ADUs are allowed in MarionTypes:Detached
Types:Detached
Accessory Dwelling Unit (ADU) Rules for Marion, VA
Is your property eligible for an ADU?
# of Parcels
6,550
Zoning districts
12
Avg Parcel Value
$361,982
Zoning Districts:
6,607 parcels · 12 districts
R-2
60%(3,970)
R-1
18%(1,218)
C-G
11%(743)
I-G
3%(208)
Other
7%(468)
ADU Rules
What can you build in Marion, VA?
Marion, VA 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: By Right
Detached ADU Size Limits
- –Maximum size is 25% of the floor area of one floor of the primary structure.
Max Units
- –Detached ADU: 1 per primary structure.
- –Per-lot limit: 1 ADU per lot (only one principal building per lot).
Owner Occupancy
- –Owner occupancy not required for ADUs.
Parking
- –2 spaces per ADU; off-street on the same lot as the principal residence; no transit-based reductions or waivers
Rental Restrictions
- –Short-term rentals must be registered; unregistered operators or those with repeated violations may be prohibited.
ADU State Law
What can you build in Virginia?
- –Virginia does not have a statewide ADU mandate; ADU rules are set by individual municipalities.
- –Building/fire codes are set statewide, but whether an ADU is allowed is local zoning.
- –SB 304 would have mandated ADUs. It passed the Virginia Senate in 2024 but was continued/left in House committee (i.e., not enacted statewide)
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 Virginia municipalities
Rules change at the town line. Check the municipality your property is actually in.
Smyth County