ADUs are allowed in Unincorporated MiddlesexTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Middlesex, VA
Is your property eligible for an ADU?
# of Properties
10,330
Owner-occupied
55%
Zoning districts
15
Avg Home Value
$202,770
Median Lot Size
1.21 acres
Avg Income
$79,707
Residential Types:
10,330 housing units
Other
100%
Zoning Districts:
13,419 parcels · 15 districts
LDR
45%(6,039)
R
38%(5,112)
VC
11%(1,532)
GB
2%(238)
Other
4%(498)
ADU Rules
What can you build in Unincorporated Middlesex, VA?
Unincorporated Middlesex, VA 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
Detached ADU Size Limits
- –Maximum detached accessory dwelling unit size of 800 sq ft
- –Maximum detached accessory dwelling unit size of 50% of the principal dwelling’s total living area
Max Units
- –1 ADU per lot for single-family detached (LDR/VC/R).
- –Manufactured home, duplex, and multifamily principal structures: 0 per lot.
- –ADU types: Detached ADU = 1 per lot; Attached/Internal ADU and JADU: no max stated.
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –1 space/ADU (in addition to the principal-dwelling 2 spaces); total 3 spaces on a single-family lot with a detached ADU; no waivers; ADUs allowed only in LDR, VC, and R districts with a single-family detached dwelling; manufactured homes not allowed.
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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