Plan record

County 500 Sq. Ft. Option 1

County 500 Sq. Ft. Option 1 is a pre-approved detached ADU plan from County of Fresno Department of Public Works and Planning. The public source lists it as 500 sq ft, 1 bed, and 1 bath. It originated in the Fresno County, California, USA program. This directory currently shows acceptance in Fresno County, California, USA. Source context comes from County of Fresno, last checked May 4, 2026. Use the linked provider, location, and source records to verify current acceptance before relying on the plan.

Pre-approved County of Fresno Department of Public Works and Planning Government PDF
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Source-backed summary

What public sources list

County 500 Sq. Ft. Option 1 is a pre-approved detached ADU plan from County of Fresno Department of Public Works and Planning. The public source lists it as 500 sq ft, 1 bed, and 1 bath. It originated in the Fresno County, California, USA program. This directory currently shows acceptance in Fresno County, California, USA. Source context comes from County of Fresno, last checked May 4, 2026. Use the linked provider, location, and source records to verify current acceptance before relying on the plan.

Accepted location pages

Details

Plan facts

Plan identifier
COFC-500-OPT1
Accepted locations
Status
Pre-approved
Size
500 sq ft
Bedrooms
1 bed
Bathrooms
1 bath
ADU type
Detached
Construction type
Stick built
Plan fee
$0
Estimated cost
Not listed in source
Last checked
May 4, 2026

Plan notes

Notes

Foundation notes
Not listed in source
Utility notes
County provides structural/electrical drawings; site plan and grading/drainage plan required separately. Solar/PV per 2022 California Energy Code Title 24 JA11. Septic/sewer and water supply per local conditions.
Energy notes
2022 California Energy Code, Title 24 (with JA11 Equation 150.1-C for solar PV).
Accessibility notes
Not listed in source
Permit fee notes
Plans free. Building Plan Check $278.50-$407.00, Building Construction Permit $857.37-$1,253.69 depending on size/options. Plus electrical/mechanical/plumbing permit fees, SMI fee, CA Bldg Standards Comm. Fee. School fees exempt under 500 sq ft. Regional Transportation Mitigation Fee may apply.
Cost notes
County provides plans free; construction cost estimates not published. Permit fees vary by size and trade.
Additional notes
Confirmed via partial plans PDF: 1-BEDROOM / 1-BATH. Floor area 513 sq ft conditioned + 106 sq ft covered porch = 619 sq ft total. R-3 occupancy, Type VB construction. Sprinklered: YES. Pre-approved plans designed specifically for use in Fresno County (unincorporated). Not intended for areas subject to snow load, wildfire risk, flood zones.

Source and evidence

Fresno County 500 sq ft ADU Option 1 (Partial Plans)

Government PDF
Publisher
County of Fresno
Source type
Government PDF
Reliability
Official government PDF (4/5)
Last checked
May 4, 2026
Accessed
May 4, 2026
Official source Plan page Plan document

Accepted-in locations

Accepted Locations

1 accepted location