ADU Pass
Albemarle County
ADU Pass helps homeowners in Albemarle County, Virginia navigate the permit paperwork for building an accessory dwelling unit. We cover 12 cities and 23 ZIP codes in this county.
Map
County ADU details
County ADU ordinance
Albemarle County permits one accessory apartment per lot as an accessory use to a single-family dwelling, subject to occupancy, size, and placement standards in Zoning Ordinance Section 5.1.34 and the per-district use regulations. The county's definition of an accessory apartment is a second dwelling unit (attached or detached) on a lot with a single-family dwelling. The base size cap is 900 square feet or 35% of the gross floor area of the primary dwelling, whichever is less; owner-occupancy of either the primary dwelling or the accessory apartment is required; and no more than one accessory apartment is permitted per lot. Attached accessory apartments (within, or attached to, the primary dwelling) are by-right in residential and rural districts; detached accessory apartments (in a separate accessory structure) are permitted in the Rural Areas (RA) district by-right and in most residential districts with administrative review. The rural areas of Albemarle are further governed by the Monticello-viewshed Entrance Corridor overlays and the Mountain Overlay District, both of which can bind ADU placement and visibility even where the underlying zoning permits the unit.
County permitting (unincorporated parcels)
Albemarle County's Community Development Department issues ADU building permits for every parcel in the county. The department is organized into three divisions relevant to ADU permitting: Zoning (use compliance, Section 5.1.34 supplemental standards, Special Use Permits), Building Inspections (building permit, trade permits, inspection sequence), and Planning (for Rural Areas conservation, Mountain Overlay District review, and Entrance Corridor / ARB coordination). Because Charlottesville is an independent city (not part of Albemarle), ADU projects on the UVA periphery and urban-ring neighborhoods around Charlottesville need to be sited on an Albemarle parcel, not a Charlottesville city parcel, to route through this county process. A typical ADU permit bundle includes: (1) a Zoning Clearance confirming Section 5.1.34 compliance and owner-occupancy covenant recording, (2) a Building Permit with stamped plans, (3) Electrical, Plumbing, and Mechanical trade permits, (4) a Virginia Department of Health (VDH) Thomas Jefferson Health District construction permit for well and/or septic on parcels not served by Albemarle County Service Authority (ACSA) water/sewer, (5) a Floodplain Development Permit if any portion of the parcel is within the mapped 100-year floodplain, (6) Architectural Review Board (ARB) review if the parcel is in an Entrance Corridor overlay, and (7) additional Mountain Overlay District review for parcels above the mountaintop elevation threshold.
County assessor
Albemarle County real estate is assessed by the Office of the County Assessor, Real Estate Division, under the County Executive's office. Albemarle operates on an annual reassessment cycle — one of the shorter cadences in Virginia — with reassessment notices mailed each winter and effective January 1 of each year. This is a locality-elected two-year-or-shorter cycle authorized under Va. Code § 58.1-3252 (Albemarle has elected the annual cycle). An ADU addition is captured through the real-estate-improvement / new-construction supplemental process: the Assessor's Office receives the building-permit record and Certificate of Occupancy from Community Development, and adds the accessory apartment's assessed value to the parcel's land and improvement base, prorated to the completion date under Va. Code § 58.1-3292. Because Albemarle reassesses annually, the next general reassessment then re-bases the full parcel (land + primary dwelling + accessory apartment + any other improvements) at the new assessment date; there is typically no multi-year delay between an ADU being built and being fully re-valued.
