Data Centers & Crypto Mining in Fairfax County, VA (2026)
2 rules for unincorporated Fairfax County, Virginia.
Verified from official government sources
Data Center Zoning & Siting
Fairfax County allows data centers by right up to 40,000 square feet in C-3 and C-4 districts and 80,000 square feet in I-2 through I-4; larger buildings need a special exception. Buildings must sit 200 feet from residential lot lines and one mile from Metro.
Fairfax County Data Center Zoning and Siting Rules
Heavy RestrictionsFairfax County, VA, Zoning Ordinance subsec. 4102.6.A (Data Center)
Any data center building must be located at least 200 feet from the lot line of an R district or a property developed with a residential use. ... If located on the ground, any equipment for cooling, ventilating, or otherwise operating the facility, including any power generator or other power supply equipment, must be ... located at least 300 feet from the lot line of an R district or a propert...
Data Center Noise Limits
Fairfax County caps continuous data center noise at the property line: 55 dBA at night (10 p.m.-7 a.m.) and 60 dBA daytime where it reaches residential property. Every data center must pass pre- and post-construction noise studies proving compliance with Noise Ordinance Chapter 108.1.
Fairfax County Data Center Noise Limits
Heavy RestrictionsFairfax County, VA, Code of Ordinances ch. 108.1, Sec. 108.1-4-2
no person shall permit, operate, or cause any source of sound or sound generation to create a sound which exceeds the limits set forth in the following table titled "Maximum Sound Levels" when measured at the property boundary of the sound source or at any point within any other property affected by the sound. ... Residential Areas ... 7 a.m. to 10 p.m. 60 ... 10 p.m. to 7 a.m. 55.
All Fairfax County ordinances
See every category we cover for Fairfax County: parking, noise, fences, fires, animals, pools, and more.
Fairfax County Ordinance Hub →