ADU plans for Bay Area properties.

Forma helps Bay Area property owners turn an ADU idea into a coordinated design and permit-plan scope shaped around the site, intended use, and local review process.

Property review

Start with the Bay Area address, available records, existing structures, access, utilities, and your goals.

Site-specific design

Develop a layout and exterior direction around privacy, usability, lot fit, and buildability.

Permit coordination

Coordinate drawings, energy documentation, engineering, and responses needed for the agreed applicable Bay Area city or county process.

Planning an ADU in Bay Area

The Bay Area includes Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma counties, with many independent local reviewing agencies. Regional resources are a useful starting point, but the property’s city or county controls its planning and building review. Forma verifies the applicable jurisdiction and current project requirements during scope development rather than relying on a generic checklist.

Visit the applicable Bay Area city or county resource →

What to send first

The property address
Your preferred ADU type and intended use
Any existing plans, surveys, permits, or utility information
Desired room count and approximate size
Known access, easement, or existing-building issues

Local and state requirements change. This page is general information, not legal or code advice. Current requirements, fees, and feasibility must be verified for the specific property.

Start with clarity

Start an ADU in Bay Area.

Tell us the property location, project type, and what you want the space to accomplish. We’ll review the basics and outline the right next step.

Request a consultation