City of Cupertino pre-approved ADU plans
The pre-approved ADU plans City of Cupertino publishes, copied as published, with a link to the official page and the date A-du last checked it.
Pre-approved ADU plans
City of Cupertino
6 plans in the index
A-du last checked the official page on November 3, 2026.
The plans
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.
476 sq. ft. 1 bedroom and 1 bathroom ADU / J. Kretschmer Architect
- Description:
- 476 sq. ft. 1 bedroom and 1 bathroom ADU
- Bedrooms:
- 1
- Bathrooms:
- 1
- Designer:
- J. Kretschmer Architect
- Status:
- No status label on the agency page
The agency page says: “This preapproval program applies only to detached ADUs. All pre-approved plans are still subject to any site concerns.”
Listed on the agency page when A-du checked it on November 3, 2026.
495 sq. ft. 1 bedroom & 1 bathroom ADU / APEX HOMES USA INC
- Description:
- 495 sq. ft. 1 bedroom & 1 bathroom ADU
- Bedrooms:
- 1
- Bathrooms:
- 1
- Designer:
- APEX HOMES USA INC
- Status:
- No status label on the agency page
The agency page says: “This preapproval program applies only to detached ADUs. All pre-approved plans are still subject to any site concerns.”
Listed on the agency page when A-du checked it on November 3, 2026.
499 sq. ft. 1 bedroom and 1 bathroom ADU / Basically Homes, Powered by Vitalize Build Construction
- Description:
- 499 sq. ft. 1 bedroom and 1 bathroom ADU
- Bedrooms:
- 1
- Bathrooms:
- 1
- Designer:
- Basically Homes, Powered by Vitalize Build Construction
- Status:
- No status label on the agency page
The agency page says: “This preapproval program applies only to detached ADUs. All pre-approved plans are still subject to any site concerns.”
Listed on the agency page when A-du checked it on November 3, 2026.
674 sq. ft. 2 bedrooms and 1 bathroom ADU / ADORE Homes ADU
- Description:
- 674 sq. ft. 2 bedrooms and 1 bathroom ADU
- Bedrooms:
- 2
- Bathrooms:
- 1
- Designer:
- ADORE Homes ADU
- Status:
- No status label on the agency page
The agency page says: “This preapproval program applies only to detached ADUs. All pre-approved plans are still subject to any site concerns.”
Listed on the agency page when A-du checked it on November 3, 2026.
749 sq. ft. 2 bedroom & 2 bathroom ADU / APEX HOMES USA INC
- Description:
- 749 sq. ft. 2 bedroom & 2 bathroom ADU
- Bedrooms:
- 2
- Bathrooms:
- 2
- Designer:
- APEX HOMES USA INC
- Status:
- No status label on the agency page
The agency page says: “This preapproval program applies only to detached ADUs. All pre-approved plans are still subject to any site concerns.”
Listed on the agency page when A-du checked it on November 3, 2026.
991 sq. ft. 2 bedroom & 2 bathroom ADU / APEX HOMES USA INC
- Description:
- 991 sq. ft. 2 bedroom & 2 bathroom ADU
- Bedrooms:
- 2
- Bathrooms:
- 2
- Designer:
- APEX HOMES USA INC
- Status:
- No status label on the agency page
The agency page says: “This preapproval program applies only to detached ADUs. All pre-approved plans are still subject to any site concerns.”
Listed on the agency page when A-du checked it on November 3, 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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