ADU Pass
Keen Mountain
ADU Pass helps homeowners in Keen Mountain, No County, Virginia navigate the permit paperwork for building an accessory dwelling unit. This area covers 1 ZIP code.
Map
ADU details
ADU legality: allowed-with-restrictions
Attached accessory dwelling routine in R-1 zones per Buchanan County Code; detached habitable accessory structures typically require CUP outside R-1. Septic capacity (Buchanan County Health Department / Virginia Department of Health Cumberland Plateau Health District), steep-slope siting, and SMCRA / post-mining subsidence overlay are the dominant practical constraints in this coalfield community. Post-July 2027 SB531 standardizes by-right rules statewide.
Cost scenarios
| Scenario | Sq ft | Permit | Build | Total |
|---|---|---|---|---|
| minimum | 200 | $380 | $50,000 | $50,380 |
| 600 | 600 | $580 | $150,000 | $150,580 |
| midpoint | 600 | $580 | $150,000 | $150,580 |
| maximum | 900 | $720 | $225,000 | $225,720 |
Fee breakdown (as of 2026-05)
Permitting process
Viability (permitted uses)
- Long-term rental: with-restrictions Long-term rental of an accessory dwelling permitted in R-1; outside R-1 requires CUP. Tenant pool is correctional-center staff and miners; turnover modest.
- Short-term rental: with-restrictions Buchanan County does not have a county-wide STR ordinance; transient occupancy use of a habitable accessory structure may require CUP. STR demand in Keen Mountain is thin (no tourism anchor besides correctional-center family visitors and ATV/Spearhead Trails seasonal traffic).
- Office rental: no Third-party office rental requires B-1 or B-2 zoning. Detached residential-zoned accessory dwellings cannot host outside-tenant office uses.
- Home office: yes Home occupation by owner is generally permitted in Buchanan residential zones with no client traffic or external signage.
- Studio / workshop: yes Personal artist or workshop use of an accessory structure permitted in residential and agricultural zones.
- Agriculture: yes Buchanan A-1 zone supports farm-related accessory structures and farmworker housing by-right; many Keen Mountain peripheral parcels are A-1.
- Relative support: with-restrictions In-law / multigenerational use of an attached accessory dwelling routine in R-1; detached requires CUP unless within primary dwelling envelope.
Incentives
Contacts
Utilities
- Water: Buchanan County Public Service Authority (limited Keen Mountain coverage along US 460); many parcels on private well · 35d connect · $4,500
- Sewer: Buchanan County Public Service Authority (limited coverage); rural parcels on private septic; PSA service primarily along US 460 and around Keen Mountain Correctional Center · 60d connect · $14,000
- Electric: Appalachian Power Company (AEP) · 30d connect · $1,900
- Gas: Propane delivered (no natural gas mains); some Buchanan parcels still have legacy coalbed methane tap-rights · 14d connect · $1,800
Property values & taxes
Construction timeline
Realistic total: best 9mo · typical 14mo · worst 22mo
Modular pathway inspectors are occasional with modular
Steep ridge-and-valley terrain; US 460 is the main corridor. Narrow rural side roads off 460 require wide-load route surveys; ridge-top parcel access can be impractical for modular drop.
Financing
State ADU loans:
Insurance impact
HOA prevalence & preemption
Buchanan County subdivision activity is minimal; the company-town plat of Keen Mountain predates modern HOAs. Most parcels are independently held with no HOA.
Regulatory overlays (2)
- other
SMCRA / post-mining subsidence overlay: most Keen Mountain parcels sit above former Island Creek Coal deep-mine workings (the Beatrice Mine closed late 1980s after operating since 1939). Foundation engineering, subsidence-insurance disclosure, and Virginia Department of Energy review may be required. Federal AML (Abandoned Mine Land) program may flag specific parcels. - flood-zone
Levisa Fork and Slate Creek floodplains affect some valley-floor Keen Mountain parcels (FEMA Zone A/AE). Steep ridge parcels above the floodplain are unaffected but face slope/landslide risk.
Technical envelope (climate & building code)
Climate & energy code
Building code
Amendments:
- Amendment
- Amendment
- Amendment
Contractor market (aggregate)
Legal history (timeline)
Current ordinance: Buchanan County Code Chapter 165 (Zoning), R-1 Limited Residential District, adopted 1976-01-01, last amended 2023-01-01
- 1977-08-03 — Surface Mining Control and Reclamation Act (SMCRA) enacted (federal-law)
Federal law regulating coal-mining surface effects and post-mining land restoration. Establishes Office of Surface Mining and subsidence/AML overlay obligations for coalfield properties.
Effect: Most Keen Mountain parcels sit above former deep-mine workings; SMCRA subsidence-risk and Abandoned Mine Land overlays govern foundation engineering and may require subsidence-insurance disclosures for new construction. - 1990-01-01 — Keen Mountain Correctional Center opens (state-action)
Virginia Department of Corrections opened the Keen Mountain Correctional Center (Level 4, ~1200 capacity, ~400 staff) as part of state economic-development response to coal-industry decline. The facility remains the community's dominant employer.
Effect: Stable institutional employment base for the community; correctional-staff housing demand supports modest secondary housing market. - 2026-04-14 — Virginia SB531 signed by Governor Spanberger (state-bill)
Statewide ADU mandate effective July 1, 2027. By-right ADU permission in single-family zones; $500 permit-fee cap; setback rules cannot exceed those of primary dwelling.
Effect: Buchanan County will need to either point to its existing R-1 accessory-dwelling permissions as compliant or formally amend its code to align.
Known issues (3)
- other — Adds $5,000-15,000 to foundation engineering for ADU construction on subsidence-flagged parcels; project timelines extend by 30-60 days for engineering review.
- other — Owner-use and multigenerational-support ADU economics dominate; speculative-rental builds rarely pencil in this market.
- staffing-shortage — Longer permit cycles than urban Virginia; phone-and-paper interactions are the norm.
County: no attribution (synthetic bucket)
No county
This city sits in the state's "no county" bucket — its ADU rules derive directly from state law and city ordinance without a county intermediary. No county-level sections apply.
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.
ZIP Code
- 24624
Post Office
- 1063 Keen Mountain Camp Rd, 24624