Rockingham County

Rockingham County's Department of Community Development issues ADU building permits for every parcel in the county except those inside the independent city of Harrisonburg (which operates its own building department and zoning ordinance) and, for zoning matters, those inside the Towns of Bridgewater, Broadway, Dayton, Elkton, Grottoes, Mount Crawford, and Timberville where the town has displaced the county code. All unincorporated communities including Penn Laird, McGaheysville, Massanutten, Keezletown, Linville, Singers Glen, Lacey Spring, Fulks Run, Bergton, Cross Keys, and Port Republic route through the county. A typical Rockingham County ADU permit bundle includes: (1) a Zoning Permit from the county Planning and Zoning Division confirming district eligibility, setbacks, and any overlay triggers, (2) a Building Permit with stamped residential plans filed with the Building Inspections Division, (3) Electrical, Plumbing, and Mechanical trade permits, (4) a Virginia Department of Health onsite-sewage / well construction permit from the Central Shenandoah Health District for parcels not served by public water and sewer (the majority of county parcels), (5) a Floodplain Development Permit if any portion of the parcel is within the mapped 100-year floodplain under the county's Floodplain Overlay, and (6) any town-level review if the parcel is inside one of the seven incorporated towns.

Rockingham County real estate is assessed by the Office of the Commissioner of the Revenue together with the Real Estate / Reassessment Office, operating on a four-year general reassessment cycle as permitted by Va. Code § 58.1-3252. An ADU addition is captured through the real-estate-improvement / new-construction supplemental process under Va. Code § 58.1-3292: the Commissioner of the Revenue receives the building-permit record and Certificate of Occupancy from Community Development, and the ADU's assessed value is added 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. Separately, the Rockingham County Treasurer collects real-estate tax on the combined assessment.

Assessment policy: An ADU is captured as a real-estate improvement under Va. Code Title 58.1 Subtitle III Chapter 32 (Real Property Tax). On receipt of the building permit and the Certificate of Occupancy from Community Development, the Commissioner of the Revenue's Real Estate Division prorates a 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 a cost approach using Marshall & Swift residential cost multipliers at the current reassessment-cycle base, or a comparable sales approach where market evidence exists for similar accessory-dwelling additions) on top of the parcel's existing land and improvement value. The existing primary dwelling is NOT revalued off-cycle as a result of the ADU. There is no Rockingham-County-specific ADU assessment exemption. Virginia's standard real-estate tax relief programs apply: elderly and disabled relief under Va. Code § 58.1-3210 (administered by the county under its local-option income and net-worth thresholds), disabled-veteran exemption under Va. Code § 58.1-3219.5 (100% permanent service-connected disability), and surviving-spouse-of-KIA exemption under Va. Code § 58.1-3219.9; none of these create a separate carve-out for the ADU itself, though they apply to the parcel as a whole where the homeowner qualifies and the principal residence is on the parcel. Separately, Rockingham County maintains a significant Land Use (use-value) assessment program under Va. Code § 58.1-3230 et seq. for agricultural, horticultural, forest, and open-space parcels; adding an ADU to a Land-Use-enrolled parcel does not automatically remove the parcel from Land Use but the footprint of the ADU and any associated curtilage may be assessed at fair market value while the remainder continues at use value. Roll-back tax consequences under § 58.1-3237 should be reviewed before construction.

Rockingham County administers three overlay regimes that bear materially on ADU projects: (1) a Floodplain Overlay District tied to FEMA Special Flood Hazard Areas along the North River, South Fork Shenandoah River, Dry River, Smith Creek, Cooks Creek, and other Shenandoah Valley drainages; (2) Agricultural-Preservation and rural-preservation overlays reflecting the county's strong poultry and livestock economy and the visual character of US 33, US 11, and I-81 corridors plus the Skyline Drive / Shenandoah National Park and George Washington National Forest gateway routes; and (3) a public water-and-sewer service-area framework run by the Harrisonburg-Rockingham Regional Sewer Authority (HRRSA) and the Rockingham County Public Works / Utilities Division that sharply separates ADU feasibility inside vs. outside those service areas. The Massanutten resort area carries its own density and STR-related planning context reflecting its history as a Planned Community / Large-Scale Development. Rockingham County has NO coastal-commission jurisdiction (it is entirely inland, far outside the Chesapeake Bay Preservation Act boundary), NO CalFire-equivalent WUI regulatory overlay (Virginia has no statewide WUI program; the Virginia Department of Forestry coordinates wildfire response without a permit-constraining overlay), NO seismic-retrofit overlay (standard IRC/IBC provisions as adopted in the Virginia Uniform Statewide Building Code govern), and NO FAA Part 150 airport-noise overlay imposed on surrounding parcels (Shenandoah Valley Regional Airport / KSHD sits partly in Rockingham County with commercial service but no Part 150 noise-exposure overlay is in force).

• Rockingham County Floodplain Overlay District
• Rockingham County Water and Sewer Service Area / HRRSA Overlay
• Agricultural-Preservation and Rural-Preservation Context (Poultry Industry, Shenandoah National Park, George Washington National Forest, Conservation Easements)