ADUs are allowed in New MarketTypes:Internal
Types:Internal
Accessory Dwelling Unit (ADU) Rules for New Market, MD
Is your property eligible for an ADU?
# of Properties
524
Owner-occupied
94%
Zoning districts
10
Avg Home Value
$630,229
Median Lot Size
0.34 acres
Avg Income
$133,598
Residential Types:
524 housing units
Single Family
3%
Other
97%
Zoning Districts:
667 parcels · 10 districts
R1
72%(478)
RM
16%(104)
OS
7%(46)
MRS
4%(27)
Other
2%(12)
ADU Rules
What can you build in New Market, MD?
New Market, 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: Not addressed in the local bylaw
Interior / Attached ADU Size Limits
- –Maximum size of 800 sq ft for an internal or attached accessory dwelling unit
- –Maximum size of 33% of the principal dwelling’s gross livable (habitable) floor area
Owner Occupancy
- –No owner-occupancy requirement for ADUs
Parking
- –1 space per bedroom for ADU; 4-space minimum for Accessory Apartment (principal + ADU); admin waiver if ADU occupants have no vehicles (max 2 vehicles; off-street); Historic District variance if adequate public parking exists within 350 feet or district impact; Planning Commission may reduce up to 25% or grant a waiver; no residential maximums.
Rental Restrictions
- –Detached ADU rentals prohibited; guesthouse may not be rented or used as a separate dwelling.
- –Attached ADU: short-term rentals (<30 days) not allowed.
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.
Frederick County