ADU STACK

Fit Your ADU

See an ADU on your lot.

Enter your address. We pull your lot lines from county records, find your house, and place an ADUStack plan in your backyard on a satellite map. Drag it and rotate it to try your own layout.

Lot lines are available in Santa Clara, Alameda, and Contra Costa counties. Anywhere else, you can still place an ADU on the satellite view.

Enter your address above to load your lot.

How the fit check works

The green area is where an ADU can go after standard setbacks: 4 ft from side and rear lot lines (California's standard for detached ADUs), 20 ft from the street-side lot line, and 6 ft from your house and other buildings. Plan footprints are approximate (about 24 × 31 ft for 749 sq ft and 30 × 40 ft for 1,199 sq ft) until floor plans are final. Lot lines come from county parcel records, building outlines from OpenStreetMap, and imagery from Esri; all can be off by a few feet. This isn't a survey and doesn't check easements, trees, slope, utilities, fire zones, or city-specific rules. Your site review confirms all of that.