ADU rules for St Charles
Accessory Dwelling Unit (ADU) Rules for St Charles, IL
Is your property eligible for an ADU?
# of Properties
10,198
Owner-occupied
90%
Zoning districts
24
Avg Home Value
$150,919
Median Lot Size
0.20 acres
Avg Income
$123,881
Residential Types:
10,198 housing units
Apts (4+ units)
92%
Other
8%
Zoning Districts:
11,977 parcels · 24 districts
RS-4
22%(2,650)
RS-3
15%(1,767)
RM-2
12%(1,394)
RS-2
8%(980)
Other
43%(5,186)
ADU Rules
What can you build in St Charles, IL?
St Charles, 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
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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Is your property eligible for an ADU?
ADU rules in other Illinois municipalities
Rules change at the town line. Check the municipality your property is actually in.
DuPage County