Assessment policy: An accessory apartment is captured as a real-estate improvement under Va. Code Title 58.1 Subtitle III Chapter 32. On receipt of the building permit and (later) the Certificate of Occupancy from Community Development, the Real Estate Division prorates the supplemental assessment from the completion date through the end of the tax year. The accessory apartment is added at its assessed fair-market value (typically derived from cost approach using Marshall & Swift residential cost multipliers calibrated to Albemarle's annual reassessment base) on top of the parcel's existing land and improvement value. Because Albemarle reassesses annually, the next January 1 reassessment then re-bases the full parcel at the prevailing market value — the supplemental approach and the annual general reassessment converge quickly, unlike four-year-cycle counties where a construction-year supplemental can diverge from market for several years. There is no Albemarle-County-specific ADU assessment exemption. Virginia's Land Use Assessment program (Va. Code § 58.1-3230 et seq.) provides reduced-value assessment for qualifying agricultural, horticultural, forestal, and open-space land; Albemarle participates in all four categories and an accessory apartment on a use-value parcel may affect the parcel's eligibility if the ADU's footprint and curtilage change the parcel's qualifying use composition. Standard Virginia real-estate tax relief programs (elderly and disabled relief under § 58.1-3210, disabled-veteran exemption under § 58.1-3219.5) apply to the homeowner's principal residence; they do not create a separate carve-out for the accessory apartment itself.
County overlays (5)
Albemarle County administers an unusually dense overlay regime, reflecting the county's role as gateway to Monticello (UNESCO World Heritage Site), the presence of the University of Virginia adjacent to the county on the Charlottesville side, and the Blue Ridge / Southwest Mountains ridgeline topography. Five overlay regimes bear materially on ADU projects: (1) the Floodplain Overlay District tied to FEMA Special Flood Hazard Areas; (2) the Entrance Corridor overlays (US-250 East/West, US-29 North/South, VA-20 North/South, I-64 visible segments, and the Monticello-viewshed corridors) reviewed by the county's Architectural Review Board; (3) the Mountain Overlay District (mountaintop and ridgeline protection zones in the Blue Ridge western portion of the county and the Southwest Mountains eastern portion); (4) the Steep Slopes overlay tied to grading and land-disturbance limits on slopes above specified gradients; and (5) the Historic Overlay District / Monticello Viewshed protection zone around Monticello, Ash Lawn-Highland, and the adjacent Thomas Jefferson cultural landscape. Albemarle has no coastal-commission jurisdiction (fully inland Piedmont county; no tidal waters), no CalFire-equivalent WUI regime (Virginia has no statewide wildland-urban-interface overlay, though the Department of Forestry coordinates wildfire response in the rural portions), and no seismic-retrofit overlay.
Known county issues (4)
- policy-review — ADU proposals pursued in 2026 may face ordinance amendments during the permit window (changes to the 900-sqft / 35% cap, to the owner-occupancy rule, or to the detached-versus-attached review path), and zoning certainty may be lower than in a comprehensive-plan-stable period. Owners should confirm the current ordinance text at permit submittal rather than relying on pre-submittal advice that predates the AC44 adoption. The Comprehensive Plan update is expected to expand ADU-friendly provisions in the Designated Development Areas to address Charlottesville-area housing affordability, while potentially tightening rural ADU siting in the Monticello viewshed.
- other — Rural ADU pro formas in the VA-20 South corridor, the US-250 East Pantops-to-Shadwell corridor, and the Carter's Mountain / Brown's Mountain / Montalto foreground should assume a Special Use Permit path rather than a by-right administrative path. Budget an additional 6-9 months of review wall-clock time and several thousand dollars of ARB/SUP fees. Design concessions (low roof pitch, dark cladding, tree retention, reduced mass) are routinely required.
- other — An ADU project on the UVA periphery or the city/county urban fringe must be sited on a parcel whose GPIN (Geographic Parcel Identification Number) begins with an Albemarle County prefix to route through Albemarle's Community Development. A Charlottesville parcel — even if the street address reads 'Charlottesville' — routes through Charlottesville Neighborhood Development Services instead. The parcel's jurisdiction is visible on the Albemarle County GIS parcel viewer. Several neighborhoods straddle the line (e.g., portions of Belmont, Fry's Spring) and the jurisdictional assignment is parcel-specific, not neighborhood-specific.
