Start with the right permit authority
Check the jurisdiction for the installation address before applying. This guide concerns the City of San Diego. A county property or another incorporated city can have a different process even when the mailing address is familiar.
Have the existing and proposed heater type, fuel and location ready. Also identify the property as a house, duplex or larger building. Those details make the permit question specific enough to answer.
Tank replacement and tankless work follow different routes
The city’s simplified plumbing/gas permit guidance includes replacement water heaters but excludes tankless types. It directs single-family and duplex projects to the Simple No-Plan Combination Permit application. Check the appropriate route before purchasing equipment.
| Your project | Ask before proceeding |
|---|---|
| Storage tank replacement | Is the proposed work eligible for the simplified route, and which property-type application applies? |
| Tankless replacement or conversion | Which application covers this work, and what equipment or installation details are needed? |
| Fuel change, relocation or electrical work | Does the full project require additional review or associated permits? |
| Shared or larger building | Who coordinates building access, shutdowns, approvals and the permit application? |
Include permit and inspection responsibilities in the quote
Agree who applies, pays the fees, keeps the permit reference and schedules inspection. The city says inspection scheduling follows payment and permit issuance. Its published processing estimate is not a promise that an installer will be available or that the whole job will finish within that period.
Ask what the quote excludes and how any required correction work will be approved. Keep the equipment details, invoice, warranty documents and inspection record together when the job is complete.
Compare the installed work, not only the heater
A suitable like-for-like replacement can involve less change than a conversion. The installer still needs to check the existing connections and the new model’s requirements. For tankless work, ask about gas or electrical capacity, approved venting and any condensate needs.
- Equipment: exact model, fuel and capacity, with demand checked against the household
- Connections: included gas, electrical, venting, valve and drainage work
- Access: removal route, workspace protection and disposal of the old unit
- Approvals: permit fees, inspection arrangements and any excluded work
- Support: equipment warranty and installer labour warranty, stated separately
Use the gas-versus-electric installation cost guide and tankless comparison to check the scope. The cost planner shows national published ranges; it is not a San Diego price quote.
Check current California requirements
The 2025 California Energy Code applies to permit applications submitted from January 1, 2026. The appropriate replacement requirements depend on the project. Read the California guide and ask the responsible authority which rules apply to the address.
Before agreeing to work, use the California contractor licence lookup to check the responding contractor. Confirm the written scope and terms directly. This page provides local guidance; it does not establish that a provider is available for the property.
San Diego installation questions
Does a replacement water heater use San Diego’s simple permit route?
The city includes ordinary water-heater replacements in its simplified plumbing/gas route. Confirm the application for the property type and the actual work before proceeding.
Does the tankless exception mean a permit is not needed?
No. Tankless work is excluded from that simplified route. Ask Development Services which application and supporting information your project needs.
Is a house or duplex treated the same as an apartment building?
The city directs single-family and duplex applicants to its combined no-plan application. Do not assume that instruction covers a larger multifamily building.
What should I ask the plumber before approving the quote?
Confirm the model, fuel, installation location, included work, exclusions, permit responsibility and inspection arrangements. Ask how any unexpected work will be priced and approved.
Does a San Diego mailing address establish the permit authority?
Check the property’s actual jurisdiction. A postal city name does not establish whether the City of San Diego, the county or another city handles the permit.
Primary local source: City of San Diego Development Services, checked October 6, 2026. Confirm the current application and requirements before work begins.