Hanover County

Every parcel in Hanover County outside the Town of Ashland is unincorporated (Hanover contains no independent cities and only one incorporated town — Ashland — so the unincorporated area is the dominant geography). The Hanover County Department of Community Development (which houses Planning, Zoning, Building Inspections, and Environmental Services) is the principal permitting authority for any accessory-dwelling construction in unincorporated Hanover. The combined permit path is a two-track review: (a) a zoning-compliance determination confirming the proposed accessory dwelling fits a permitted or conditionally-permitted category under Chapter 26 (handled by the Planning / Zoning staff), and (b) a building-code plan review and inspection cycle confirming compliance with the Virginia Uniform Statewide Building Code (USBC), which incorporates the Virginia Residential Code and associated state-adopted supplements (handled by Building Inspections). For parcels where Chapter 26 does not permit a second dwelling by right, the applicant must first obtain a conditional-use permit (CUP), a special exception, or a zoning variance (the specific mechanism depends on the Chapter 26 category governing the intended use), processed through the Planning Commission and Board of Supervisors per Va. Code § 15.2-2285 or through the Hanover County Board of Zoning Appeals where the Chapter 26 text routes the matter there. Hanover uses online permit portals and customer-service counters at the Hanover County Government Complex in Hanover (courthouse area) for building-permit intake, and offers free pre-application conferences with Planning staff for zoning questions.

Process overview: Typical accessory-dwelling permit sequence in unincorporated Hanover County: (a) applicant uses the county's GIS viewer to confirm parcel zoning classification, lot size, existing primary-dwelling square footage, and any overlay designations (Chesapeake Bay Preservation Area Resource Protection Area or Resource Management Area, Pamunkey River or South Anna River tidal or near-tidal segments, FEMA floodplain designations along the Pamunkey, South Anna, Chickahominy, Little River, and Totopotomoy Creek drainages, airport approach zones for Hanover County Municipal Airport (KOFP) in Ashland and the far periphery of Richmond International Airport (KRIC) to the south, and historic overlay districts particularly around Hanover Courthouse and along the US-301 / US-1 historic-road corridors); (b) applicant schedules a free zoning pre-application conference with Planning Division staff to confirm whether the proposed accessory dwelling is permitted by right, requires a conditional-use permit (CUP), requires a special exception, or is outright prohibited in the parcel's Chapter 26 zoning district; (c) if a CUP or special exception is required, applicant files the appropriate application (with fee) and proceeds through Planning Commission work-session and advertised public-hearing review and then Board of Supervisors advertised public-hearing review — this can add several months to the timeline and requires notice to adjoining property owners per Va. Code § 15.2-2204; (d) once zoning entitlement is secured, applicant files a residential building permit with site plan, floor plans, elevations, energy-compliance documentation (Virginia Energy Conservation Code), structural details for detached units, plumbing / electrical / mechanical rough-in plans, and Virginia-certified design-professional seals where required by building size and occupancy; (e) Hanover Building Inspections performs plan review, issues the building permit, and schedules inspections (typically footing, foundation, framing, rough-in plumbing / electrical / mechanical, insulation, final); (f) the Chesapeake Bay Preservation Area review layer applies to parcels within RPA / RMA boundaries (much of Hanover drains to the Pamunkey, South Anna, Chickahominy, and North Anna Rivers, all of which are Tidewater Virginia tributaries that generate CBPA buffer designations) and requires a separate water-quality-impact assessment and / or variance if impervious-coverage thresholds are exceeded; (g) floodplain-development permits apply to parcels in FEMA Special Flood Hazard Areas; (h) for parcels inside the airport-approach overlay near the Hanover County Municipal Airport (KOFP) in Ashland, height and disclosure requirements attach; (i) for parcels on well-and-septic service (which is the majority of rural Hanover), the Virginia Department of Health Onsite Sewage and Well Regulations govern septic-system capacity and expansion, and a VDH-issued construction permit for septic system modification is required before the ADU can be occupied — this is often the gating item for rural ADUs because many legacy drainfields cannot accommodate a second dwelling's additional wastewater load without system upgrade; (j) after construction, the Real Estate Assessor's Office (Finance Department) issues a supplemental assessment in the next annual reassessment cycle. Hanover does NOT offer a ministerial 60-day state-mandated ADU review clock — Virginia has no statewide review-time preemption — so timelines vary by project complexity and whether entitlement requires a CUP / special exception or is by-right within the existing Chapter 26 framework.

Impact fees: Virginia counties generally DO NOT charge true impact fees in the California or Washington sense — Va. Code § 15.2-2317 et seq. restricts impact-fee authority to designated 'growth areas' meeting narrow eligibility criteria, and Hanover has not (as of 2026-04-21) established a road-impact-fee program under that authority. Hanover instead assesses (a) proffered conditions negotiated at rezoning applications, (b) utility connection fees for county water and sewer service (administered by the Department of Public Utilities) where county water-sewer service is available — most of Hanover is served by private wells and septic systems; county water and sewer is concentrated in the Mechanicsville area, the Atlee / Rutland / Hanover Crossing / Bell Creek area, and portions of Ashland / Doswell, (c) building-permit and plan-review fees at cost-recovery rates, and (d) cash proffers at rezoning under Va. Code § 15.2-2303.4 which are narrowly constrained since the 2016 proffer-reform statute. There is no Hanover-County-wide ADU-specific fee waiver because there is no across-the-board impact-fee framework to waive. Water and sewer connection fees for an accessory dwelling depend on whether the ADU adds a new service connection or shares the primary's connection. For rural parcels on well and septic, there are no county utility connection fees but there are Virginia Department of Health (VDH) permit fees for septic-system modification, and the cost of expanding or replacing a drainfield to handle an additional dwelling's load is often the single largest soft-cost item for a rural Hanover ADU. School fees are not assessed separately in Virginia; school-capital needs are funded through the county's general-fund budget. The Virginia Uniform Statewide Building Code is administered statewide, so building-permit fees are broadly comparable across Virginia localities. (schedule)

