Richmond County
ADU Pass helps homeowners in Richmond County, Virginia navigate the permit paperwork for building an accessory dwelling unit. We cover 4 cities and 5 ZIP codes in this county.
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County ADU details
County ADU ordinance
Richmond County does NOT maintain a standalone accessory-dwelling-unit ordinance with dedicated definitional and dimensional standards. ADUs in Richmond County are regulated indirectly through the Zoning Ordinance's treatment of 'accessory use,' 'accessory structure,' 'guest house,' and 'second dwelling' or 'family-member dwelling' in combination with the per-district use schedules. In the A-1 Agricultural district, which covers the great majority of county acreage, a 'family-member dwelling' or farm-labor tenant dwelling is typically permitted subject to minimum lot area (commonly 3 to 5 acres or more depending on the specific allowance), demonstrated agricultural or family-member use, and Zoning Administrator approval; a fully independent second dwelling for non-family occupancy on a single lot typically requires a Special Use Permit from the Board of Supervisors after Planning Commission recommendation. In the R-1 and R-2 residential districts, accessory structures (workshops, detached garages, no-kitchen guest cottages) are permitted by-right subject to setback, height, and lot-coverage standards; an independent second dwelling in those districts is rare and would typically require an SUP. Applicants should confirm current ordinance text with the Richmond County Building and Land Use Office before committing to a project pro forma.
County permitting (unincorporated parcels)
Richmond County's Building and Land Use Office handles zoning permits, Special Use Permits, site plan review, subdivision review, Chesapeake Bay Preservation District administration, and building-permit issuance and inspection for every parcel in the county except those inside the Town of Warsaw (which administers its own zoning and permitting) and state/federal land. A typical ADU-like permit bundle (where a second dwelling is permitted) includes: (1) a Special Use Permit from the Board of Supervisors with Planning Commission recommendation, unless the parcel qualifies for an A-1 family-member or farm-labor dwelling allowance, (2) a Zoning Permit confirming use compliance and district setback compliance, (3) a Building Permit with stamped residential plans, (4) Electrical, Plumbing, and Mechanical trade permits, (5) a Virginia Department of Health (VDH) - Three Rivers Health District construction permit for well and/or septic on parcels not served by public water or sewer (which is the great majority of parcels — public sewer is essentially limited to the Town of Warsaw service area), (6) a Floodplain Development Permit if any portion of the parcel intersects the mapped Special Flood Hazard Area, which applies to a substantial fraction of parcels along the Rappahannock River frontage and tidal creeks, (7) a Chesapeake Bay Preservation Act review — Richmond County IS a Tidewater locality subject to the CBPA, with Resource Protection Area (RPA) and Resource Management Area (RMA) rules applying across the county, (8) a Virginia Marine Resources Commission (VMRC) joint permit for any work below mean high water or encroaching on tidal wetlands, (9) US Army Corps of Engineers permit where federal waters are involved.
County assessor
Richmond County real estate is assessed by the Office of the Commissioner of the Revenue working with the Real Estate Assessment Office. Richmond County operates on a periodic general-reassessment cycle under Va. Code § 58.1-3252; the county historically uses a multi-year cycle with reassessments typically contracted to an outside assessment firm. An ADU or second-dwelling addition is captured through the supplemental real-estate-improvement process under Va. Code § 58.1-3292: the Commissioner of the Revenue receives the building-permit record and Certificate of Occupancy from Building and Land Use, and the Real Estate Assessment Office adds the ADU's assessed value to the parcel's land and improvement base, prorated to the completion date. The primary dwelling is NOT re-valued off-cycle as a result of the ADU addition.
Assessment policy: An ADU 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 Building and Land Use, the Real Estate Assessment Office prorates the supplemental assessment from the completion date through the end of the tax year under Va. Code § 58.1-3292. The ADU is added at its assessed fair-market value (typically derived from cost approach using Marshall & Swift residential cost multipliers calibrated to the current reassessment-cycle base) on top of the parcel's existing land and improvement value; the existing primary dwelling is NOT revalued off-cycle. There is no Richmond-County-specific ADU assessment exemption. Standard Virginia real-estate tax relief programs (elderly and disabled relief under Va. Code § 58.1-3210 as adopted locally, disabled-veteran exemption under Va. Code § 58.1-3219.5) apply to the homeowner's principal residence. Land Use Assessment under Va. Code § 58.1-3229 et seq. is locally adopted and consequential — Richmond County has substantial agricultural and silvicultural land in active use-value enrollment, and the ADU's parcel impact on that enrollment should be evaluated case-by-case.
