Know what you can build —
before you build it.
Instantly analyze zoning, regulations, and development potential for your property.
Takes ~60 seconds • We may follow up with insights about your property
How GoCodebook works
Three steps from address to a clear, code-accurate answer.
1. Tell us the property
Drop an address. We pull parcel, zoning, and jurisdiction details automatically.
2. Codes, decoded
GoCodebook reads zoning, planning, building, and rent-control codes that apply to your lot.
3. Custom analysis
Get a clear, plain-English answer: what you can build, what you can't, and what to do next.
What GoCodebook covers
Every layer of regulation that touches your property — in one place.
Who it's for
Homeowners
Add an ADU, remodel, or split your lot — without surprises.
Investors
Underwrite deals faster with code-accurate feasibility.
Architects
Front-load entitlement risk before drawings start.
Agents
Win listings with a real answer to "what can I build here?"
Get your free property survey
10 quick questions. We'll email you a starter feasibility summary within 1 business day.
Do you own the property?
Helps us tailor advice to your situation.
We respect your privacy. Read our privacy policy.