California ADU permits · Sacramento & Santa Rosa · ministerial by state law
California gives cities 60 days to decide an ADU permit (Gov. Code §66317). The mechanical work — completeness, setbacks, heights, document checks — takes Greenlight minutes, cited to the exact code section. People keep the judgment. Housing gets built.
355 encoded rules · 90% cited to source · across 2 jurisdictions, 2 permit types
See what we coverFor builders & homeowners
Start from your parcel. Greenlight pre-fills what it can — always showing its source — explains every field in plain language with the code section behind it, and won't let an incomplete application out the door.
Enter the builder portalFor city reviewers & officials
Every submission arrives pre-checked: verdict, evidence, and verbatim citation on every rule. Your judgment goes where it's needed — concur, override, and sign.
Open the review consoleBefore you start
No account, nothing to install. Filling in the application takes about 10–35 minutes once you have your project facts on hand — and your draft saves automatically, so you can stop and come back anytime. The one thing worth gathering first is your document set; we'll show you exactly which documents apply to your project before you upload anything.
Your parcel
The address or APN of the lot. We screen it against the rules before you fill in anything else.
Your project facts
About 22–68 answers — size, setbacks, who's building. Each field explains itself, with the code section behind it.
Your documents
Plans and supporting files, organized as 3 groups. We list the exact set before the upload step.
Don't have your plans yet? You can still start — fill in what you know, and come back with the plan set when a designer has drawn it. Nothing is lost.
How it works
The application mirrors each city's own intake packet, field for field, and the completeness check runs before you submit — so an incomplete-submittal notice simply can't happen.
Deterministic rule checks cover every objective standard — setbacks, height, size, zone — each one citing the exact code section. No black box, no guesses.
Greenlight recommends; a certified reviewer decides. Judgment-tier items are flagged as questions, never auto-decided. The full audit trail is one query away.
Don't take the claims on faith — the demo is seeded:
Browse every encoded rule, cited See a signed determination