ADU Pass
Jamesville
ADU Pass helps homeowners in Jamesville, Northampton 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
Co-management exception: Jamesville is unincorporated, so the Northampton County Zoning Ordinance, Building Inspections, and permitting forms are the SOLE applicable instruments. The CBPA RPA buffer applies aggressively here because Nassawadox Creek and its tributaries run directly through the village footprint. SB 531 will introduce statewide by-right allowance July 1, 2027.
Cost scenarios
| Scenario | Sq ft | Permit | Build | Total |
|---|---|---|---|---|
| minimum | 200 | $1,900 | $53,000 | $54,900 |
| 600 | 600 | $1,900 | $159,000 | $160,900 |
| midpoint | 550 | $1,900 | $145,750 | $147,650 |
| maximum | 900 | $1,900 | $238,500 | $240,400 |
Fee breakdown (as of 2026-05)
Permitting process
Viability (permitted uses)
- Long-term rental: yes Long-term rental permitted under Virginia Residential Landlord and Tenant Act.
- Short-term rental: with-restrictions Northampton County STR regulation applies; SUP or registration with Zoning Administrator required.
- Office rental: with-restrictions Detached office rental requires home-occupation permit; A and RR districts have limited commercial-use allowances.
- Home office: yes Home occupation permitted with limits on signage, customer traffic, outside storage.
- Studio / workshop: yes Personal studio is a permitted accessory use.
- Agriculture: yes Bona fide agriculture is the principal allowed use in A and RR districts; tidal-creek aquaculture is common.
- Relative support: yes Family-member dwellings permitted in A and RR districts subject to minimum lot acreage.
Contacts
Staff: Northampton County Zoning Administrator (Zoning Administrator), Northampton County Building Inspections (Building Official), VDH Eastern Shore Health District (Environmental Health (well/septic construction permits))
Utilities
- Water: Private well (no public water service to Jamesville; VDH Eastern Shore Health District oversees private wells) · 60d connect · $8,500
- Sewer: Private septic (no public sewer; AOSS systems frequent due to Bay-side soils and shallow groundwater) · 90d connect · $16,000
- Electric: A&N Electric Cooperative · 30d connect · $2,400
- Gas: Bottled propane (no natural-gas distribution on the Eastern Shore) · 14d connect · $1,900
Property values & taxes
Construction timeline
Realistic total: best 11mo · typical 17mo · worst 28mo
Modular pathway inspectors are occasional with modular
Financing
Insurance impact
HOA prevalence & preemption
Virginia has no HOA-ADU preemption. Jamesville is overwhelmingly historic single-family on individually-deeded waterfront and farm lots without HOA covenants.
Regulatory overlays (2)
- wetland-overlay
Jamesville sits along Nassawadox Creek and its tributaries; nearly every parcel touches the 100-foot RPA buffer or the RMA. RPA encroachment requires a Water Quality Impact Assessment and is the typical case. (map) - flood-zone
Much of Jamesville is at 5-15 ft elevation and within FEMA Special Flood Hazard Area; AE zone is the typical mapping with portions of VE zone along the wharf frontage. Floodplain Development Permit, elevation certificate, and finished floor above BFE plus Virginia freeboard required. (map)
Technical envelope (climate & building code)
Climate & energy code
Building code
Amendments:
- Amendment
- Amendment
- Amendment
Contractor market (aggregate)
Legal history (timeline)
Current ordinance: Northampton County Zoning Ordinance (Chapter 154), A / RR / V district standards governing Jamesville, adopted 1989-01-01, last amended 2024-01-01
- 1880-01-01 — Jamesville Wharf established on Nassawadox Creek as Bay-side fishing landing (designation)
Boggs Wharf and the Jamesville fishing wharf established the village's anchor along the Nassawadox Creek tidal system in the late 19th century.
Effect: The village footprint formed around the wharf and is today substantially within the Chesapeake Bay Preservation Act RPA buffer. - 1988-07-01 — Chesapeake Bay Preservation Act (Va. Code Section 62.1-44.15:67 et seq.) (state-statute)
Virginia required Tidewater localities including Northampton to adopt RPA and RMA overlays.
Effect: Jamesville parcels along Nassawadox Creek are aggressively constrained by the 100-ft RPA buffer; most of the historic village core is within the RMA. - 2026-04-14 — Virginia SB 531 (2026) — Statewide By-Right Accessory Dwelling Unit Act (state-statute)
Signed April 14, 2026; effective July 1, 2027. Statewide by-right ADU allowance preempting local prohibitions in most residential zones.
Effect: Will reach Jamesville via Northampton County effective July 1, 2027 unless the County adopts a conforming ADU ordinance earlier.
Known issues (2)
- other — RPA review adds 30-60 days and can preclude detached-ADU siting near the creek; interior conversion of the principal dwelling is often the only feasible path.
- other — AOSS adds $15k-$40k to project cost and 60-120 days of VDH design and queueing time.
