ADUs are allowed in AntiochTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Antioch, IL
Is your property eligible for an ADU?
# of Properties
5,086
Owner-occupied
82%
Zoning districts
20
Avg Home Value
$105,499
Median Lot Size
0.22 acres
Avg Income
$130,561
Residential Types:
5,086 housing units
Residential Improvements
100%
Zoning Districts:
6,457 parcels · 20 districts
R-1
44%(2,840)
R-2
33%(2,155)
R-3
7%(444)
MT
3%(178)
Other
13%(840)
ADU Rules
What can you build in Antioch, IL?
Antioch, IL follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum internal or attached ADU size of 800 sq ft in the Traditional Neighborhood Development district.
Detached ADU Size Limits
- –Maximum ADU size of 800 sq ft in the Main Street Transitional district.
- –Maximum ADU size of 40% of the primary structure's floor area in the Main Street Transitional district.
Owner Occupancy
- –At least one dwelling unit must be owner occupied on the property.
Parking
- –No ADU parking ratio stated; Downtown Parking District exempts small residential uses from minimum; on-street spaces may count toward required parking in Traditional Neighborhood Developments; ADUs allowed in DFBC (special use) or in TND (by right).
Rental Restrictions
- –Short-term rentals (Airbnbs) prohibited for ADUs; carriage houses must have at least one unit owner-occupied, so both cannot be rented; when a Bed & Breakfast operates on the principal dwelling, no additional dwelling units may be occupied on the site.
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.
Lake County