Real property in Hanover County is assessed by the Hanover County Real Estate Assessor's Office, which operates under the county's Department of Finance and Management Services. Virginia operates on an annual or biennial general-reassessment cycle under Va. Code § 58.1-3250 et seq.; Hanover conducts a general reassessment and publishes reassessment notices on a schedule set by the Board of Supervisors (Hanover's reassessment cycle is typically biennial, with the specific effective date and notice-mailing window published annually on the Real Estate Assessor's Office webpage and on each reassessment notice). An accessory dwelling added to a parcel is treated as 'new construction' and is picked up in the next assessment cycle following certificate of occupancy, producing an upward adjustment to the parcel's assessed value reflecting the added improvement. Unlike California's Prop 13 regime, Virginia does not acquisition-value-lock the existing primary dwelling — the whole parcel is reassessed to current fair market value (CFMV) in each reassessment cycle — so adding an ADU affects the marginal new-construction component plus any market-value drift on the underlying parcel from the reappraisal.

Assessment policy: Hanover performs a general reassessment on the cycle set by the Board of Supervisors under Va. Code § 58.1-3252 (which permits Virginia counties to reassess annually, biennially, or on a longer cycle up to six years, subject to the statutory framework). Hanover has historically used a biennial or shorter cycle for general reassessment, with reassessment notices mailed in advance of the tax year in which the new values take effect. Notices show the new land value, improvements value, and total assessed value. Accessory dwellings added to a parcel produce both (a) a new-construction adjustment reflecting the added improvements and (b) any general market-value drift on the parcel under the reassessment cycle's mass-appraisal models. Virginia applies the statewide constitutional requirement of fair-market-value assessment (Va. Const. art. X § 2; Va. Code § 58.1-3201) — assessments must reflect 100% of fair market value. The county's real-estate tax rate is set annually by the Board of Supervisors. Hanover has historically maintained a real-estate tax rate in the lower half of Central Virginia localities. For budgeting purposes, applicants adding an ADU should expect the ADU's construction cost to translate approximately to added assessed value, with any additional assessment lift coming from improved parcel utility, and should apply the then-current nominal tax rate to estimate the annual carrying-cost increase.

• wetland-overlay — Applicants should always pull a parcel's RPA / RMA overlay on the county GIS viewer before siting any detached accessory dwelling; a structure inside the RPA buffer will trigger administrative-review requirements at minimum, and frequently leads to relocation of the proposed building envelope outside the buffer as the cheapest compliance path. The Virginia Department of Environmental Quality (DEQ) provides statewide CBPA guidance at deq.virginia.gov/our-programs/water/chesapeake-bay. Hanover's CBPA program has been in place since the original statewide CBPA designation of Tidewater localities and has evolved through periodic Chapter 26 and companion-chapter amendments.
• flood-zone — FIRM maps published by FEMA are the authoritative flood-zone source; the county's GIS viewer overlays current effective FIRMs on the parcel layer. Finished-floor elevation requirements for residential construction in SFHAs typically require the lowest floor (including basement) to be at or above the base-flood elevation (BFE), with Hanover commonly imposing freeboard above BFE per its local ordinance consistent with NFIP minimum standards. Flood-zone status also affects flood-insurance cost under NFIP Risk Rating 2.0 (the 2021-2023 methodology reset). Rural Hanover's large-lot parcels frequently have a portion of the parcel in SFHA along a creek and a larger portion out of SFHA, making building-envelope siting the critical design question rather than whether the parcel is developable at all.
• airport-noise-zone — Applicants building an accessory dwelling near KOFP should check parcel status against any airport-overlay layer on the county GIS viewer. Height restrictions are the most common constraint for parcels within transitional surfaces; residential-use compatibility and a real-estate disclosure obligation may apply within designated noise contours. The county does not prohibit residential use within the airport overlay but does apply height limits and process additional notifications. Note: Hanover County Municipal Airport is a general-aviation field, not an air-carrier airport — the noise contours and FAA review footprint are meaningfully smaller than at a commercial-service airport like KRIC.
• historic-district — Register-listed (National or Virginia) status alone does NOT by itself create a local review requirement; only locally-designated historic-overlay district status does. However, federal preservation tax incentives (26 U.S.C. § 47 Historic Rehabilitation Tax Credit) and Virginia state rehabilitation tax credits (Va. Code § 58.1-339.2) do apply to register-listed properties and can materially improve the economics of an ADU-adjacent rehab if the property qualifies. The Virginia Department of Historic Resources (dhr.virginia.gov) administers the state registers and reviews state-tax-credit rehabilitation applications. Hanover-Caroline Historical Society and the Hanover Historical Society (affiliated with the Scotchtown property) are the primary non-governmental historical-resources organizations in the county.
• other — Applicants contemplating an ADU on a rural Hanover parcel should (a) pull the parcel's prior VDH septic-construction-permit file from the Chickahominy Health District (records are maintained for decades in most cases), (b) assess whether the existing drainfield has reserve capacity for the additional dwelling's load (VDH has per-bedroom loading standards), (c) obtain a soil-evaluation letter from a licensed Onsite Soil Evaluator if the existing permit file is incomplete or the drainfield is close to capacity, and (d) budget $15,000-$45,000 or more for drainfield expansion / replacement on typical Hanover soils, with higher costs in areas of poor percolation. This is a crucial no-surprises step because a rural Hanover ADU can be fully permitted by Chapter 26 and Building Inspections and still fail at VDH review on wastewater-capacity grounds.