What an ADU costs in Torrance (2026)
Torrance runs its own permits at the city Permit Center. Here are typical numbers, the local rules, and your next step.
Typical ADU numbers in Torrance
- A 750 sq ft backyard ADU with a standard finish costs about $300,000 to build, all in: building, site work, city fees and design.
- Typical ADU rent: about $4,900 a month for 750 sq ft.
- Home value nearby: about $1,100 per sq ft (Westside and South Bay area).
Run the free ADU and new home cost calculator for Torrance
ADU permits and local rules in Torrance
Who runs permits
City of Torrance Community Development, Permit Center at 3031 Torrance Blvd.
Pre-approved ADU plans
Yes. Torrance lists 2 pre-approved ADU plans (about 750 and 800 sq ft, 2 bedrooms). You buy them from the designer. Grading, solar and sprinkler permits are separate.
What can slow you down
- Some lots near Palos Verdes are hillside.
- Ask us about any rules for your street.
Sources: City of Torrance pre-approved ADU page. State ADU law. General information, not legal advice. Updated October 2026.
Free lot check in Torrance
Send Hemisphere A&E your address. We look up your zoning and lot size, what fits (ADU, junior ADU, SB 9, new home, apartments, remodel or business space), red flags like fire zones or hillside rules, and a rough cost range. No cost, no pressure. Email info@hemisphereae.com or call (619) 762-7144.
More cost guides for Torrance
- What a new home costs in Torrance
- What a restaurant, shop or office build-out costs in Torrance
- What an apartment building costs in Torrance
Cost guides for more of LA County
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