ADUs are allowed in Bay St LouisTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Bay St Louis, MS
Is your property eligible for an ADU?
# of Properties
4,786
Owner-occupied
55%
Zoning districts
20
Avg Home Value
$183,839
Median Lot Size
0.25 acres
Avg Income
$113,008
Residential Types:
4,786 housing units
Other
99%
Zoning Districts:
11,965 parcels · 20 districts
R-1
40%(4,803)
R-1A
31%(3,687)
R-2
13%(1,569)
C-3
6%(669)
Other
10%(1,237)
ADU Rules
What can you build in Bay St Louis, MS?
Bay St Louis, MS follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: By Right
Detached ADU Size Limits
- –Maximum ADU size of 50% of the principal building’s floor area.
- –Maximum ADU size of 25% of the principal building’s floor area (per lot coverage section).
Max Units
- –Detached ADU: 1 per lot on lots ≥15,000 sq ft in districts where allowed. Other ADU types: none specified.
Parking
- –2 spaces/ADU; rear-yard location required; C-1 has no off-street parking requirement; municipal/joint facilities may count toward required spaces
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 Mississippi municipalities
Rules change at the town line. Check the municipality your property is actually in.
Hancock County