What is CEQA and when does it apply to my remodel?

The California Environmental Quality Act, codified at Public Resources Code Sections 21000-21189, requires environmental review whenever a public agency takes a discretionary action approving a project that may have a significant environmental impact. For most single-family residential remodels in San Francisco the answer is short: the project qualifies for a categorical exemption and review is administrative rather than substantive.

The two exemptions that carry almost all SF residential work are CEQA Guidelines Section 15301 (Class 1, existing facilities — interior and exterior alterations to an existing structure with no expansion of use) and Section 15303 (Class 3, new construction or conversion of small structures, including up to three single-family residences in an urbanized area). SF Planning processes these as Class 1 or Class 3 categorical-exemption determinations, often on the same form as the building permit.

The friction starts when one of the exemption exceptions in Guidelines Section 15300.2 applies. The four most common SF triggers are: location — a project on a parcel within a designated historic district or near an environmental resource; cumulative impact — successive projects of the same type producing a meaningful aggregate effect; unusual circumstances — anything that makes the project arguably non-typical; and historical resources — any work on a parcel rated 1, 2, or 3 on the SF Planning Department historic-resource survey under Article 10 or Article 11 of the Planning Code.

When an exception applies, the project gets bumped to either an Initial Study leading to a Negative Declaration, a Mitigated Negative Declaration, or, in the rare residential case, a full Environmental Impact Report. The timeline impact ranges from 3 months for a clean Negative Declaration to 12-18 months for a contested EIR. Coastal-zone parcels on Ocean Beach also pull in California Coastal Commission jurisdiction under the Coastal Act, which adds its own review track. The single best derisking step early in design is pulling the parcel historic-resource rating before committing to a scope of work.