Use cases

Screen a lot for ADU constraints

Use GIS to spot flood, fire, slope, and overlay issues before designing an ADU. Confirm objective standards with the local ADU handout.

Updated 2026-08-29

Screen a parcel Open glossary

Useful sources for searching: Official sources to verify buildability ↓

Pair with state guidance

HCD publishes statewide ADU information; local agencies publish checklists.

People also ask

Does zoning RR allow ADUs?

Often yes under state law, subject to local objective standards and site constraints.

Official sources

Last verified 2026-08-29. Re-check agency maps before decisions — vintages change.

Related

ADU guide

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.

Screen a parcel View sample report