ADU rules for Frankfort
Accessory Dwelling Unit (ADU) Rules for Frankfort, IL
Is your property eligible for an ADU?
# of Properties
9,370
Owner-occupied
75%
Zoning districts
35
Avg Home Value
$221,873
Median Lot Size
0.39 acres
Avg Income
$147,240
Residential Types:
9,370 housing units
R
100%
Zoning Districts:
10,468 parcels · 35 districts
R2
56%(5,868)
R4
11%(1,203)
ER
7%(691)
B2
5%(549)
Other
21%(2,157)
ADU Rules
What can you build in Frankfort, IL?
Frankfort, 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
Parking
- –No ADU-specific parking standards; general residential rules apply (2 spaces per dwelling unit for single- and two-family dwellings; 2 per unit plus 0.5 guest spaces for attached-family dwellings).
Rental Restrictions
- –Vacation rentals require a license; max 10 guests; 250-ft separation.
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.
Will County