multi-story or hard-access homes running higher and copper usually costing more. The [repipe cost guide](https://hilltoprepipesanfrancisco.com/guide/repiping-cost/) explains the drivers, and the [cost estimator](https://hilltoprepipesanfrancisco.com/tools/repiping-cost-estimator/) gives a range in a minute. ## Neighborhoods and coverage - Inner Sunset - Central Sunset - Outer Sunset - Parkside - Golden Gate Heights - West Portal - St. Francis Wood - Excelsior - Outer Mission ### Landmarks - Golden Gate Park - Ocean Beach - Stern Grove - Mount Davidson - McLaren Park ### Routes - 19th Avenue (CA-1) - Sunset Boulevard - N Judah and L Taraval Muni lines - Great Highway - Mission Street ## Sunset and Parkside questions ### How much does it cost to repipe a Sunset house over a garage? The same typical San Francisco-area range applies as anywhere in the city: about $8,500 to $16,000 for a one-bath house and $12,000 to $22,000 for two baths in PEX, with copper usually higher. An open garage ceiling tends to keep the openings and patching down; a finished garage or a second bathroom upstairs pushes the other way. ### Can the main lines in a Sunset garage be replaced without opening the upstairs walls? Mostly, but not completely. Where the trunk lines run along an open garage ceiling, they can be replaced from below. Each fixture upstairs still needs its new line brought up through the floor or a wall, so expect small openings at the kitchen, the bathroom and any laundry, planned in the scope before work starts. ### Does the fog and ocean air in the Outer Sunset corrode water pipes? No published source ties fog or salt air to failures of interior supply pipe in San Francisco. Galvanized pipe here corrodes from the water side, inside the pipe, over decades. Exposed exterior fittings and hose bibbs weather like any metal outdoors, which is a separate and smaller repair. ### Is a repipe in West Portal or St. Francis Wood any different from one in the Sunset? The permit, the water and the code are the same, because all of it is San Francisco. What changes is the house: West of Twin Peaks has more two-story and larger pre-war houses, so the climb to upstairs bathrooms and the plaster to work around matter more than the garage ceiling does. ### Who issues the plumbing permit for a repipe in Parkside or the Excelsior? San Francisco's Department of Building Inspection, for every neighborhood in the city. A licensed contractor files the permit on PermitSF, and the house permit is $549, or $809 when underground work is included. Inspections are booked on the same portal and happen before any wall closes. ## Related guides - Cost Guide [How much does it cost to repipe a house in San Francisco?](https://hilltoprepipesanfrancisco.com/guide/repiping-cost/)Typical San Francisco-area ranges for a whole-house repipe by number of baths, what sits inside the price, the permit fees by city, the programs that help and why two quotes for the same house can differ. - Learn [How invasive is repiping a house?](https://hilltoprepipesanfrancisco.com/guide/how-invasive-is-repiping/)A repipe opens walls in planned places, not along every pipe. Where the old lines run, what the walls are made of and how the building is stacked decide how many openings there are and how much patching follows. - Learn [Are galvanized pipes safe for drinking water?](https://hilltoprepipesanfrancisco.com/guide/are-galvanized-pipes-safe/)Galvanized steel is not lead pipe, and San Francisco's tap results are low. The real questions are what the pipe was once connected to, what its rust carries into the water and how much life the steel has left. - Learn [Why is my water pressure low in San Francisco?](https://hilltoprepipesanfrancisco.com/guide/low-water-pressure/)Low pressure can start at the street, the service line, a valve, a pressure regulator, the pipe inside the walls or the fixture itself. In a city of hills and old galvanized pipe, measuring before blaming is the whole game. ## Nearby service areas - City of Daly City [Daly City](https://hilltoprepipesanfrancisco.com/service-areas/daly-city/)Daly City Building Division permits, water from Daly City Department of Water and Wastewater Resources. - City and County of San Francisco [Mission and Noe Valley](https://hilltoprepipesanfrancisco.com/service-areas/mission-noe-valley/)San Francisco Department of Building Inspection (PermitSF) permits, water from San Francisco Public Utilities Commission (SFPUC). - City of South San Francisco [South San Francisco](https://hilltoprepipesanfrancisco.com/service-areas/south-san-francisco/)South San Francisco Building Division permits, water from California Water Service (Cal Water), Bayshore District.