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Why zoning research is so hard
Before you can decide what to build, you have to untangle codes written for specialists. Most people give up — or pay dearly for answers.
Codes are scattered and dense
Zoning, planning, building, ADU rules, and rent control all live in different documents — written for lawyers, full of cross-references, and rarely consistent across cities.
Expert help is slow and expensive
Planner consultations run $200–$500/hr. Architects charge thousands just to scope feasibility. And planning-department responses can take weeks.
One wrong answer kills the deal
Buy a lot you can't develop, design to the wrong setback, or miss a rent-control trigger — and you lose months and tens of thousands of dollars.
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 report
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.
See what a real analysis looks like
Download a sample report for your use case — free, no signup.
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?"