Before You Build in Fairfax, VA: Permit & Rule Checklist (2026)

Fences at or under 7 feet in the City of Fairfax typically do not require a building permit but still must comply with zoning setbacks, height limits, and sight-distance rules. Fences over 7 feet, pool enclosures, and retaining walls over 3 feet require permits under the Virginia USBC.

Residential fences in the City of Fairfax are typically limited to 4 feet in front yards and 6 to 7 feet in side and rear yards under the zoning ordinance. Fences over these heights require a building permit and often a zoning variance, and corner lots must meet sight-distance triangles.

Residential swimming pools in the City of Fairfax must be enclosed by a barrier at least 48 inches tall with self-closing, self-latching gates under the Virginia Uniform Statewide Building Code. The barrier applies to in-ground pools, above-ground pools, and permanent hot tubs without lockable covers.

Virginia has no statutory Good Neighbor Fence Act, and the City of Fairfax does not require neighbors to share fence costs. Each owner is responsible for fences on or serving their property unless a private written agreement provides otherwise. Disputes are handled as civil matters.

All residential swimming pools in the City of Fairfax require a building permit before construction. Permits are issued by the City Building Department under the Virginia USBC. Required submittals include site plan, zoning setbacks, electrical, plumbing, barrier plan, and homeowner or contractor information. Multiple inspections are required including pre-pour, electrical, plumbing, barrier, and final.

City of Fairfax Code §10-621(b) requires a six-foot-high fence to surround all residential swimming pools. Outdoor pools, spas, and hot tubs must also comply with International Swimming Pool and Spa Code §305 (adopted via the Virginia Uniform Statewide Building Code, 13VAC5-63), which mandates a 48-inch minimum barrier, no openings allowing passage of a 4-inch sphere, and a 3-foot clear zone between the barrier and any climbable structure. Local fencing authority is granted under Va. Code §15.2-921.

Detached garages in the City of Fairfax require a building permit regardless of size and must comply with residential zoning setbacks. Typical rear setbacks are 5 to 10 feet and side setbacks 5 feet for R-1 and R-2 districts. Maximum height usually 15 to 20 feet. Lot coverage and floor area limits apply. Converting a garage to living space requires separate permits and ADU review if adding kitchen.

The City of Fairfax (independent city) currently allows Accessory Dwelling Units only as attached units within a single-family home under Zoning Ordinance §3.5.5.D.1. ADUs may not exceed 35% of the principal dwelling's size and may have no more than two bedrooms. Either the main or accessory unit must be owner-occupied. Detached ADUs are not currently permitted, and short-term rentals (Airbnb, etc.) are not allowed in the City.

In the City of Fairfax, sheds under 256 square feet on residential lots typically do not require a building permit under the Virginia Uniform Statewide Building Code, but zoning approval is required. Sheds must meet rear and side setbacks, typically 5 to 10 feet, and cannot be placed in front yards. Electrical and plumbing work requires separate permits. HOA approval may be required.

The City of Fairfax follows Virginia's 4 PM Burning Law during spring fire season (February 15 through April 30), which prohibits open burning before 4 PM within 300 feet of woodland. The Virginia Department of Forestry may declare additional burn bans during drought. The City Fire Marshal may issue local bans during elevated fire danger or air quality alerts. All open burning of yard waste is already prohibited in the city.

Portable fire pits and chimineas are permitted in the City of Fairfax under state fire code. Recreational fires must be ≤3 ft diameter, ≥25 ft from structures, dry wood only. Multi-family restrictions apply per Statewide Fire Prevention Code §307.4.4.

The City of Fairfax has a strong tree preservation program under its tree conservation ordinance. Removal of significant trees on private property requires evaluation and, in many cases, a permit or replacement planting. Trees in the public right-of-way, on city property, and within environmental quality corridors are strictly protected. Illegal removal can result in fines and mandatory replacement at replacement value.

The City of Fairfax purchases water from Fairfax Water (Fairfax County Water Authority) and follows regional drought response protocols. During declared droughts, outdoor watering is restricted to odd/even days and morning/evening hours. The Virginia DEQ issues statewide drought watches and warnings. Mandatory restrictions typically prohibit daytime irrigation, car washing, and non-essential outdoor use.