County overlays (4)
Richmond County administers several overlay regimes that bear materially on ADU projects, with coastal / tidal exposure being the dominant physical constraint along the Rappahannock River frontage. The relevant overlays are: (1) a Floodplain Overlay District tied to FEMA Special Flood Hazard Areas, which covers a meaningful share of waterfront and tidal-creek-adjacent parcels along the Rappahannock and its tributaries; (2) Chesapeake Bay Preservation Act jurisdiction across the entire county (Richmond is a Tidewater locality designated under Va. Code § 62.1-44.15:67 et seq.), with Resource Protection Area (RPA) buffers of 100 feet from perennial water bodies and tidal wetlands and Resource Management Area (RMA) coverage on much of the remaining land; (3) Virginia Marine Resources Commission (VMRC) tidal-wetlands and subaqueous-bottom jurisdiction reaching any project touching tidal waters or wetlands along the Rappahannock; (4) NRHP-listed historic resources scattered across the county including the Menokin plantation (the home of Francis Lightfoot Lee, signer of the Declaration of Independence, NRHP-listed) and other colonial-era plantations and village cores; the Town of Warsaw maintains its own historic-preservation posture. Richmond County has NO California-style coastal commission, NO CalFire-equivalent WUI regulatory overlay, and NO seismic-retrofit overlay.
Known county issues (7)
- other — ADU pro formas that would pencil as by-right or ministerial projects in jurisdictions with codified ADU ordinances require a discretionary SUP cycle in Richmond County. This adds roughly 90-150 days of wall-clock, a separate SUP application fee ($400-$1,500), neighbor-notification and public-hearing burdens, and case-by-case conditions imposed by the Board of Supervisors. Applicants should budget accordingly and confirm whether an A-1 family-member or farm-labor dwelling allowance or a no-kitchen 'guest cottage' accessory structure path can satisfy the use case without an SUP.
- other — Floodplain Development Permits, elevation certificates ($400-$1,200 each by a private licensed surveyor, typically before AND after construction), and elevated-foundation construction are recurring line items on Rappahannock-waterfront ADU projects. Substantial Improvement review — the NFIP 50% cumulative-cost threshold — can force full NFIP compliance on an existing primary dwelling if ADU construction cost tips the threshold. For typical inland A-1 ADU projects, floodplain costs are nil. Applicants on Rappahannock or tidal-creek frontage should pull the FEMA FIRM panel and an elevation certificate BEFORE pricing a project.
- other — An ADU proposed on a parcel with any RPA overlap must avoid the 100-foot buffer or pursue a Water Quality Impact Assessment (WQIA) exception. Inland A-1 ADU projects with no nearby tidal water typically have RMA-only exposure and modest CBPA review burden. Waterfront and tidal-creek-adjacent projects face the same RPA constraints as Lancaster, Northumberland, and Westmoreland counties. Typical CBPA delineation and review adds 30-60 days and $500-$2,500 in soft costs to waterfront projects.
- other — VDH well-and-septic evaluation is a separate timeline from county permit review. Applicants should initiate VDH application in parallel with — not after — the county pre-application inquiry. Parcels with marginal soils may need AOSS design ($15k-$40k incremental over conventional). Septic-driven dwelling-unit caps at the parcel level (a fixed bedroom-count drainfield design) frequently constrain ADU bedroom counts; a 3-bedroom primary plus a 1-bedroom ADU may require redesigned drainfield capacity.
- policy-review — Applicants should confirm the current ordinance text with the Building and Land Use Office (804-333-3415) rather than relying on prior summaries, and should be alert to General Assembly session outcomes in any year when an ADU preemption bill is introduced. A pre-application zoning inquiry is strongly recommended before architectural or engineering investment — the Zoning Administrator's interpretation is frequently the difference between a by-right accessory-structure path and a full SUP cycle.
- other — ADU research, permitting practice, ordinance text, fees, and timelines for the rural Richmond County are wholly distinct from those for the City of Richmond. Confusion is common in titling and address auto-completion. Applicants and downstream consumers of this research should verify which Richmond they are looking at — the Northern Neck rural county is governed under co.richmond.va.us; the independent city is under rva.gov / richmondgov.com. The City of Richmond is filed under virginia/no_county/richmond.json in the ADU Pass research corpus.
- other — Applicants should plan for in-person submittal of permit packages and call ahead to confirm intake mode and fee schedule. Coordinating VDH well/septic, CBPA delineation, and (where applicable) floodplain review in parallel rather than sequentially is the single biggest time-saver. For applicants accustomed to fully-online Accela or Tyler portals in larger Virginia jurisdictions, the paper-or-counter-only intake mode here is a meaningful workflow difference.
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.