# Repiping Flats Buildings in the Mission, Noe Valley and the Castro > Repiping flats buildings in the Mission, Noe Valley, Castro, Bernal Heights and Haight: per-flat shutoffs, DBI permits, Rent Board rules and lead-safe work. URL: https://hilltoprepipesanfrancisco.com/service-areas/mission-noe-valley/ 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:** 68 domestic water repipe permits filed 2021 to 2025 (Mission, Noe Valley, Castro, Bernal Heights, Haight, Glen Park and Potrero Hill, DataSF) ## What starts a repipe in Mission and Noe Valley ### Shutting off one flat shuts off the whole building Older flats were often piped with a single main valve. San Francisco code now asks that each unit's hot and cold water can be shut off without cutting water to the others. ### The upstairs flat reports brown water Rust from galvanized risers shows first after water sits. In a building of flats, one complaint usually means checking the shared pipe, not only one faucet. ### One flat is being remodeled A remodeled unit has to meet the city's shutoff and fixture valve rules, and opening its walls exposes the risers that serve every flat above and below it. ### Leaks keep appearing at threaded joints Galvanized pipe is thinnest at its threads. Leaks at different joints along the same run usually say more about the run than about any one joint. ## Services in Mission and Noe Valley ### [Apartment building repiping](https://hilltoprepipesanfrancisco.com/apartment-building-repiping/) Mains, risers and unit branches replaced in occupied flats and apartment buildings, one stack at a time, with a permit for each unit. Apartment building repiping ### [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 ### [Partial repiping](https://hilltoprepipesanfrancisco.com/partial-repiping/) A defined part of the supply system replaced, such as the hot side, one floor, one bathroom group or one flat, with the old pipe that stays written down. Partial repiping ### [Old-house repiping](https://hilltoprepipesanfrancisco.com/old-house-repiping/) Supply piping replaced in pre-war houses and flats, routed to spare original plaster and trim, with lead-safe openings and modern valves. Old-house repiping A repipe in a Mission or Noe Valley flats building has to answer a question a single-family job never faces: how each household keeps running water while the pipes behind its walls are replaced. [Hilltop Repipe San Francisco](https://hilltoprepipesanfrancisco.com/) offers and manages repiping for flats buildings and houses across the Mission, Noe Valley, the Castro, Bernal Heights and the Haight, from [apartment building repiping](https://hilltoprepipesanfrancisco.com/apartment-building-repiping/) of a whole stack to [partial repiping](https://hilltoprepipesanfrancisco.com/partial-repiping/) of one unit, with the work carried out by licensed and insured contractors under DBI permits. These neighborhoods share a building type. In the Census Bureau’s ZIP areas covering the Mission and Bernal Heights, the Castro and Noe Valley, and the Haight and Cole Valley, 61% to 70% of housing units were built in 1939 or earlier, 37% to 41% sit in buildings of two to four units, and between 55% and 71% are rented. Old pipe, small buildings and tenants in place: that combination shapes a repipe here. ## Water for every flat while the work goes on In an occupied building, the schedule matters as much as the pipe. New lines are run alongside the old ones, then each flat or fixture group is switched over in turn, so water goes off in stages. Where a basement or ground-floor garage exposes the mains, the new trunk can be built and tested there before any flat loses water. The risers take the most planning: each one feeds a kitchen or bathroom stack in every unit above it, so its changeover is arranged with every household on that stack. The written scope says which flats lose water on which days. Keeping each unit habitable, with water back on each evening, also keeps the project out of the Rent Board’s temporary eviction process described below. The [guide to how invasive repiping is](https://hilltoprepipesanfrancisco.com/guide/how-invasive-is-repiping/) shows the openings involved, and the [guide to how long repiping takes](https://hilltoprepipesanfrancisco.com/guide/how-long-does-repiping-take/) covers the schedule. ## One shutoff per flat, and a valve at every fixture San Francisco amends the state plumbing code in ways that matter most in flats. Section 606.3 requires one or more shutoff valves in each dwelling unit, placed so the hot and cold supply to any unit can be shut off without cutting water to another. Section 606.5 requires a control valve ahead of each fixture’s hot and cold supply. Section 606.2 requires a valve on each water heater’s cold supply and, where one heater serves several units, valves that let each unit’s hot water be shut off on its own. Under 606.3.1, any unit where a remodel is performed has to be brought up to those rules. Many older flats predate all of this: one main valve, and no way to isolate a single flat when the top unit leaks. A repipe is the natural moment to add the valves, because the lines that need them are already