ADUs are allowed in WaukeganTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Waukegan, IL
Is your property eligible for an ADU?
# of Properties
19,273
Owner-occupied
80%
Zoning districts
21
Avg Home Value
$76,021
Median Lot Size
0.17 acres
Avg Income
$87,164
Residential Types:
19,273 housing units
Residential Improvements
100%
Zoning Districts:
23,771 parcels · 21 districts
R3
50%(11,852)
R2
28%(6,595)
R4
9%(2,036)
B2
3%(637)
Other
11%(2,651)
ADU Rules
What can you build in Waukegan, IL?
Waukegan, 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: By Right
Detached ADU Size Limits
- –Maximum detached ADU size of 900 sq ft
- –Detached ADU cannot be larger than the principal dwelling’s size
Max Units
- –Detached ADU: 1 per zoning lot on lots with a single-unit dwelling.
Owner Occupancy
- –Owner must reside on the same zoning lot as the unit
Parking
- –1 space/ADU in R1–R5; 0.5 space/ADU in Lakefront L1–L3; max: up to 40% of yard (no fixed numeric cap); ADU counts as an additional dwelling unit; rounding: <0.5 down, ≥0.5 up
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.
Lake County