ADUs are allowed in Granite CityTypes:Internal
Types:Internal
Accessory Dwelling Unit (ADU) Rules for Granite City, IL
Is your property eligible for an ADU?
# of Properties
12,331
Owner-occupied
67%
Zoning districts
24
Avg Home Value
$32,181
Median Lot Size
0.16 acres
Avg Income
$59,206
Residential Types:
12,331 housing units
Apts (4+ units)
9%
Condos
2%
Other
88%
Zoning Districts:
13,709 parcels · 24 districts
R-3
40%(5,470)
R-2
30%(4,121)
R-1
13%(1,757)
C-4
3%(419)
Other
14%(1,942)
ADU Rules
What can you build in Granite City, IL?
Granite City, IL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: Not permitted
Max Units
- –0 ADUs per lot (municipality-wide)
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –ADUs prohibited; no ADU-specific parking requirements.
Rental Restrictions
- –Detached ADUs are banned; internal/attached ADUs in R-1, R-2, R-3 cannot be rented.
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.
Madison County