Frequently Asked Questions
West Virginia ADU answers.
How much does an ADU cost in West Virginia?
ADU costs range from $34,000 for a basic garage conversion to $188,000 for a large detached new build. Actual cost depends on municipality, site access, slope, utilities, ADU type and finish level.
Does West Virginia have a statewide ADU law?
Yes, as of June 4, 2026. Senate Bill 659, sponsored by Sens. Patricia Rucker, Zachery Maynard, and Darren Thorne, was signed by Governor Patrick Morrisey on March 14, 2026 and requires every municipality to allow at least one ADU by right — attached, detached, or internal — on single-family residential lots, with no discretionary review. Local zoning, building, utility, site, and private-covenant requirements may still apply; verify the current rules for the property before design or construction.
What does West Virginia's SB 659 ADU law require?
SB 659 caps ADU size at 75% of the primary home's gross floor area or 1,000 sq ft, whichever is less, and bars municipalities from requiring additional off-street parking, exterior design matching the primary home (outside historic districts), a familial relationship between occupants, or fees above $250. Manufactured homes can qualify as ADUs under specified conditions, and short-term rental use remains separately regulated by each municipality. Any local ordinance conflicting with the law that is adopted after January 1, 2027 is void. The bill passed the Senate 27-1 and the House 85-10 before being signed into law.
How long does an ADU permit take in West Virginia?
The representative ADU permit-review planning timeline for West Virginia is 3 – 9 weeks. This is not a statewide deadline or guarantee. Timing can change with the local authority, project complexity, corrections, utilities, site conditions, and application completeness; confirm the current timeline locally.
What is the cheapest ADU to build in West Virginia?
Garage conversions are generally the least expensive option, with the archived planning range at $34,000–$92,000. Basement conversions can also be cost-efficient when the existing space qualifies.
Which West Virginia market has the strongest rental benchmark?
Morgantown is the strongest market represented in the adopted basket, supported by university and medical employment. A specific property's achievable rent still requires local verification.
What is the ROI on an ADU in West Virginia?
The adopted West Virginia one-bedroom planning range is $675–$800 per month, derived from the HUD FY2026 revised FMR market basket under ROI-CM-1.4. Payback is calculated from the homeowner's budget, ADU type, size, rent range, and a 30% operating-expense reserve. Property value uses a 15% national planning input with a 10%–20% uncertainty range; it is not a valuation.
