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Fairfax County, VA Ordinances (2026)

Local rules and regulations for Fairfax County, Virginia. Population: 1,150,309.

Verified from official government sources

Note: County ordinances apply to unincorporated areas of Fairfax County. If you live within an incorporated city, that city's own rules take precedence over county-level regulations. We have city-specific rules for Fairfax, Herndon, and Vienna: check there if you live in one of those cities. All other areas in Fairfax County fall under the county rules shown below.

Browse Ordinances by Topic

Select a topic to see Fairfax County's rules on that subject.

Noise Ordinances

Barking Dogs

Some Restrictions

Fairfax County's noise ordinance makes it a violation for an owner to let a dog or other animal bark loud enough to be heard in a neighbor's closed home at night.

Amplified Music & Outdoor Sound

Some Restrictions

Outdoor loudspeakers and instruments on recreational grounds must stop by 10 p.m. and stay within the county's daytime sound-level table.

Construction Hours

Some Restrictions

Fairfax County bars outdoor construction, repair, demolition or grading noise between 9 p.m. and 7 a.m. Sunday through Thursday, and between 9 p.m. and 9 a.m. on Fridays, Saturdays and…

Decibel Limits

Some Restrictions

Fairfax County caps sound from industrial-district sources at 72 dBA by day and 65 dBA at night, measured at the property boundary.

Aircraft Noise

Significant Restrictions

Fairfax County restricts land use and mandates soundproofing near airports through its Airport Noise Impact Overlay District, covering three DNL noise-impact zones.

Vehicle Noise

Some Restrictions

Fairfax County prohibits modified exhaust, unnecessary engine revving, loud car stereos plainly audible at 50 feet, and horn use except as a warning. Violations are enforced under…

Leaf Blower Rules

Some Restrictions

Fairfax County's Noise Ordinance limits when power lawn equipment can run, and it singles out leaf blowers and chain saws for the strictest rule: never between 9 p.m. and 7 a.m. on any…

Quiet Hours

Some Restrictions

Fairfax County bars any sound plainly audible inside a neighbor's closed dwelling between 10 p.m. and 7 a.m. on weeknights, extending an hour later on weekends.

Cities in Fairfax County

These cities are located within Fairfax County and may have their own ordinances.

Communities in Fairfax County

These communities are in unincorporated Fairfax County. County ordinances apply directly to these areas.

Data Sources

Ordinance data for Fairfax County is sourced from the following official government references. Click any topic above for detailed citations.