What an ADU costs in Arcadia (2026)
Arcadia runs its own ADU permits and has a city list of pre-approved ADU plans. Here are typical numbers, the local rules, and your next step.
Typical ADU numbers in Arcadia
- 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 $4,300 a month for 750 sq ft.
- Home value nearby: about $850 per sq ft (Close-in area).
Run the free ADU and new home cost calculator for Arcadia
ADU permits and local rules in Arcadia
Who runs permits
City of Arcadia Development Services: the Planning Division and Building Division, through the Arcadia EDGE online portal.
Pre-approved ADU plans
Yes. Arcadia's Pre-Approved ADU (PAADU) program skips planning review for detached ADUs. One listed plan is a 1,000 square foot, 2-bedroom unit.
What can slow you down
- Pre-approved plans can't be used in the Very High Fire Hazard zone without extra fire details.
- Pre-approved plans can't be changed, or they need a full new review.
- Some neighborhoods have homeowner design review boards.
Sources: City of Arcadia Pre-Approved ADU (PAADU) Programs page. State ADU law. General information, not legal advice. Updated October 2026.
Free lot check in Arcadia
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 Arcadia
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