ADU rules for Quincy
Accessory Dwelling Unit (ADU) Rules for Quincy, IL
Is your property eligible for an ADU?
# of Properties
35
Owner-occupied
69%
Zoning districts
21
Median Lot Size
7.40 acres
Avg Income
$80,008
Residential Types:
35 housing units
2-3 Family
100%
Zoning Districts:
17,181 parcels · 21 districts
R1C
42%(7,269)
R2
15%(2,637)
R1A
15%(2,596)
R3
8%(1,357)
Other
19%(3,322)
ADU Rules
What can you build in Quincy, IL?
Quincy, 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
Max Units
- –0 ADUs per lot
Owner Occupancy
- –No owner-occupancy requirement
Rental Restrictions
- –Detached ADU: accessory buildings may not be used for dwelling purposes.
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