ADU rules for Unincorporated Cook
Accessory Dwelling Unit (ADU) Rules for Unincorporated Cook, IL
Is your property eligible for an ADU?
# of Properties
32,606
Owner-occupied
63%
Zoning districts
101
Avg Home Value
$38,366
Median Lot Size
0.39 acres
Avg Income
$104,041
Residential Types:
32,606 housing units
Other
100%
Zoning Districts:
38,451 parcels · 101 districts
R5
29%(11,255)
R4
24%(9,077)
R8
12%(4,741)
R7
11%(4,221)
Other
24%(9,157)
ADU Rules
What can you build in Unincorporated Cook, IL?
Unincorporated Cook, 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
Owner Occupancy
- –No owner-occupancy requirement for ADUs
Parking
- –No ADU-specific min/max; general rule requires 2 off-street spaces per dwelling for one- and two-family units; no ADU-specific exceptions; modifications/waivers may be granted by Cook County Dept of Highways under Article 11.
Rental Restrictions
- –Detached ADU (living quarters, detached) shall not be rented or used as a separate dwelling; short-term rentals require stays of 24 hours minimum and up to 30 consecutive days; non-supervised STRs require Special Use and additional conditions; supervised STRs must meet home-based occupancy rules.
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.
Cook County
Browse addresses by ZIP in Unincorporated Cook
600167,029 addresses600253,094 addresses601642,734 addresses600622,680 addresses604672,082 addresses604642,067 addresses604392,061 addresses606381,556 addresses605251,129 addresses60411905 addresses60463840 addresses60004818 addresses60010805 addresses60193694 addresses60067690 addresses60462610 addresses60120532 addresses60007481 addresses60477474 addresses60803449 addresses60438413 addresses60443411 addresses60406346 addresses60056332 addresses60192323 addresses60430317 addresses60093254 addresses60445245 addresses60656230 addresses60074211 addresses60126197 addresses60660194 addresses60172188 addresses