Do you need a permit for a pool or hot tub in Fairfax County, VA?
It depends on the details of your project.
A pool and its decking count toward the 30 percent cap on covering the minimum rear setback.
Pool equipment may sit up to 5 ft into a setback but never within 5 ft of a lot line.
A pool can't go in a floodplain without a special exception.
A person last checked these rules on October 20, 2026. This is guidance only, so confirm with Fairfax County before you build.
Check your exact lot
Your zoning district sets the setbacks, and a flood zone can change the permit answer. Enter your address to see both.
Permits a pool or hot tub can need in Fairfax County
| Permit | When it applies |
|---|---|
| Grading or conservation plan (LDS) | Disturbing more than 2,500 sq ft needs a grading plan approved by Land Development Services. Most pools can use a conservation plan. |
| Architectural Review Board approval | This pool needs a building permit, and in a Historic Overlay District the Architectural Review Board (or Heritage Resources staff, for an accessory structure not visible from a historic property or major road) must approve it before the permit issues (Zoning Ordinance § 3101.6.C). |
| Building permit | Virginia's building code exempts only pools with 150 sq ft or less of surface that are under 24 in deep (USBC 108.2 item 8). |
| Electrical permit (pump, heater, lights, bonding) | Pool and spa wiring and bonding need an electrical permit.Medium confidence |
| Floodplain development permit | In a FEMA special flood hazard area all development needs a permit. |
| Chesapeake Bay (RPA) review | Any development or land disturbance in a Resource Protection Area generally needs county approval first. Sheds, garages, pools, gazebos and patios there need an exception with a public hearing. Some new decks can get an administrative waiver. |
| Geotechnical (soils) report | On mapped marine clay the Problem Soils Ordinance requires a soil report by a geotechnical engineer, with a slope stability analysis, for new construction and grading. |
Limits that apply citywide
| Location | Not in the front yard on lots of 36,000 sq ft or less; a pool is a freestanding accessory structure |
|---|---|
| Rear setback coverage | All accessory structures, the pool and its decking together may cover no more than 30% of the minimum rear setback |
| Pool equipment | May extend 5 ft into a setback if not within 5 ft of any lot line |
| Floodplain | Pools are not a permitted use in a floodplain without a special exception |
Local details
- The barrier around a pool needs its own building permit in Virginia, because pool-barrier fences are excluded from the fence exemption.
- Call 811 at least a few days before you dig footings or post holes. Utility locating is free.
- HOA covenants and deed restrictions can be stricter than city rules. Check yours before you build.
How to apply
Common questions
- When does a pool or hot tub need a building permit in Fairfax County?
- Virginia's building code exempts only pools with 150 sq ft or less of surface that are under 24 in deep (USBC 108.2 item 8). Pools of 150 sq ft or less and under 24 in deep are exempt anywhere in Virginia.
- Where do I apply for a pool or hot tub permit in Fairfax County?
- Apply through PLUS permitting portal, or call 703-222-0801.
Sources
- Fairfax County Zoning Ordinance § 5104 (grading) and § 5105 (floodplain). Checked 2026-10-21
Sod and soil may be removed from or added to any lot to a depth of not more 18 inches without approval of a grading plan if the total disturbed area is 2,500 square feet or less... [Floodplain] major fill includes any fill, regardless of amount, in an area …
- Fairfax County Zoning Ordinance § 3101.6.C, Historic Overlay Districts: building permits (enCodePlus). Checked 2026-10-23
(1) ARB review and approval is required before the issuance of a building permit by the Director and approval of a sign permit by the Zoning Administrator, as listed below... ARB review and approval is not required for building permits that are only for the…
- Virginia USBC, 13VAC5-63-80 Section 108.2, Exemptions from application for permit. Checked 2026-10-23
2. One story detached structures used as tool and storage sheds, playhouses, or similar uses, provided the building area does not exceed 256 square feet... 5. Fences of any height unless required for pedestrian safety as provided for by Section 3306 or used…
- 44 CFR 59.1, definition of development (NFIP). Checked 2026-10-19
Development means any man-made change to improved or unimproved real estate, including but not limited to buildings or other structures...
- 44 CFR 60.3, floodplain management criteria. Checked 2026-10-19
Require permits for all proposed construction or other development in the community...
- Virginia Chesapeake Bay Preservation Area Designation and Management Regulations (9VAC25-830-80, -140). Checked 2026-10-21
Land development may be allowed in the Resource Protection Area, subject to approval by the local government, only if it [is water dependent, is redevelopment, or fits the other listed cases]... The 100-foot wide buffer area shall be the landward component …
- Fairfax County LDS, FAQs on Resource Protection Areas (Chesapeake Bay Preservation Ordinance, Chapter 118). Checked 2026-10-21
Any development, land disturbing activity or other use within an RPA generally requires prior approval from the county... [Fences are allowed without an exception if they don't block surface flow or remove trees; sheds, detached garages, pools, gazebos and …
- Fairfax County LDS, Homeowner's Guide to Marine Clay. Checked 2026-10-21
Under the Problem Soils Ordinance (Chapter 107), a soil report prepared by a qualified geotechnical engineer is required for new construction and grading work in marine clay areas... Footings in marine clay must be at least 4 feet deep... A building permit …
- Fairfax County Zoning Ordinance § 4102.7.A(5), (6), (17), rear setback coverage, freestanding accessory structures, swimming pools. Checked 2026-10-21
All accessory structures and uses may cumulatively cover no more than 30 percent of the minimum rear setback on any lot located in a conventional residential district... [Coverage includes] children's play equipment, sports court, pool and associated deckin…
- Fairfax County Zoning Ordinance § 5100.2.D, setback regulations (corner lots, sight distance, permitted extensions). Checked 2026-10-21
[Sight distance] Points must be 30 feet from the property lines extended... Sight distance must be maintained between two horizontal planes, one of which is three and one-half feet, and the other ten feet above the established grade... [Extensions] heating,…