ADU rules for Springfield
Accessory Dwelling Unit (ADU) Rules for Springfield, IL
Is your property eligible for an ADU?
# of Properties
42,263
Owner-occupied
70%
Zoning districts
26
Avg Home Value
$46,523
Median Lot Size
0.18 acres
Avg Income
$77,984
Residential Types:
42,263 housing units
IMPROVED RESIDENTIAL
100%
Zoning Districts:
51,604 parcels · 26 districts
R-2
47%(24,377)
R-1
29%(14,815)
R-3(B
5%(2,599)
PUD
4%(1,886)
Other
15%(7,927)
ADU Rules
What can you build in Springfield, IL?
Springfield, 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
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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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.
Sangamon County