ADU rules in Long Beach
The key facts first, then what we've learned building there.
The snapshot
Checked October 2026. We re-check every lot against the current code.
Long Beach
| Rule | Answer |
|---|---|
| Detached ADU size | Up to 1,200 sq ft |
| Setbacks | 4 ft side and rear |
| Height | 16 ft; 18 ft near transit; 25 ft attached |
| Pre-approved plans | Yes, the city's PAADU program: "Sevila" (800 sq ft, 2 bed, 2 bath) and "Casita" (415 sq ft, 1 bed, 1 bath) |
| Pre-approved plan permit | Over the counter at the Permit Center; can be issued the same day |
| Coastal zone | Belmont Shore, Naples and other coastal areas may need a coastal permit or waiver |
| Soils | Parts of the city are in mapped liquefaction zones, where a soils report is required |
| SB 1211 apartment ADUs | Yes |
| Utilities | SCE for electricity; Long Beach Utilities for gas and water |
| Building department | Long Beach Development Services |
What's different here
With a PAADU plan, the permit can be approved over the counter at the Permit Center, often the same day. We prepare the site package so it goes through on the first visit.
In Belmont Shore, Naples and other coastal-zone areas, an ADU may need a coastal development permit or a waiver. We check the coastal map first.
Parts of Long Beach sit in mapped liquefaction zones. There, the city wants a soils report before it issues a permit, and the foundation is designed to it.
Homes near Long Beach Airport may need sound-rated windows, doors and walls. We flag it before design.
Long Beach has its own checklist for bringing an unpermitted unit up to code. We inspect against it and draw what's needed.
What applies here
Cities must now keep a set of pre-approved ADU plans.
Learn moreSince January 2025, California lets an existing apartment property add detached ADUs, one for every existing unit up to eight, plus conversions of garages and storage.
Learn moreTurn an older unpermitted unit into a legal, rentable home.
Learn moreSB 9 lets a single-family lot be split in two, with up to two homes on each.
Learn morePlans that fit
Ready-drawn plans we adapt to your lot and your city.
Ask about your address
We check the lot against these rules and tell you what fits.