Northampton County — county ADU rules and overlays
County ADU ordinance
Northampton County does NOT maintain a standalone accessory-dwelling-unit ordinance with dedicated definitional and dimensional standards. ADUs in Northampton County are regulated indirectly through the Zoning Ordinance's treatment of 'accessory use,' 'accessory structure,' 'guest cottage,' and 'family dwelling' (terms used in the ordinance for limited second-dwelling allowances) in combination with the per-district use schedules. In the A (Agriculture) and RR (Rural Residential) districts, which cover the great majority of county acreage outside the village centers, a 'family-member dwelling' or farm-labor tenant dwelling is typically permitted subject to minimum lot area (commonly 5 to 10 acres depending on the district), agricultural-use demonstration, and Zoning Administrator approval; a fully independent second dwelling for non-family occupancy typically requires a Special Use Permit from the Board of Supervisors after Planning Commission recommendation. In the V (Village) and VC (Village Commercial) districts that cover the historic village centers (Eastville, Nassawadox, Franktown, Cheriton, Machipongo, etc.), a 'guest cottage' or detached accessory structure without independent kitchen facilities is generally permitted as a by-right accessory structure subject to setback, height, and lot-coverage standards; a second independent dwelling on the same parcel requires an SUP. In the Waterfront (W) and HC (Historic Commercial) districts, additional overlay constraints and Historic District review apply. Applicants should confirm current ordinance text with the Zoning Administrator before committing to a project pro forma — the ordinance has been amended periodically and specific ADU-like allowances vary by district and by interpretation of the 'customarily incidental' accessory-use standard.
County regulatory overlays
Northampton County administers several overlay regimes that bear materially on ADU projects, and coastal exposure is the single most important physical constraint on county land use. The relevant overlays are: (1) a Floodplain Overlay District tied to FEMA Special Flood Hazard Areas, which covers an unusually large share of the county because the entire county is a narrow low-elevation peninsula (maximum elevation ~50 feet, median parcel elevation closer to 15-25 feet) with Chesapeake Bay on the west, Atlantic barrier islands and lagoons on the east, and extensive internal tidal creek and marsh systems; (2) Chesapeake Bay Preservation Act jurisdiction across the entire county (Northampton 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 nearly all remaining landward extent; (3) Virginia Marine Resources Commission (VMRC) tidal-wetlands and subaqueous-bottom jurisdiction reaching any project touching tidal waters, wetlands, dunes, or beaches; (4) the Eastern Shore of Virginia National Wildlife Refuge and the Fisherman Island National Wildlife Refuge (federal refuge land near the southern tip of the peninsula — the Chesapeake Bay Bridge-Tunnel north terminus is adjacent to the Fisherman Island refuge and federal-land restrictions apply nearby); (5) the Airport Safety Overlay around the Accomack County Airport and the smaller general-aviation strip at Eastville (Northampton Airport); (6) locally-adopted historic overlays and NRHP-listed rural corridors including the Eastville Historic District (one of the oldest continuously functioning county-seat complexes in Virginia, with records going back to 1677), the Hungars Parish Historic District, Cape Charles Historic District (inside the Town of Cape Charles and administered there), and numerous NRHP-listed plantations and village cores. Northampton County has NO California-style coastal commission (Virginia has no coastal-commission analog; coastal regulation flows through the CBPA, the VMRC for tidal-wetlands permits, and local ordinances), NO CalFire-equivalent WUI regulatory overlay (Virginia has no statewide WUI overlay), and NO seismic-retrofit overlay. However, the combination of pervasive floodplain, pervasive CBPA, regular VMRC joint-permit triggers, and federal refuge proximity makes this one of the most overlay-dense rural counties on the Atlantic seaboard.
- Floodplain Overlay District
- Chesapeake Bay Preservation Act (CBPA) Resource Protection Area and Resource Management Area
- Virginia Marine Resources Commission (VMRC) tidal-wetlands, subaqueous-bottom, and sand-dune jurisdiction
- Eastern Shore of Virginia National Wildlife Refuge and Fisherman Island National Wildlife Refuge
- Airport Safety Overlay (Accomack County Airport north of the county line; Northampton Airport near Eastville)
- Eastville Historic District, Hungars Parish Historic District, and NRHP-listed rural corridors
County permitting (unincorporated parcels)
Northampton County's Department of Planning, Permitting, & Enforcement handles zoning permits, Special Use Permits, site plan review, and subdivision review for every parcel in the county except those inside the Town of Cape Charles (which administers its own zoning and permitting) and federal refuge land. Building Inspections issues building permits and trade permits for the same non-town, non-federal territory. 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 / RR 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) - Eastern Shore 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 coverage is limited to portions of Cape Charles, Exmore, Nassawadox, and small service-district pockets), (6) a Floodplain Development Permit if any portion of the parcel is within the mapped Special Flood Hazard Area — which is a LARGE fraction of parcels in Northampton County because the county is a narrow peninsula with Chesapeake Bay on the west, the Atlantic barrier islands and lagoons on the east, and extensive tidal creek and marsh systems inland, (7) a Chesapeake Bay Preservation Act review — Northampton County IS a Tidewater locality subject to the CBPA, with Resource Protection Area (RPA) and Resource Management Area (RMA) rules applying across nearly the entire county given its tidal geometry, (8) a Virginia Marine Resources Commission (VMRC) permit for any work below mean high water or encroaching on tidal wetlands, (9) a US Army Corps of Engineers permit where federal waters are involved, and (10) Historic District review if the parcel is within the Eastville Historic District, the Hungars Parish Historic District, or another designated local or NRHP-listed overlay.
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
- 23398
Post Office
- 6010 Occohannock Neck Rd, 23398