Window Replacement in San Diego, California

In the City of San Diego, replacing the windows of a detached house, duplex or townhouse may not need a building permit when the new windows go into the existing openings without changing the rough opening or the weather-resistive wall envelope, and the existing windows are not required to be fire resistive. The city's Development Services Department (DSD) handout says exterior door and window replacements are exempt if the wall and rough opening remain unchanged, while commercial properties and multifamily homes need a permit (DSD, When is a Permit Required?) ¹.

The exemption has limits. It does not apply to alterations of historical resources, to development on premises with environmentally sensitive lands that needs a development permit, or to buildings with unreinforced masonry bearing walls or exterior wall parapets, and a replacement that changes the rough opening falls outside it (San Diego Municipal Code Section 129.0203) ². The contractor license is a state matter, covered on our California window replacement page. This page covers the City of San Diego; other cities in the county, and its unincorporated areas, have their own building departments.

Permits: when a window swap is exempt

The exemption is in the Municipal Code. Section 129.0203(a)(21) says a building permit is not required for installing replacement exterior windows and doors in existing openings when all of these apply (SDMC 129.0203) ²:

• the windows are replaced in a detached one- or two-family dwelling or a townhouse, as the California Residential Code defines them;
• the replacement does not require any change to the weather-resistive exterior wall envelope;
• the existing windows are not required to be fire resistive;
• the work does not require changes to the existing rough openings.

DSD's Information Bulletin 203 restates the exemption for window openings in detached single-dwelling units, duplexes and townhouses, and says the existing windows must not be required to be fire resistive or compliant with Very High Fire Hazard Severity Zone requirements (Information Bulletin 203) ³. The bulletin also says the work must still conform with all applicable codes and standards, even if a permit is not required ³.

A full-frame replacement that removes the frame and disturbs the siding or stucco and flashing may touch the weather-resistive envelope, which the exemption excludes. An insert window that fits the existing frame is less likely to. Our article on full-frame vs insert replacement explains the difference; ask the installer which method they plan, and ask DSD if you are unsure whether it stays within the exemption. The code also says the exemption does not cover electrical, plumbing or mechanical permits, which may be required separately ².

When a permit is needed: the no-plan permit

Where a permit is required, a replacement may qualify for a no-plan building permit. Information Bulletin 203 lists replacement of doors and windows on that path when they are the same size and type as the existing ones, and only for buildings and structures that were legally permitted, constructed and passed final inspections (Information Bulletin 203) ³. The bulletin says that if the building inspector determines the work is too extensive, or cannot verify it, plans are required and a new permit is issued ³. A change in window size or type is outside that listing.

DSD's building permit page says applications are submitted online, links to the city's Accela portal and walks through the steps for a Building Construction permit application (DSD building permit page) ⁴. When the property owner obtains the permit as an owner-builder, Information Bulletin 203 says form DS-3042 must be completed and signed by the owner, and that tenants or lessees may not sign it ³. For fees, IB 203 refers to Information Bulletin 501 ³. If an installer is pulling the permit, the quote should say so and say whether the fee is included. Our article on window replacement permits explains why cities treat this differently.

Historical resources

The city's handout marks window replacement among the exemptions that do not hold in historic districts and environmentally sensitive lands, where it says permits are required (DSD, When is a Permit Required?) ¹. The Municipal Code says the same in its own terms: the exemptions in Section 129.0203 do not apply to alterations, repairs or improvements to a historical resource as described in Section 143.0220 ². Information Bulletin 203 says the exemptions do not apply when the work involves alterations, repairs or improvements to a designated historical resource, or when the building is in a designated historic district ³.

For no-plan permits, the bulletin adds a step for older houses: if the site has buildings or structures 45 years old or older, plans must be submitted to DSD for historic review unless the project is exempt under Section 143.0212, a review that typically takes about ten business days ³. Ask DSD whether this applies to your house before you set an installation date. A homeowners association is a separate matter and not part of the city's review; if you have one, check its rules.

Who may do the work

California licenses contractors through the Contractors State License Board, not the city. The license threshold, the glazing classification and the board's license lookup are on our California page. Before you sign, ask: is the installer licensed in the right classification, and does the license number on the quote match the board's record?

