ADU Pass
Newington
ADU Pass helps homeowners in Newington, No 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
Newington benefits from Fairfax County's mature ALU framework — among the most ADU-friendly Virginia jurisdictions. Administrative Permit process (not legislative SUP), 40%/1,200 sqft cap, owner-occupancy, and standard health-and-safety review. The county already complies with most of SB531; the 2027 effective date will shift fee structure rather than rewrite the program.
Cost scenarios
| Scenario | Sq ft | Permit | Build | Total |
|---|---|---|---|---|
| minimum | 300 | $2,200 | $117,000 | $119,200 |
| 600 | 600 | $2,600 | $276,000 | $278,600 |
| midpoint | 750 | $2,700 | $352,500 | $355,200 |
| 1000 | 1,000 | $2,900 | $480,000 | $482,900 |
| maximum | 1,200 | $3,100 | $600,000 | $603,100 |
Fee breakdown (as of 2026-05)
Permitting process
Viability (permitted uses)
- Long-term rental: yes Long-term rental permitted on Newington ALU lots with owner-occupied principal dwelling. Fort Belvoir civilian and military workforce drives steady year-round demand.
- Short-term rental: with-restrictions Fairfax County registers STRs; Newington's proximity to Fort Belvoir, I-95, and the Fairfax County Parkway drives steady STR demand from military relocations and DC-area visitors. STR operator must maintain owner-occupancy under both STR and ALU rules.
- Office rental: no ALU must remain a dwelling unit under Fairfax §4-505.
- Home office: yes Home occupation permitted under Fairfax standards.
- Studio / workshop: yes Personal studio / workshop use is a permitted accessory use.
- Agriculture: with-restrictions Limited agricultural use permitted in R-1; Newington is mostly suburban with little farming. Urban agriculture (chickens, beekeeping) is regulated separately.
- Relative support: yes Family-occupancy ALU is the canonical Fairfax use case — originally designed for elderly relatives. Owner-occupancy of the principal dwelling required.
Incentives
Contacts
Utilities
- Water: Fairfax Water (most of Newington); a few outlying parcels on private well · 21d connect · $4,800
- Sewer: Fairfax County Wastewater Management (treated at Noman M. Cole Pollution Control Plant — Lorton) · 28d connect · $6,800
- Electric: Dominion Energy Virginia · 21d connect · $1,900
- Gas: Washington Gas · 28d connect · $1,700
Property values & taxes
Construction timeline
Realistic total: best 7mo · typical 11mo · worst 16mo
Modular pathway inspectors are occasional with modular
I-95, Fairfax County Parkway, and Backlick Road handle modular delivery; established suburban Newington has typical NoVA module-width and crane access constraints.
Financing
Insurance impact
HOA prevalence & preemption
Newington has a high HOA prevalence — mid-century subdivisions often without HOAs, but newer townhome and condo developments (Springfield Forest, Newington Heights area) under active HOAs. HOA covenants frequently restrict ADU configurations even where Fairfax County would permit them.
Regulatory overlays (2)
- other
Newington is bisected by I-95; parcels within 500 ft of the highway face elevated traffic-noise exposure that ALU rentability and Fairfax acoustic-mitigation guidance address. - flood-zone
Limited flood-zone exposure along Pohick Creek; most Newington parcels are outside SFHA.
Technical envelope (climate & building code)
Climate & energy code
Building code
Amendments:
- Amendment
Contractor market (aggregate)
Legal history (timeline)
Current ordinance: Fairfax County Zoning Ordinance §4-505 (Accessory Living Unit) — Administrative Permit, adopted 1990-01-01, last amended 2017-03-21
- 1990-01-01 — Fairfax County Accessory Living Unit (ALU) program adopted (county-ordinance)
Fairfax County established the Accessory Living Unit program circa 1990 as one of the early Virginia ADU frameworks. Originally limited to interior conversions for elderly or disabled relatives; subsequently liberalized.
Effect: Pioneer Virginia ADU framework — informed later state legislation including SB531. - 2017-03-21 — Fairfax County ALU expansion — detached ALUs and broader eligibility (county-ordinance)
Fairfax County Board of Supervisors expanded the ALU program in 2017 to allow detached ALUs and to remove some age/disability restrictions on occupants, while retaining owner-occupancy and the 40%/1,200 sqft cap.
Effect: Created the modern Newington ALU pathway — administrative permit, detached allowed, broad occupant eligibility. - 2026-04-14 — Virginia SB531 signed — statewide by-right ADU mandate (state-law)
Effective July 1, 2027: by-right ADU in SFR zones, $500 permit-fee cap, consanguinity-restriction prohibition. Fairfax County's existing ALU program qualifies for grandfathering as it pre-dates January 1, 2026.
Effect: Fairfax County ALU rules survive SB531 with minor permit-fee adjustments. Newington ADU economics largely unchanged.
Known issues (2)
- policy-review — Fairfax County conducted ALU program review in 2024-2025 considering further liberalization (two ALUs per parcel, removal of owner-occupancy requirement). No ordinance change adopted as of 2026-05-13. (source)
- other — HOA restrictions are the binding constraint on many Newington parcels — Fairfax allows the ALU but HOA covenants prohibit it. Verify HOA documents before committing to ALU plans.
County: no attribution (synthetic bucket)
No county
This city sits in the state's "no county" bucket — its ADU rules derive directly from state law and city ordinance without a county intermediary. No county-level sections apply.
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
- 22122
Post Office
- 8253a Backlick Rd, 22122