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Gas Line Repair in San Francisco, CA
Most of San Francisco is on the gas main: 56% of households. That means a meter on the wall and a service line under the ground, and a boundary between them that federal rules put in a specific place.
Read this first
Responsibility changes hands at the meter outlet. The line under the ground between the street and the meter is the utility's up to that point, and the yard line and house piping after it are the property owner's. 56% of homes in San Francisco heat with utility gas.
Source: US Census Bureau, American Community Survey table B25040; the service line boundary is 49 CFR § 192.3.
If you smell gas right now
Leave the building on foot. Do not use a phone or a light switch inside. Call 911 and your gas utility from somewhere else, and do not call us — we are a referral service, not an emergency line. The full list, in order.
How San Francisco is supplied
A buried run from the street to a meter, and piping onward through the property. Federal rules end the service line at the meter outlet; what comes after is customer piping.
The piping people forget they own is the buried run from the meter to a detached garage, a grill or a pool heater. That is theirs, and it may not be marked when somebody comes to locate lines.
| Households in San Francisco | Share |
|---|---|
| Utility (mains) gas | 56% |
| Bottled or tank propane | 2% |
| Electricity | 35% |
| Fuel oil and kerosene | under 1% |
| Wood and everything else | 7% |
Source: US Census Bureau, American Community Survey 5-year estimates, table B25040 (house heating fuel), 2023 release. Universe: 361,770 occupied housing units. B25040 records what heats the house, which is the best available guide to whether a property has mains gas or a tank — it does not count service lines directly. Service line definition: 49 CFR § 192.3, via PHMSA interpretation PI-12-0003.
Across California as a whole, 65% of households are on mains gas and 2% on tank propane. San Francisco sits 9 points below the state on mains and about level with it on propane. A state figure would flatten exactly that difference, which is the reason these pages are built town by town instead.
Before anyone digs on the property
A locate before digging is free, and PHMSA is unambiguous about the value — excavation damage is the leading cause of pipeline incidents and calling 8-1-1 first avoids one 99 times in a hundred. The gap to ask about is private buried line, which a standard locate may not mark.
Source: PHMSA, 811 Day.
What to ask whoever quotes it
Ask how the work will be tested and what happens at the end of it. An inspection on gas work is normal rather than a complication, and a contractor who treats it as one is telling you something.
Other California towns we route in
- Belvedere Tiburon 75% mains gas · 1% tank propane
- Claremont 81% mains gas · 1% tank propane
- San Clemente 74% mains gas · 2% tank propane
- Mentone 76% mains gas · 2% tank propane
- Martinez 70% mains gas · 2% tank propane
Checking a plumber in California
California licenses are issued by the Contractors State License Board, which publishes a public search you can use before work begins. California licenses the C-36 plumbing contractor; there is no state journeyman license.
Gas work is separately permitted and separately licensed in most jurisdictions, so ask specifically about gas rather than plumbing in general.
For repair work, not for a suspected leak.If you can smell gas, leave and call 911 or your utility from outside; this is the wrong number for that. For everything else — a line, a meter, an appliance connection — we will route you to a contractor covering your area, free of charge to you. Gas is one part of what San Francisco calls us about.
Call (888) 752-8038