The California Environmental Quality Act (CEQA) requires state and local agencies to evaluate the environmental impacts of projects they approve. For development projects, this means the city or county must conduct a CEQA review before approving your entitlement or permit application. A full CEQA review — an Environmental Impact Report (EIR) — can take 12 to 24 months and cost $100,000 to $1,000,000 or more. A Mitigated Negative Declaration (MND) takes 6 to 12 months and costs $20,000 to $100,000.

But many projects qualify for a CEQA exemption, which allows the agency to approve the project without any environmental review. Understanding the exemption categories and their requirements is one of the most valuable things a developer can do to protect schedule and budget.

Two Types of Exemptions

Statutory Exemptions (CEQA Guidelines Section 15260-15285)

Statutory exemptions are established by the legislature in the CEQA statute itself. If a project meets the statutory criteria, it is exempt regardless of its environmental impacts. The agency has no discretion to require additional review.

Key statutory exemptions for development projects:

  • Ministerial projects (Section 15268) — projects that require only the application of fixed standards without the exercise of discretion. Building permits for projects that conform to the zoning code and building code are ministerial. The key test is whether the agency has any discretion to deny the permit for reasons other than code compliance.
  • Emergency projects (Section 15269) — projects to prevent or mitigate an emergency. This covers emergency repairs to utilities, roads, and structures damaged by natural disasters or other emergencies.
  • SB 35 streamlined projects (Government Code 65913.4) — qualifying multifamily housing projects in jurisdictions that have not met their housing production targets. SB 35 provides ministerial approval, which is exempt from CEQA.

Categorical Exemptions (CEQA Guidelines Sections 15301-15333)

Categorical exemptions are established by the CEQA Guidelines for classes of projects that the Secretary of Resources has determined generally do not have a significant effect on the environment. The agency must make a finding that the specific project fits within the category and that no exceptions apply.

Key categorical exemptions for development projects:

  • Class 1 (Section 15301) — Existing Facilities. Operation, repair, maintenance, and minor alteration of existing structures involving negligible expansion. This covers interior remodels, exterior changes that do not expand the building, and additions up to 10,000 SF if the project is in an area where all public services and facilities are available.
  • Class 3 (Section 15303) — New Construction of Small Structures. New construction of up to three single-family residences in an urbanized area; a duplex or similar multifamily residential structure totaling up to four units in an urbanized area; a commercial structure of up to 10,000 SF on a site zoned for the use and served by utilities.
  • Class 32 (Section 15332) — In-Fill Development. Infill development on a site of no more than 5 acres, substantially surrounded by urban uses, consistent with the general plan and zoning, with no significant environmental effects. This is the most commonly used categorical exemption for urban development projects.

Class 32 In Detail

Class 32 is worth understanding in detail because it covers a wide range of urban development projects. To qualify, all of the following must be true:

  1. The project is consistent with the applicable general plan and zoning designations. No general plan amendment or rezoning is required.
  2. The site is no more than 5 acres and substantially surrounded by urban uses.
  3. The site has no habitat for endangered, rare, or threatened species.
  4. Approval would not result in significant effects relating to traffic, noise, air quality, or water quality.
  5. The site can be adequately served by all required utilities and public services.

Most urban infill projects on parcels under 5 acres meet these criteria. The critical question is usually item 4 — whether the project has significant traffic, noise, or air quality impacts. A 50-unit apartment building on a busy urban street probably does not have significant impacts above and beyond what the general plan already anticipated. A 200-unit project on a quiet residential street might.

The Exceptions

Even if a project fits within a categorical exemption, the exemption does not apply if any of the following exceptions exist (CEQA Guidelines Section 15300.2):

  • Cumulative impact: The project, combined with successive projects of the same type in the same area, may result in significant cumulative impacts.
  • Significant effect: There is a reasonable possibility that the project will have a significant effect on the environment due to unusual circumstances.
  • Scenic highway: The project may damage scenic resources along a designated state scenic highway.
  • Hazardous waste site: The project is on a site listed on the Cortese List (hazardous waste and substance sites).
  • Historical resource: The project may cause a substantial adverse change in the significance of a historical resource.

The "unusual circumstances" exception is the most commonly litigated. Project opponents argue that the specific project has unusual features (contaminated soil, steep terrain, proximity to sensitive receptors) that take it outside the scope of the categorical exemption. This is a fact-specific determination, and the agency must exercise judgment in evaluating it.

The Process

A CEQA exemption is not a permit. It is a finding by the agency that the project is exempt from CEQA review, documented in a Notice of Exemption (NOE) filed with the county clerk. The NOE starts a 35-day statute of limitations for legal challenges. If no challenge is filed within 35 days, the exemption is final.

If the project does not qualify for an exemption, the next step is an Initial Study (IS), which determines whether the project may have significant environmental impacts. If no significant impacts are found, the agency prepares a Negative Declaration (ND). If significant impacts are found but can be mitigated, the agency prepares a Mitigated Negative Declaration (MND). If significant impacts cannot be mitigated, a full EIR is required.

The CEQA determination should be made as early as possible — ideally during the pre-application meeting with the planning department. If your project qualifies for an exemption, confirm it in writing with the planner and proceed. If it does not, budget for the time and cost of the IS/MND or EIR process.