Title 24 and the glass

Information Bulletin 203 says exempt work must still conform with all applicable codes and standards ³, and the state Energy Code, Title 24 Part 6, sets the values for replacement windows. The California Energy Commission says buildings whose permit applications are applied for on or after January 1, 2026 must comply with the 2025 Energy Code (California Energy Commission, 2025 standards) ⁵. The U-factor and solar heat gain values for replacement windows by Title 24 climate zone are on the California page. Ask each installer which climate zone and values they used, and look for the NFRC label on each unit.

Climate and glass

ENERGY STAR places San Diego County in its South-Central climate zone (ENERGY STAR climate zone finder) ⁷. For that zone, the Version 7.0 criteria call for a U-factor of 0.28 or less and a solar heat gain coefficient (SHGC) of 0.23 or less, with air leakage of 0.3 cubic feet per minute per square foot or less (ENERGY STAR criteria) ⁶. ENERGY STAR is a voluntary label, separate from Title 24.

NOAA's 1991-2020 normals for San Diego Lindbergh Field, on the bay, describe a mild climate: a normal annual mean temperature of 64.7°F, normal heating degree days of 989.9 and cooling degree days of 893.2, about three days a year at 90°F or above, and 9.79 inches of precipitation (NOAA normals, San Diego Lindbergh Field) ⁸. With heating and cooling needs that close, both numbers on the label count: the U-factor for cool nights, the SHGC for sunny walls. Neighborhoods away from the coast may differ from the airport station. Our energy-efficient windows explainer and the article on window condensation cover how the glass behaves.

Costs

None of the cost sources we use publishes a figure for San Diego, so this page does not give a local price. As a national figure, Fixr reports that window replacement averages about $800 per window, typically $450 to $1,200 (updated January 21, 2026) (Fixr) ⁹. The window replacement cost guide sets that survey beside the others, with dates and methods.

Getting quotes

Ask every installer the same questions: insert or full-frame, whether the rough opening or wall envelope changes, whether a permit is needed and who applies, whether the house may need historic review, and which Title 24 and NFRC values the windows carry. Our guides on how to choose a window installer and how to compare window quotes cover the rest. When you are ready, you can compare quotes from window installers.

About these figures

• ¹ Official record: City of San Diego DSD handout "When is a Permit Required?" (window and door replacements exempt if wall and rough opening unchanged; permit for commercial and multifamily; permits required in historic districts and environmentally sensitive lands), checked October 26, 2026.
• ² Official record: San Diego Municipal Code Section 129.0203(a)(21) and its preamble (conditions for the window exemption; exceptions for historical resources, environmentally sensitive lands and unreinforced masonry; electrical, plumbing and mechanical permits not exempted), code dated September 2026, checked October 26, 2026.
• ³ Official record: DSD Information Bulletin 203, July 2024 (exemption conditions including Very High Fire Hazard Severity Zone, code conformance, same size and type for a no-plan permit, plans and a new permit if the work is too extensive, DS-3042, fees in Information Bulletin 501, historic review of sites with structures 45 years or older, typically ten business days), checked October 26, 2026.
• ⁴ Official record: DSD building permit page (online application through the city's Accela portal), checked October 26, 2026.
• ⁵ Official record: California Energy Commission 2025 standards page (applies to permit applications on or after January 1, 2026), checked October 26, 2026.
• ⁶ Official record: ENERGY STAR Version 7.0 criteria for the South-Central zone (U-factor 0.28, SHGC 0.23, air leakage 0.3), checked October 26, 2026.
• ⁷ Official record: ENERGY STAR county climate zone list (San Diego County in South-Central), checked October 26, 2026.
• ⁸ Official record: NOAA NCEI 1991-2020 annual normals for San Diego Lindbergh Field (64.7°F mean, 989.9 heating and 893.2 cooling degree days, 3.0 days at 90°F or above, 9.79 inches of precipitation), checked October 26, 2026.
• ⁹ Reported: Fixr national window replacement cost (about $800 per window, typically $450 to $1,200, page updated January 21, 2026), checked October 26, 2026.