Plumbing permits at LADBS: what needs one
An LADBS plumbing permit is required for much plumbing work in the City of Los Angeles, including replacing a gas water heater, unless a Certified Licensed Contractor does an equivalent swap. Many simple jobs qualify for express permits through PermitLA.
From the Plumbing Across L.A. desk. Updated .
LADBS is the Los Angeles Department of Building and Safety. Its authority stops at city limits. Inglewood, Santa Monica, Glendale, Burbank, Long Beach and Pasadena have their own departments, and unincorporated county areas go through the county. If you don't know which you're in, the neighborhood finder is a start.
Permit rules change, and this page is a reader's summary as of November 2026, not a ruling. When your job is unusual, ask LADBS before work starts.
Which plumbing jobs need an LADBS plumbing permit?
Assume yes for anything beyond small fixture repairs, then check. These are the items we could confirm from LADBS's own material.
| Job | What LADBS material says |
|---|---|
| Replace gas water heater, single-family home | Plumbing permit, unless done by a registered Certified Licensed Contractor with equivalent capacity |
| Plumbing fixtures | Covered by the Certified Licensed Contractor program |
| Domestic water piping under 50 feet | Covered by the Certified Licensed Contractor program |
| Underground water pipes, same size and material | On the express permit list |
| Domestic water re-pipe | An item on the permit list; express treatment not confirmed for a full interior repipe |
| Seismic gas shutoff valve | Permit and inspection; licensed contractor required |
Sewer work has its own track through the City's engineering bureau, including the S-permit for work in the public right-of-way. See who owns your sewer lateral. Water heater details are on the straps page, and valve rules on the seismic valve page.
What is an express LADBS plumbing permit?
It is a permit issued without plan review for routine work. The express permit bulletin lists items such as replacing water heaters and like-for-like underground water pipes. Applications go through PermitLA.
Express doesn't mean no inspection. Ask at application what inspection the job needs, and don't close up work before it happens. LADBS's homeowner steps walk through the process.
What is a Certified Licensed Contractor?
It is a licensed contractor holding a valid LADBS Certificate of Registration, which lets them do certain work without a separate permit. The bulletin on the program covers water heater replacements of equivalent capacity in gallons, BTU rating and vent capacity, plumbing fixtures, and domestic water piping under 50 feet.
If a plumber says no permit is needed on this basis, ask to see the registration and read how the exemption applies. A larger heater, or a change in venting, falls outside the equivalent swap as the bulletin describes it.
Can a homeowner pull a plumbing permit?
Sometimes, on limited terms. LADBS's owner-builder document asks for proof of ownership and residence at the address for at least 12 months. It also has restrictions, such as not more than two structures in three years and limits tied to work done before a sale.
This paper doesn't encourage that route on gas lines or service lines. A mistake there hurts people. The owner-builder path also makes you responsible for the work and for anyone you hire, so read the document closely. Gas work is a job for a licensed plumber.
Why bother with a permit on a small job?
Because a permit brings an inspection and a record. Sellers in Los Angeles deal with a Residential Property Report and a string of sale-time requirements. A buyer who asks about the new heater will want paperwork. City rebates also depend on it: LASAN's sewer repair rebate requires a final permit signed by a City inspector no more than 60 days before you apply.
Under California rules, the contract must say who gets the permits. Be wary of anyone suggesting you skip a required one. The handyperson exemption, for one, doesn't cover jobs that need a permit.
What this means by age of house
- Before 1930Long-ago changes in these houses may never have had a permit. Ask LADBS what records it holds before you plan work. See before 1930.
- 1930s–1940sEarlier repairs may not match today's code, and an inspector looks at the work in front of them. Ask how far a new job reaches. See the 1930s and 1940s.
- 1950s–1960sHeater swaps and slab reroutes are common here. Check that past work has permits, especially if you're about to sell.
- 1970s and newerNewer doesn't change what needs a permit. Check records anyway, since heater replacements are easy to find undocumented.
Questions that come up
Does any of this apply in Burbank?
Not directly. Burbank has a building department of its own, as do the other separate cities around Los Angeles. Ask yours.
Does the permit fee go on the contractor's bid?
It depends on the contract. CSLB says a contract needs written direction on who gets necessary permits, so check who is applying and who pays.
Does changing a faucet need a permit?
LADBS material lists plumbing fixtures under the Certified Licensed Contractor program. For a simple like-for-like swap, ask LADBS if you're unsure.
What happens if earlier work had no permit?
Ask LADBS what is needed to legalize it. A licensed contractor can help you read the answer before you sell or remodel.
Is a plumbing permit from LADBS good in the whole county?
No. It applies inside the City of Los Angeles only.
Who handles this
- LADBSPlumbing permits and inspections, this city only
- CSLBConfirming a license and reading contract rules
- Bureau of Engineering, City of Los AngelesS-permits for sewer work in the public right-of-way
What this was checked against
- Permit application information: LADBS
- Express permits bulletin: LADBS
- Certified Licensed Contractor bulletin: LADBS
- Owner-builder permits: LADBS
- Homeowner step by step: LADBS
- Who gets permits under a contract: State licensing board
Sources read in November 2026. Rules and prices change: check the agency before you act.