Orange

Orange County does NOT maintain a standalone accessory-dwelling-unit ordinance with dedicated definitional and standards sections analogous to Fairfax or Fauquier. ADUs in Orange County are regulated indirectly: the zoning ordinance defines 'dwelling, single-family detached' and 'accessory use' / 'accessory structure,' and the per-district use tables in the A (Agricultural), RR (Rural Residential), and R-1/R-2/R-3/R-4 residential districts permit one principal dwelling per lot with accessory structures customarily incidental to the principal use. A second dwelling unit on the same lot is typically handled either as (a) a 'tenant house' / 'farm labor dwelling' allowance in the A Agricultural district subject to minimum lot area and a special-use permit, (b) a 'guest house' as an accessory structure without kitchen facilities, or (c) a family-care / in-law arrangement administered through the zoning administrator. A fully independent detached ADU with its own kitchen on a residential-district parcel generally requires a Special Use Permit from the Board of Supervisors after Planning Commission review. Applicants should confirm the current Section text and the applicable district's use table with the Zoning Administrator before committing to a pro forma — the ordinance has been amended repeatedly since the 2013 update and specific ADU-like allowances vary by district.

Orange County administers several overlay regimes that bear materially on ADU projects: (1) a Floodplain Overlay District tied to FEMA Special Flood Hazard Areas along the Rapidan River, the Robinson River, and their tributaries, administered by the Department of Planning and Zoning; (2) locally-adopted Historic Overlay Districts reviewed by the county (in addition to separately-administered town historic overlays in the Town of Orange and the Town of Gordonsville, and the federally-significant Montpelier Station area); (3) a substantial footprint of conservation easements held by the Virginia Outdoors Foundation (VOF) and the Piedmont Environmental Council (PEC), particularly concentrated in the rural western and southern parts of the county; (4) the Chesapeake Bay Preservation Act does NOT reach Orange County — the county is inland and outside the Tidewater CBPA jurisdiction. Orange County has no coastal-commission jurisdiction, no CalFire-equivalent WUI regulatory overlay (Virginia has no statewide WUI overlay), and no seismic-retrofit overlay.

• Floodplain Overlay District
• Orange County Historic Overlay Districts (including the Montpelier Station vicinity, Barboursville, and rural historic corridors)
• Conservation Easement Overlay (VOF- and PEC-held easements)
• Montpelier viewshed and heritage-tourism landscape

Orange County's Department of Planning and Zoning handles zoning permits, Special Use Permits, site plan review, and subdivision review for every parcel in the county except those inside the Town of Orange and the Town of Gordonsville (which administer their own zoning). The Department of Building Inspections issues building permits and trade permits for the same 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-district tenant/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) - Rappahannock-Rapidan Health District construction permit for well and/or septic on parcels not served by public water or sewer (most rural Orange County parcels), (6) a Floodplain Development Permit if any portion of the parcel is within the Floodplain Overlay District, and (7) a Historic District review if the parcel is within a designated historic overlay (Orange County has several — the Montpelier Station area, the Barboursville historic district, and portions of rural Orange — in addition to the separate town historic overlays).