Permits Guide · San Francisco

San Francisco Planning Department vs. DBI: Understanding the Difference

By Solid Bay Construction SF | Updated 2026

San Francisco homeowners are often surprised to learn their renovation touches two entirely separate city agencies — and confusing what each one reviews is one of the most common sources of permit delay.

The Department of Building Inspection (DBI)

DBI reviews the technical, structural, and life-safety side of construction: whether the framing, electrical, plumbing, and mechanical systems meet the California Building Code. Nearly every renovation involving structural, electrical, or plumbing work needs a DBI permit, regardless of size.

The Planning Department

Planning reviews land use and neighborhood character: zoning compliance, height and setback limits, historic preservation, and — for many exterior-visible changes — whether the project fits the surrounding streetscape. Planning review is triggered specifically by things like:

• Any addition that increases the building's height or footprint
• Changes visible from the street on a building in an SF historic district or with landmark status
• New construction, demolition of more than a specified percentage of a structure, or a change in the number of dwelling units
• Projects near designated view corridors or in special use districts

When Do You Need Both?

A straightforward interior kitchen or bathroom remodel with no structural changes typically only needs DBI review. A 3rd-story addition, a rear addition that increases the footprint, or a change to a building in a historic district typically needs Planning approval before DBI issues the permit — Planning sign-off is often a prerequisite step in the DBI process, not a separate parallel track.

Why This Matters for Your Timeline

Projects requiring Planning review take meaningfully longer than DBI-only projects — sometimes several months longer, particularly if the project requires public notice or a Discretionary Review hearing. Knowing upfront which track your project falls into (and building that into your renovation timeline) avoids a very common source of surprised, frustrated homeowners mid-project.