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SetbackIQ

Pools and hot tubs in Fairfax County, VA

A pool is a freestanding accessory structure: allowed in side and rear yards, counted toward the 30% rear setback coverage cap with its decking, and needing a building permit unless it's 150 sq ft or less and under 24 in deep.

A person last checked these rules on October 20, 2026. This is guidance only, so confirm with Fairfax County before you build.

The details

  • Pool and decking count toward the rear setback coverage limit. The BZA can raise it to 60% by special permit.High confidence
  • Pool pumps and equipment may extend 5 ft into a setback but not within 5 ft of a lot line.High confidence
  • The pool barrier needs its own permit. Barbed wire may top a pool fence only above 6 ft.High confidence
  • Pools aren't a permitted use in a floodplain without a special exception, and digging over 2,500 sq ft needs a grading or conservation plan.High confidence

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Common questions

How far from the lot line can a pool go, and what permits does it need in Fairfax County?
A pool is a freestanding accessory structure: allowed in side and rear yards, counted toward the 30% rear setback coverage cap with its decking, and needing a building permit unless it's 150 sq ft or less and under 24 in deep.

Sources

  1. Fairfax County Zoning Ordinance § 4102.7.A(6)-(7), freestanding accessory structures and fences. Checked 2026-10-20
    On a lot that is 36,000 square feet or less, accessory structures may not be located in the front yard... If the structure does not exceed eight and one-half feet in height, it may be located in any part of a side yard or rear yard... between eight and one-…
  2. 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,…
  3. 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…
  4. 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 …

Disclaimer: This is general information, not legal or professional advice for any one property. Codes change. SetbackIQ is not a zoning determination, a permit, or a survey, and it does not replace an architect, engineer, or lawyer. Confirm with your building and zoning offices before you build, buy, or sign a contract.