San Francisco County · San Francisco, CA
Plumbers in San Francisco, CA
San Francisco is in San Francisco County, California. About 836,000 people live in the 29 ZIP codes we cover here, in roughly 412,000 homes, 18% of them single-family detached houses. The biggest share of the housing was built before 1940 (45%), and that age decides most of what goes wrong with the plumbing.
- Same-day service when a plumber is available
- 29 ZIP codes covered
ZIP codes we cover in San Francisco
94102, 94103, 94104, 94105, 94107, 94108, 94109, 94110, 94111, 94112, 94114, 94115, 94116, 94117, 94118, 94121, 94122, 94123, 94124, 94127, 94128, 94129, 94130, 94131, 94132, 94133, 94134, 94143, 94158
San Francisco homes and their plumbing
Here is how San Francisco's homes break down by year built, based on Census estimates for the covered ZIP codes: before 1940 45%, 1940–1959 17%, 1960–1979 15%, 1980–1999 9%, 2000 or later 14%. With that many older homes, original galvanized supply pipe and cast iron or clay drains are still common, so leaks, rust and root intrusion come up often. Neighboring areas such as Daly City, Berkeley are covered too.
| Year built | Share of homes |
|---|---|
| Before 1940 | 45% |
| 1940–1959 | 17% |
| 1960–1979 | 15% |
| 1980–1999 | 9% |
| 2000 or later | 14% |
Share of housing units in the covered ZIP codes. Census ACS 2023 5-year estimates.
- Residents in covered ZIPs
- 836,321
- Housing units
- 411,542
- Single-family detached
- 18%
- Owner-occupied
- 39%
- Heated with utility gas
- 56%
- Heated with electricity
- 35%
What goes wrong in San Francisco homes
Pre-1960 homes: galvanized pipe and cast iron
62% of homes in San Francisco's covered ZIP codes were built before 1960, 45% of them before 1940. Houses that old often still have galvanized steel supply lines that rust closed from the inside, and cast iron or clay sewer pipe that cracks and lets roots in. Weak pressure at upstairs fixtures, brown water after a shutoff and slow drains are the usual clues. Typical fixes are whole-house repiping and a sewer camera inspection.
Apartments, condos and attached homes
Only 18% of homes here are single-family detached houses. In attached buildings a leak or clog often involves a shared stack or a neighbor's unit, so it's worth knowing which lines are yours and which belong to the building or HOA, and where your unit's own shutoff is.
Natural gas in most homes
56% of occupied homes here heat with utility gas, so gas water heaters, ranges and dryers are common. That means gas line extensions for new appliances, flexible connector replacements and venting checks when a water heater is swapped. If you smell gas, leave first and call the gas utility from outside. See gas line repair.
Common calls in San Francisco
- Whole-House Repiping
- Drain Cleaning
- Gas Line Repair
- Water Heater Replacement
- Main Water Line Repair
- Sewer Line Repair
Also available in San Francisco: emergency plumbing and every plumbing service.
San Francisco at a glance
- County
- San Francisco County
- Nearest city pages
- Daly City, Berkeley
- ZIP codes
- 94102, 94103, 94104, 94105, 94107, 94108, 94109, 94110, 94111, 94112, 94114, 94115, 94116, 94117, 94118, 94121, 94122, 94123, 94124, 94127, 94128, 94129, 94130, 94131, 94132, 94133, 94134, 94143, 94158
San Francisco plumbing FAQ
How old are the homes in San Francisco?
In the ZIP codes we cover around San Francisco, Census estimates put 62% of homes as built before 1960, 15% from 1960 to 1979, 9% from 1980 to 1999 and 14% in 2000 or later. The largest group is before 1940 (45%).
Who licenses plumbers in San Francisco, CA?
The Contractors State License Board (CSLB) licenses plumbing contractors under the C-36 classification, and its online lookup shows license status.
Are water heaters in San Francisco usually gas or electric?
Census data for the area show 56% of homes heating with utility gas, 35% with electricity. Water heaters often use the same fuel as the home's heat, so utility gas is the most common here, but check the label on your tank before you shop for a replacement.
I rent in San Francisco. Who pays for plumbing repairs?
About 62% of homes here are renter-occupied. In most cases the landlord is responsible for the building's plumbing, and tenants should report leaks right away and in writing. Damage a tenant causes, like a clog from something flushed, may be billed back. Your lease and California landlord-tenant law set the details.
Guides for San Francisco homeowners
Nearby areas
Also covered nearby: Brisbane (5 mi), South San Francisco (7 mi), Sausalito (8 mi), San Bruno (9 mi), Belvedere Tiburon (9 mi), Pacifica (10 mi), Alameda (10 mi), Emeryville (10 mi).
Housing, heating and population figures are US Census Bureau American Community Survey 2023 5-year estimates for the ZIP code areas we cover in San Francisco, so they may include neighboring communities that share those ZIP codes.
Need a plumber in San Francisco?
Same-day service when a plumber is available. One call connects you with a licensed plumber who serves your ZIP.