City of Garden Grove pre-approved ADU plans
The pre-approved ADU plans City of Garden Grove 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 Garden Grove
4 plans in the index·4 on A-du Build
A-du last checked the official page on November 2, 2026.
The plans
Free plan
Build $156k to $268k
Free plan
Build $220k to $378k
Free plan
Build $262k to $450k
Free plan
Build $350k to $600k
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.
ADUGO-CP-1
- Size:
- Unit Size: 447 sf
- Bedrooms:
- 0 (studio)
- Bathrooms:
- 1
- Designer:
- Not named on the agency page
- Status:
- No status label on the agency page
- Code cycle:
- 2022 CALIFORNIA BUILDING CODE (plan title sheet)
The agency page says: “Note: To use Pre-Approved ADU plans, the property may not be located in a Special Flood Hazard Area (Flood Zone "A")”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
ADUGO-CP-2
- Size:
- Unit Size: 630 sf
- Bedrooms:
- 1
- Bathrooms:
- 1
- Designer:
- Not named on the agency page
- Status:
- No status label on the agency page
- Code cycle:
- 2022 CALIFORNIA BUILDING CODE (plan title sheet)
The agency page says: “Note: To use Pre-Approved ADU plans, the property may not be located in a Special Flood Hazard Area (Flood Zone "A")”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
ADUGO-CP-3
- Size:
- Unit Size: 750 sf
- Bedrooms:
- 2
- Bathrooms:
- 2
- Designer:
- Not named on the agency page
- Status:
- No status label on the agency page
- Code cycle:
- 2022 CALIFORNIA BUILDING CODE (plan title sheet)
The agency page says: “Note: To use Pre-Approved ADU plans, the property may not be located in a Special Flood Hazard Area (Flood Zone "A")”
Agency page for this planSee it on A-du Build
Listed on the agency page when A-du checked it on November 2, 2026.
ADUGO-CP-4
- Size:
- Unit Size: 1,000 sf
- Bedrooms:
- 3
- Bathrooms:
- 2
- Designer:
- Not named on the agency page
- Status:
- No status label on the agency page
- Code cycle:
- 2022 CALIFORNIA BUILDING CODE (plan title sheet)
The agency page says: “Note: To use Pre-Approved ADU plans, the property may not be located in a Special Flood Hazard Area (Flood Zone "A")”
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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