ADU rules for Chesterfield
Accessory Dwelling Unit (ADU) Rules for Chesterfield, MO
Is your property eligible for an ADU?
# of Properties
17,294
Owner-occupied
91%
Zoning districts
48
Avg Home Value
$618,833
Median Lot Size
0.35 acres
Avg Income
$149,436
Residential Types:
17,302 housing units
Single Family
86%
Apts (4+ units)
14%
Zoning Districts:
19,859 parcels · 48 districts
R2
33%(6,601)
R3
16%(3,101)
R1A
13%(2,609)
R1
8%(1,608)
Other
30%(5,940)
ADU Rules
What can you build in Chesterfield, MO?
Chesterfield, MO 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 minimum or maximum; final determination by Director of Planning; parking generally on the same parcel; no ADU row in residential uses; joint/off-site exceptions only for commercial/industrial uses
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 Missouri municipalities
Rules change at the town line. Check the municipality your property is actually in.
St. Louis County