ADU rules for Belleville
Accessory Dwelling Unit (ADU) Rules for Belleville, IL
Is your property eligible for an ADU?
# of Properties
17,910
Owner-occupied
66%
Zoning districts
33
Avg Home Value
$46,464
Median Lot Size
0.18 acres
Avg Income
$68,590
Residential Types:
17,910 housing units
Other
100%
Zoning Districts:
21,010 parcels · 33 districts
A-1
64%(13,409)
C-2
12%(2,500)
A-2
10%(1,998)
B-1
9%(1,794)
Other
6%(1,309)
ADU Rules
What can you build in Belleville, IL?
Belleville, IL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not addressed in the local bylaw
- –Detached ADU: Not addressed in the local bylaw
Max Units
- –0 per lot for accessory structures used as dwellings (prohibited)
Rental Restrictions
- –Detached ADUs prohibited; cannot be rented. Attached ADUs: license required; stays must be less than 30 consecutive days.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Illinois municipalities
Rules change at the town line. Check the municipality your property is actually in.
St. Clair County