ADUs are allowed in Port DepositTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Port Deposit, MD
Is your property eligible for an ADU?
# of Properties
390
Owner-occupied
37%
Zoning districts
10
Avg Home Value
$170,114
Median Lot Size
0.06 acres
Avg Income
$75,455
Residential Types:
390 housing units
Single Family
21%
Apts (4+ units)
1%
Other
78%
Zoning Districts:
534 parcels · 10 districts
CCD
62%(333)
WMU
27%(144)
BI
4%(19)
OS
2%(13)
Other
5%(25)
ADU Rules
What can you build in Port Deposit, MD?
Port Deposit, MD follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum size of 30% of the principal dwelling’s gross floor area for an internal or attached ADU
Max Units
- –1 ADU per lot (ST, RM; CCD general residential).
- –Up to 2 ADUs in the same building as a retail/service in CCD mixed-use (not street level).
- –RCA Overlay: 1 additional ADU as part of the primary dwelling (if allowed by underlying zone; not subdividable).
Owner Occupancy
- –Owner must occupy a dwelling unit on the premises.
Parking
- –3 spaces minimum (1 per unit + 1 extra for the ADU); no max; reductions via shared/joint parking; Historic District encourages shared/municipal parking when on-site is impracticable; ADU parking should be located to the side or rear and visually screened.
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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Is your property eligible for an ADU?
ADU rules in other Maryland municipalities
Rules change at the town line. Check the municipality your property is actually in.
Cecil County