ADUs are allowed in Unincorporated KendallTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Kendall, IL
Is your property eligible for an ADU?
# of Properties
2,619
Owner-occupied
85%
Zoning districts
62
Avg Home Value
$58,657
Median Lot Size
19.03 acres
Avg Income
$114,802
Residential Types:
2,619 housing units
Single Family
78%
Other
22%
Zoning Districts:
14,752 parcels · 62 districts
A1
31%(4,609)
R3
18%(2,664)
R6
17%(2,523)
R-2
5%(807)
Other
28%(4,149)
ADU Rules
What can you build in Unincorporated Kendall, IL?
Unincorporated Kendall, IL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Special Permit
- –Detached ADU: Special Permit
Interior / Attached ADU Size Limits
- –Maximum size of 50% of the principal dwelling’s livable floor area for an attached or internal secondary dwelling unit.
Detached ADU Size Limits
- –Maximum size of 50% of the principal residence’s livable floor area
- –Maximum size of 1,200 sq ft for an ECHO accessory dwelling when approved by Conditional Use
Max Units
- –RPD: 2 dwelling units per parcel (1 principal + 1 secondary).
- –A-1: 1 ECHO unit per parcel; 1 mobile home per zoning lot (medical care assistance or temporary housing during repair/construction).
Owner Occupancy
- –Owners must live in the principal residence or the ADU
Parking
- –No explicit min/max for ADUs; RPD-1 requires adequate off-street parking shared with the primary dwelling and on the same zoning lot; Temporary ECHO units may have 1 space; general residential schedule calls for 2 spaces per dwelling, but applicability to ADUs is unclear.
Rental Restrictions
- –Covenant/deed restricts rental of the ADU separately from the main dwelling; ADU cannot be rented on its own.
- –Property-wide short-term rentals require annual registration; this does not allow renting the ADU as a separate unit.
- –A-1 guest houses with kitchens must record the same covenant prohibiting separate rental.
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.
Kendall County