ADUs are allowed in PerryvilleTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Perryville, MD
Is your property eligible for an ADU?
# of Properties
1,581
Owner-occupied
63%
Zoning districts
18
Avg Home Value
$244,996
Median Lot Size
0.18 acres
Avg Income
$82,999
Residential Types:
1,581 housing units
Single Family
21%
Apts (4+ units)
1%
Other
78%
Zoning Districts:
1,840 parcels · 18 districts
R-1
39%(718)
R-3
18%(323)
R2
17%(313)
RM
11%(195)
Other
16%(291)
ADU Rules
What can you build in Perryville, MD?
Perryville, MD 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: Conditional Use Permit
Interior / Attached ADU Size Limits
- –Maximum size of 750 sq ft for an internal accessory dwelling unit (in-home apartment).
- –Maximum size of 25% of the principal dwelling's gross floor area for an internal accessory dwelling unit (in-home apartment).
Parking
- –ADUs not listed in the Table of Minimum Parking Requirements; required parking to be determined by the Planning Commission using the table as a guide, with deviations possible under flexible administration.
ADU State Law
What can you build in Maryland?
- –Local-law mandate: By Oct 1, 2026, each legislative body must adopt a local law authorizing ADUs under this section.
- –Local zoning mostly remains: The subtitle generally does not alter local zoning power except as provided, but locals must establish policies that further the subtitle's intent.
- –Definition-based size cap: An ADU must be ≤ 75% of the size of the primary SF detached dwelling and subordinate in use; ADUs may be detached or attached.
- –Density/growth limits: ADUs must be excluded from density calculations and from measures limiting residential growth that pertain to the lot/parcel/tract.
- –Setbacks: Local law cannot set side/rear setbacks that exceed existing accessory-structure setbacks.
- –Parking: If a jurisdiction adds off-street parking requirements, it must consider specified factors and provide a waiver process, and must complete a parking study before adopting such requirements.
- –Alley access option: Local law may prohibit converting an accessory structure to an ADU if only vehicular access is from an alley.
- –Codes/adequate facilities: Local law must provide for ADU construction meeting public health/safety/welfare standards, including building codes and adequate public facilities provisions.
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 Maryland municipalities
Rules change at the town line. Check the municipality your property is actually in.
Cecil County