ADU rules for Joliet
Accessory Dwelling Unit (ADU) Rules for Joliet, IL
Is your property eligible for an ADU?
# of Properties
60,184
Owner-occupied
61%
Zoning districts
21
Avg Home Value
$173,185
Median Lot Size
0.20 acres
Avg Income
$90,739
Residential Types:
60,184 housing units
Other
100%
Zoning Districts:
67,071 parcels · 21 districts
R-2
51%(34,518)
R-4
9%(6,009)
R-3
8%(5,682)
R-5
6%(3,825)
Other
25%(17,037)
ADU Rules
What can you build in Joliet, IL?
Joliet, IL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not permitted
- –Detached ADU: Not permitted
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
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.
Will County