Albemarle County ADU rules — what you can build and when.
Interior ADUs today, detached in 2027 — a major shift for Charlottesville-area homeowners.
Verify locally — rules are changing ahead of July 1, 2027. This page reflects our working understanding at publication. Always confirm with the Albemarle County zoning department before you design or file. We handle that verification as part of every Readiness Assessment.
Albemarle in one screen.
- Interior accessory apartments allowed by-right today
- Detached ADUs currently prohibited
- Interior cap: 35% of gross floor area, owner-occupancy required
- SB 531 requires detached ADUs by-right and drops owner-occupancy in 2027
Reading between the lines.
Albemarle County today permits interior accessory apartments by-right — the classic finished-basement or over-garage unit — capped at 35% of the primary dwelling's gross floor area, with owner-occupancy required. Detached backyard cottages are currently prohibited.
SB 531 changes both. On July 1, 2027, Albemarle must permit a detached ADU by-right on every single-family lot in the county, and the owner-occupancy requirement is preempted. For Charlottesville-area homeowners this is a substantial shift — the county goes from an interior-only regime to permitting stand-alone cottages county-wide.
Utility mix here spans the Charlottesville urban service area (public water and sewer) and outlying rural districts on septic. On rural parcels, health-department review is the pacing item, as elsewhere in Piedmont Virginia.
Albemarle answers.
Can I build a detached ADU in Albemarle County today?
+
No. Albemarle currently prohibits detached accessory dwelling units. Only interior accessory apartments are permitted by-right, and owner-occupancy is required.
How big can an Albemarle interior ADU be?
+
Interior accessory apartments are capped at 35 percent of the primary dwelling's gross floor area.
When will detached ADUs be allowed in Albemarle?
+
SB 531 requires Albemarle to permit detached accessory dwellings by-right on every single-family lot starting July 1, 2027, and preempts the current owner-occupancy requirement.
Explore the rest of our county pages.
Get a written Albemarle feasibility read.
A Readiness Assessment gives you the Albemarle-specific zoning, utility and cost picture in writing — before you spend a dollar on design.