open. The [old-house repiping](https://hilltoprepipesanfrancisco.com/old-house-repiping/) page covers pre-war construction, and the [whole-house repiping](https://hilltoprepipesanfrancisco.com/whole-house-repiping/) page lists what a full repipe includes. ## How stacked flats are usually piped No city study documents the piping layout of these buildings, so the walk-through traces it. Where kitchens and bathrooms are stacked floor above floor, the supply rises in a few vertical runs from a main below, and new risers can follow the same chases, so openings line up instead of scattering through every room. Where flats were added or rearranged later, the piping follows the remodel, and copper, galvanized and newer plastic can all turn up in one building. Where new copper meets steel that stays in service, San Francisco’s Section 604.1 requires a dielectric or insulating fitting, or a brass nipple at least 6 inches long, at the joint. The [guide to identifying pipe material](https://hilltoprepipesanfrancisco.com/guide/how-to-identify-pipe-material/) explains what to look for, and [galvanized pipe replacement](https://hilltoprepipesanfrancisco.com/galvanized-pipe-replacement/) covers the steel itself. ## Permits for a building of flats In DBI’s permit data on DataSF, 68 permits filed from 2021 to 2025 in these neighborhoods, Glen Park and Potrero Hill describe domestic water repiping, 15 of them in Bernal Heights. Many permits list only a work code, so the true number is higher. For residential buildings of six or fewer units, DBI’s plumbing fee is $549, or $809 when the work includes underground plumbing. DBI also requires a separate permit for each existing apartment unit, so a building of flats carries more than one permit and more than one fee, with the categories settled when the licensed contractor files on PermitSF. Every permit needs its inspections before walls close, and a failed or extra inspection costs $259 per half hour. The [San Francisco repiping permit guide](https://hilltoprepipesanfrancisco.com/guide/san-francisco-repiping-permit/) walks through filing. ## If a flat has to be empty for the work Sometimes a unit cannot stay livable during the work, for example when the kitchen and the only bathroom are opened at once. The Rent Ordinance then allows a temporary eviction for capital improvements under Section 37.9(a)(11), but only if the unit would be hazardous, unhealthy or uninhabitable while the work is under way. The landlord must have the permits before serving notice, the notice must include copies of them and an approximate date for moving back, and a tenant cannot be required to stay out of the unit for more than three months unless the Rent Board extends it. Relocation payments apply when a tenant is out of the unit for 20 days or more: under the Rent Board’s current schedule, which resets each March, $8,245 per tenant, up to $24,733 per unit, plus $5,497 for each tenant who is 60 or older or disabled, or each household with minor children. Shorter displacements fall under California Civil Code 1947.9 at a daily rate, currently $446. A repipe that restores water every evening avoids this process, which is why the phasing plan comes first. Owners should confirm their situation with the Rent Board or counsel. ## Recovering the cost from rent-controlled units A repipe can qualify as a capital improvement, which lets a landlord petition the Rent Board, after the work, to pass part of the certified cost through to tenants of the building. In buildings of one to five units, new plumbing is amortized over 20 years, the full certified cost may pass through, and the yearly increase is capped at the greater of $30 or 5% of base rent. Repairs do not qualify, and the Rent Board decides. The petition relies on itemized invoices and bids, so keep them from the start. The [guide to whether repiping is a capital improvement](https://hilltoprepipesanfrancisco.com/guide/repiping-capital-improvement-san-francisco/) covers the petition. ## Paint, plaster and the three-day notice San Francisco presumes paint in buildings built before 1979 contains lead unless a certified inspector shows otherwise, and Section 327 of the city’s Existing Building Code sets work practices when that paint is disturbed. For a rented flat or a shared hallway, that means plastic containment, restricted access, wet cleaning with HEPA vacuuming, a “Lead Work in Progress” sign and written notice to occupants at least three business days before work starts. Interior work in an owner-occupied unit is exempt from the interior rules, though dust may not migrate into common areas. The Bay Area Air Quality Management District adds a second check: in residential buildings of four or fewer units, its asbestos rule requires sampling only when certain materials will be disturbed, textured or skim-coated walls among them. A flat with skim-coated plaster can need a sample before the first wall opens. ## The Richmond District The Inner and Outer Richmond, Laurel Heights, Presidio Heights and Lone Mountain sit between the flats belt and the single-family west side. In the Census ZIP areas covering them, 55% to 57% of units were built in 1939 or