Evanston is increasingly ADU-friendly, with streamlined approval processes and reasonable size limits. The city's proximity to Chicago and university presence create strong housing demand.
Zoning & Size Requirements
| Allowed Zones | Single-family residential zones |
| Max Size (Detached) | 900 sq ft |
| Max Size (Attached) | 800 sq ft |
| Max Size (JADU) | Not allowed |
| Max Height | 35 feet |
| Max Units | 1 ADU per lot |
Setback Requirements
| Rear Setback | 12 feet |
| Side Setback | 3 feet |
| Front Setback | 15 feet |
| Parking Required | 1 space (optional) |
| Owner Occupancy | Not required |
| Min Lot Size | 4,000 sq ft |
Permit Process & Fees
| Approval Process | Building permit with streamlined review |
| Review Timeline | 50-70 days |
| Permit Fees | $2,500-$4,000 |
| Impact Fees | $800-$1,400 |
| Plan Check | 2-3 weeks |
| Pre-Approved Plans | Available for select types |
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Construction Costs
| Average Build Cost | $140,000-$280,000 |
| Cost per Sq Ft | $155-$310 |
| Garage Conversion | $75,000-$170,000 |
| Prefab ADU (Installed) | $105,000-$235,000 (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) | $1,500-$2,000/mo |
| Avg Rent (2 Bedroom) | $1,900-$2,700/mo |
| Short-Term Rental | Limited |
| Est. Annual ROI | 6-8% 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
- 2024: Streamlined ADU approval process
- 2023: Expanded ADU allowance in most zones
- 2024: Reduced parking requirements
- 2023: Created pre-approved ADU plan library
Tips for Building an ADU in Evanston
- Northwestern University creates strong, stable rental demand
- Suburban location offers lower costs than Chicago proper
- Pre-approved plans available; consider for time savings
- Good transit access attracts quality long-term tenants
Frequently Asked Questions
Can I build an ADU in Evanston?
Yes. ADUs are allowed in Single-family residential zones in Evanston. The maximum size for a detached ADU is 900 sq ft. No owner-occupancy is required.
How much does an ADU cost in Evanston?
ADU construction in Evanston typically costs $140,000-$280,000. Garage conversions run $75,000-$170,000, and prefab ADUs cost $105,000-$235,000 (installed).
How much can I rent an ADU for in Evanston?
Average ADU rents in Evanston are $1,500-$2,000/mo for a 1-bedroom and $1,900-$2,700/mo for a 2-bedroom unit.
Do I need parking for an ADU in Evanston?
1 space (optional). Check with Evanston planning department for the latest Illinois ADU parking rules, as many states have relaxed requirements in recent years.
How long does it take to get an ADU permit in Evanston?
The permit review timeline in Evanston is 50-70 days. Fees range from $2,500-$4,000.
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