County of Orange (unincorporated) pre-approved ADU plans
The pre-approved ADU plans County of Orange (unincorporated) publishes, copied as published, with a link to the official page and the date A-du last checked it.
Pre-approved ADU plans
County of Orange (unincorporated)
6 plans in the index·6 on A-du Build
A-du last checked the official page on November 2, 2026.
The plans
Price on claim
Build $340k to $583k
Price on claim
Build $420k to $720k
Price on claim
Build $195k to $335k
Price on claim
Build $138k to $236k
Price on claim
Build $262k to $449k
Price on claim
Build $280k to $480k
A-du is not affiliated with HCD or any city or county. This page copies what each agency publishes about its pre-approved ADU plans and links to the official page. Check the agency's page before you rely on anything here. Nothing on this page is legal advice.
Each plan as the agency publishes it
The details below are copied from the agency’s own pages, field by field, with the date A-du last checked each plan.
3 Bedroom Plan 3A
- Description:
- 3 Bedroom Plan 3A - 972 s.f.
- Size:
- Three-bedroom (2ba): 972 Sqft
- Bedrooms:
- Three-bedroom
- Bathrooms:
- 2ba
- Designer:
- Design Path Studio
- Status:
- No status label on the agency page
- Code cycle:
- The available plans currently reflect the 2022 California Building Code Standards. (program page)
The agency page says: “(FOR USE IN THE UNINCORPORATED COUNTY OF ORANGE)”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
3 Bedroom Plan 3B
- Description:
- 3 Bedroom Plan 3B - 1200 s.f.
- Size:
- Three-bedroom (2ba): 1,200 Sqft
- Bedrooms:
- Three-bedroom
- Bathrooms:
- 2ba
- Designer:
- Design Path Studio
- Status:
- No status label on the agency page
- Code cycle:
- The available plans currently reflect the 2022 California Building Code Standards. (program page)
The agency page says: “(FOR USE IN THE UNINCORPORATED COUNTY OF ORANGE)”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
One-bedroom (1ba): 558 Sqft / Design Path Studio
- Description:
- 1 Bedroom Plan - 558 s.f.
- Size:
- One-bedroom (1ba): 558 Sqft
- Bedrooms:
- One-bedroom
- Bathrooms:
- 1ba
- Designer:
- Design Path Studio
- Status:
- No status label on the agency page
- Code cycle:
- The available plans currently reflect the 2022 California Building Code Standards. (program page)
The agency page says: “(FOR USE IN THE UNINCORPORATED COUNTY OF ORANGE)”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
Studio: 393 Sqft / Design Path Studio
- Description:
- Studio Plan - 393 s.f.
- Size:
- Studio: 393 Sqft
- Bedrooms:
- Studio
- Designer:
- Design Path Studio
- Status:
- No status label on the agency page
- Code cycle:
- The available plans currently reflect the 2022 California Building Code Standards. (program page)
The agency page says: “(FOR USE IN THE UNINCORPORATED COUNTY OF ORANGE)”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
Two-bedroom (1ba): 748 Sqft / Design Path Studio
- Description:
- 2 Bedroom 1 Bath Plan - 748 s.f.
- Size:
- Two-bedroom (1ba): 748 Sqft
- Bedrooms:
- Two-bedroom
- Bathrooms:
- 1ba
- Designer:
- Design Path Studio
- Status:
- No status label on the agency page
- Code cycle:
- The available plans currently reflect the 2022 California Building Code Standards. (program page)
The agency page says: “(FOR USE IN THE UNINCORPORATED COUNTY OF ORANGE)”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
Two-bedroom (2ba): 800 Sqft / Design Path Studio
- Description:
- 2 Bedroom 2 Bath Plan - 800 s.f.
- Size:
- Two-bedroom (2ba): 800 Sqft
- Bedrooms:
- Two-bedroom
- Bathrooms:
- 2ba
- Designer:
- Design Path Studio
- Status:
- No status label on the agency page
- Code cycle:
- The available plans currently reflect the 2022 California Building Code Standards. (program page)
The agency page says: “(FOR USE IN THE UNINCORPORATED COUNTY OF ORANGE)”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
Getting a plan permitted
A pre-approved plan still needs a building permit for your lot. For free plans published by a California city or county, you can request an optional flat-fee service, Permitting by Chris Koss, AIA. Chris Koss, AIA, a California-licensed architect who owns A-du, provides this permitting service personally under a separate written agreement with you (the Permitting Services Agreement). It is not performed by A-du, and A-du takes no part of his fee. You can always take a free plan straight to your building department instead. Open any plan on A-du Build to see what applies to it.
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