- other — Rural ADU timelines in Albemarle are bounded on the low end by the VDH queue, not by the county's Community Development plan-review queue. Owners planning a rural ADU should engage a private sanitarian and submit to TJHD early in the design process, before finalizing Community Development plans, to avoid a 3-5 month VDH-induced delay after Community Development has approved the building permit.
Virginia state — ADU law and programs
State ADU law
Virginia has NOT enacted a statewide ADU preemption law. Virginia is a Dillon Rule state — localities possess only those powers expressly granted by the General Assembly — and the statutes granting zoning authority (Va. Code § 15.2-2280 et seq.) leave ADU regulation to local ordinances. ADU permission, setbacks, parking, size, and owner-occupancy rules therefore vary by county, independent city, and town. Virginia is unique in that it has 38 independent cities that function as counties (neither in nor subordinate to the surrounding county), meaning 'the county' for any given Virginia property may be an independent city rather than a true county. Several ADU preemption bills have been introduced in recent General Assembly sessions (2022 through 2025) without enactment; none have advanced past committee as of the Assembly's 2026 regular session adjournment.
State financing programs
Virginia does not operate an ADU-specific statewide loan, grant, or forgivable-loan program. Virginia Housing (formerly the Virginia Housing Development Authority, VHDA — rebranded 2020) administers general first-time-homebuyer, down-payment-assistance (DPA), mortgage-credit-certificate, and rehabilitation products that can be applied to ADU-adjacent purchases or improvements when eligibility criteria are met, but none target ADU construction as a distinct product. The Virginia Department of Housing and Community Development (DHCD) administers federal HOME and CDBG pass-through funds that local jurisdictions can direct toward ADU-adjacent rehab, but there is no state-level ADU-dedicated line item. Federally available products (FHA 203(k), Fannie Mae HomeReady and HomeStyle Renovation, Freddie Mac CHOICERenovation) remain the primary ADU financing path for Virginia homeowners.
State housing programs
Virginia does not run a state-level pre-approved-ADU-plan catalog, statewide impact-fee-waiver statute for ADUs, or streamlined-review mandate. State-level programs that touch ADU-adjacent policy are coordinated primarily through the Department of Housing and Community Development (DHCD) and Virginia Housing, and act by funding or assisting local jurisdictions rather than by preemption. Local ADU activity — Arlington County's Accessory Dwellings program (detached ADUs permitted since 2008, liberalized 2020), Alexandria's accessory-dwelling ordinance, Fairfax County's accessory-living-unit program, and Charlottesville's 2021 zoning-code changes — is authorized under the localities' Va. Code § 15.2-2280 zoning authority, not by state mandate.
- DHCD Community Development Block Grant (CDBG) Program — Federal CDBG funds administered by DHCD to eligible non-entitlement Virginia localities for community-revitalization, housing-rehab, and infrastructure projects. Not ADU-specific. Participating localities can direct CDBG funds toward housing-rehab projects where local policy supports ADUs.
- DHCD HOME Investment Partnerships Program — Federal HOME funds administered by DHCD to Virginia participating jurisdictions and non-profits for affordable-housing acquisition, rehab, and new construction. Not ADU-specific; can be directed to ADU-adjacent rehab at local discretion.
- Virginia Housing Commission — Permanent advisory commission of the General Assembly that studies housing-policy questions and recommends legislation. Has periodically studied ADU preemption and missing-middle housing without recommending statewide enactment as of 2026-04-21.
- Local ADU ordinances under Va. Code § 15.2-2280 authority — Not a state program — listed here because Virginia ADU policy is executed entirely at the locality level under the § 15.2-2280 zoning grant. A homeowner seeking to build an ADU consults the zoning ordinance of the specific county, city, or town where the parcel is located.
Federal (United States) — ADU-relevant rules and programs
Federal ADU law
The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.
Federal financing programs
Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.
Federal tax credits
There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.
Federal housing programs
HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.