earlier, 36% to 40% are in buildings of two to four units and 26% to 38% are single-unit buildings. DBI records 28 repipe permits there from 2021 to 2025, half in the Outer Richmond. The right approach depends on the building, not the neighborhood: a Richmond building of flats follows everything on this page, while a single-family house there plans more like a [Sunset repipe](https://hilltoprepipesanfrancisco.com/service-areas/sunset-parkside/). ## Prices for a flat and for the building For a single-family house here, the typical San Francisco-area figures for a whole-house PEX repipe hold: $8,500 to $16,000 with one bath, $12,000 to $22,000 with two, $14,500 to $28,000 with three. Multi-story or hard-access homes can run higher, and copper usually costs more. A building of flats is priced from its own scope, not a per-unit formula: units and risers, occupied flats and the phasing they need, per-unit permits, code valves, lead-safe setup and patching. The [repipe cost guide](https://hilltoprepipesanfrancisco.com/guide/repiping-cost/) explains each driver, and the [cost estimator](https://hilltoprepipesanfrancisco.com/tools/repiping-cost-estimator/) gives a range for a house in a minute. ## Neighborhoods and coverage - Mission District - Noe Valley - The Castro / Eureka Valley - Bernal Heights - Haight-Ashbury - Cole Valley - Duboce Triangle - Glen Park ### Landmarks - Mission Dolores Park - Mission Dolores - Castro Theatre - Bernal Heights Park - Buena Vista Park ### Routes - Mission Street - Valencia Street - 24th Street - J Church and N Judah Muni lines - 16th Street and 24th Street BART stations ## Mission and Noe Valley questions ### What relocation payments apply if a flat has to be vacated for a repipe? Only when the work makes the unit uninhabitable. If a tenant is out of the unit for 20 days or more, the Rent Board's current schedule applies: $8,245 per tenant, up to $24,733 per unit, plus $5,497 for each tenant 60 or older or disabled, or each household with minor children. Shorter stays fall under California Civil Code 1947.9, currently $446 a day. ### Does San Francisco's lead paint rule apply when walls are opened in a rented flat? Yes, in a building built before 1979. Section 327 of the San Francisco Existing Building Code requires containment, restricted access, HEPA clean-up, a posted sign and written notice to occupants at least three business days before painted surfaces are disturbed. Interior work in an owner-occupied unit is exempt from the interior rules, though dust may not reach common areas. ### What are DBI's permit fees for repiping a building of flats in Noe Valley? For residential buildings of six or fewer units, DBI's plumbing fee is $549, or $809 when underground work is included, and DBI requires a separate permit for each existing apartment unit. A building of three flats therefore carries more than one fee, settled when the contractor files on PermitSF. Re-inspections cost $259 per half hour. ### How many repipe permits are filed in the Mission, Noe Valley and nearby neighborhoods? DBI's permit data shows 68 permits filed from 2021 to 2025 in the Mission, Noe Valley, the Castro and Upper Market, Bernal Heights, the Haight, Glen Park and Potrero Hill whose descriptions name domestic water repiping, and 150 over 2016 to 2025. Many permits carry only a work code, so the real number is higher. ### Is a building in the Richmond District repiped like a flat or like a house? It depends on the building. The Richmond has large numbers of both stacked flats and single-family houses, so a two- to four-unit building follows the per-unit shutoff, permit and Rent Board steps for flats, while a single-family house is planned like a Sunset repipe. The walk-through settles which applies. ## Related guides - Learn [Is repiping a capital improvement in San Francisco?](https://hilltoprepipesanfrancisco.com/guide/repiping-capital-improvement-san-francisco/)For owners of rent-controlled buildings, a repipe raises two Rent Board questions: whether the cost can be passed through once the work is done, and whether residents can stay in their units while it happens. Both have specific rules. - Learn [Do you need a permit to repipe a house in San Francisco?](https://hilltoprepipesanfrancisco.com/guide/san-francisco-repiping-permit/)Yes, and the permit shapes the job: who files it, which fee category applies, when the inspector comes and what the inspector looks for before a single wall is closed. - 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. - 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. ## Nearby service areas - City and County of San Francisco [Sunset and Parkside](https://hilltoprepipesanfrancisco.com/service-areas/sunset-parkside/)San Francisco Department of Building Inspection (PermitSF) permits, water from San Francisco Public Utilities Commission (SFPUC). - City and County of San Francisco [Pacific Heights and the Marina](https://hilltoprepipesanfrancisco.com/service-areas/pacific-heights-marina/)San Francisco Department of Building Inspection (PermitSF) permits, water from San Francisco Public Utilities Commission (SFPUC). - 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.