Useful sources for searching: Official sources to verify buildability ↓
State baseline vs local rules
HCD guidance summarizes statewide ADU statutes. Local agencies publish objective standards and submittal checklists.
GIS screens that matter
Floodplains, very high fire zones, steep slopes, easements, and septic capacity can block or reshape an ADU even when zoning allows one.
Next verification steps
Confirm sewer/water or septic, parking rules, and whether the lot is in a historic district or coastal zone.
People also ask
Does state law guarantee an ADU on every lot?
No. Lots must still meet health, safety, and applicable objective standards.
Is Parcel View an ADU approval?
No. It is informational screening with source links for your follow-up with planning.
Official sources
Last verified 2026-08-29. Re-check agency maps before decisions — vintages change.
Related
Screen this on a California parcel
Parcel View checks official public GIS for zoning, flood, fire, soils, and planning — every finding linked to the source.