ADU rules in Torrance
The key facts first, then what to plan for on a lot there.
The snapshot
Checked November 2026 against the city's own ADU pages. We re-check every lot against the current code.
Torrance
| Rule | Answer |
|---|---|
| Local ordinance | Updated October 2025. Where it differs from state law, state law applies |
| Detached ADU size | State rule: up to 1,200 sq ft. The city's own standards table was not yet posted when we checked |
| Junior ADU | Up to 500 sq ft inside the house or an attached garage; a recorded covenant is required before anyone moves in |
| Short-term rental | Not allowed: no rentals under 30 days |
| Pre-approved plans | Yes: 4 detached one-story plans from two designers, from a 440 sq ft studio to a 798 sq ft two-bedroom, bought from the plan owner |
| Using a pre-approved plan | About 80% complete. It still needs site-specific work, a building permit and any grading, solar or sprinkler permits |
| Coastal zone | ADUs in the Coastal Zone may be subject to Coastal Commission review |
| Hillside overlay | Projects in the Hillside Overlay need an exemption or a Precise Plan |
| How to apply | A preliminary plan goes to Planning first; permits are filed online through the Citizen Access Portal |
| Building department | Community Development: Planning Division and Building & Safety |
What's different here
Torrance asks for a preliminary plan to Planning before the building permit submittal. We prepare that set and take it in.
The city lists four detached plans, sold by their designers and about 80% complete. We check whether one suits your lot before drawing a custom plan.
Near the coast, the Coastal Commission may review the project. In the Hillside Overlay there is an extra approval step. We find out which applies to your address.
Since January 2026 plan reviews and permit submittals are electronic only.
What applies here
Cities must now keep a set of pre-approved ADU plans.
Learn moreUp to 500 sq ft carved out of the house you have.
Learn moreThe garage becomes a home. No new setbacks, no replacement parking.
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 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.