What an ADU costs in South Pasadena (2026)
South Pasadena runs its own ADU permits and is a small city with many older homes. Here are typical numbers, the local rules, and your next step.
Typical ADU numbers in South Pasadena
- 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 South Pasadena
ADU permits and local rules in South Pasadena
Who runs permits
City of South Pasadena Community Development: the Planning Division and Building Division.
Pre-approved ADU plans
The city is building a pre-approved ADU plan program with three planned sizes. It was still taking public input in 2026. Ask us for the latest.
What can slow you down
- Historic homes and districts may need extra review.
- Old homes often need power and sewer upgrades.
- Mature trees on the lot can limit where the ADU goes.
Sources: City of South Pasadena news release on the Pre-Approved ADU Plan Program (March 2026). State ADU law. General information, not legal advice. Updated October 2026.
Free lot check in South Pasadena
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.
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