ADU rules for Unincorporated Washington
Accessory Dwelling Unit (ADU) Rules for Unincorporated Washington, VA
Is your property eligible for an ADU?
# of Properties
89
Owner-occupied
64%
Zoning districts
25
Avg Home Value
$2,791,758
Median Lot Size
1.95 acres
Avg Income
$72,417
Residential Types:
89 housing units
CRAWL
100%
Zoning Districts:
33,323 parcels · 25 districts
A1
33%(10,951)
A2
23%(7,736)
R2
20%(6,580)
CR
7%(2,396)
Other
17%(5,660)
ADU Rules
What can you build in Unincorporated Washington, VA?
Unincorporated Washington, 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: Not addressed in the local bylaw
Parking
- –1 space per dwelling unit; no ADU-specific standard; spaces on same lot; deviations may be approved; remote parking up to 600 ft allowed only for non-dwelling buildings
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.
Washington County