Fresno offers some of the lowest ADU construction costs in California with growing rental demand. The city is an emerging ADU market with excellent ROI potential for investors.
Zoning & Size Requirements
| Allowed Zones | RS, RM, and all residential zones |
| Max Size (Detached) | 1,200 sq ft |
| Max Size (Attached) | 1,200 sq ft or 50% of primary dwelling |
| Max Size (JADU) | 500 sq ft |
| Max Height | 25 ft |
| Max Units | 1 ADU + 1 JADU |
Setback Requirements
| Rear Setback | 4 ft |
| Side Setback | 4 ft |
| Front Setback | Per underlying zone |
| Parking Required | No parking required |
| Owner Occupancy | Not required |
| Min Lot Size | No minimum |
Permit Process & Fees
| Approval Process | Ministerial review |
| Review Timeline | 60 days |
| Permit Fees | $2,500-$8,000 |
| Impact Fees | Waived for units under 750 sq ft |
| Plan Check | Standard review |
| Pre-Approved Plans | Limited availability |
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Construction Costs
| Average Build Cost | $80,000-$200,000 |
| Cost per Sq Ft | $120-$250 |
| Garage Conversion | $50,000-$120,000 |
| Prefab ADU (Installed) | $70,000-$180,000 (installed) |
Finance Your ADU Project
Most ADU projects are funded through HELOCs, construction loans, or cash-out refinancing. Compare rates from top lenders in minutes.
Compare ADU Financing Options →Rental Income Potential
| Avg Rent (1 Bedroom) | $1,000-$1,400/mo |
| Avg Rent (2 Bedroom) | $1,200-$1,700/mo |
| Short-Term Rental | Allowed in most areas |
| Est. Annual ROI | 9-14% annual return |
Explore Prefab ADU Options
Prefab ADUs can save 20-40% vs. traditional construction and cut build time in half. Compare top prefab manufacturers.
Compare Prefab ADUs →Recent Law Changes
What's Changed Recently
- SB 1211 (Jan 2025): Multifamily expansion
- AB 1033 (2024): Separate sale provisions
- City updating ADU ordinance (2025)
- Growing ADU builder market in Central Valley
Tips for Building an ADU in Fresno
- Fresno has the lowest build costs in California = highest ROI potential
- Large lot sizes typical in Fresno are ideal for detached ADUs
- Central Valley heat means good insulation and HVAC are essential
- Growing rental demand from UC Merced and Fresno State students
Frequently Asked Questions
Can I build an ADU in Fresno?
Yes. ADUs are allowed in RS, RM, and all residential zones in Fresno. The maximum size for a detached ADU is 1,200 sq ft. No owner-occupancy is required.
How much does an ADU cost in Fresno?
ADU construction in Fresno typically costs $80,000-$200,000. Garage conversions run $50,000-$120,000, and prefab ADUs cost $70,000-$180,000 (installed).
How much can I rent an ADU for in Fresno?
Average ADU rents in Fresno are $1,000-$1,400/mo for a 1-bedroom and $1,200-$1,700/mo for a 2-bedroom unit.
Do I need parking for an ADU in Fresno?
No parking required. Check with Fresno planning department for the latest California ADU parking rules, as many states have relaxed requirements in recent years.
How long does it take to get an ADU permit in Fresno?
The permit review timeline in Fresno is 60 days. Fees range from $2,500-$8,000.
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