Infrastructure Past, Present, and Future/Loudoun County Data Centers

Introduction Loudoun County Data Virginia is home to over 200 Data centers, the most of any locality in the United States. Data centers began being built in the region in 1993 with the MAE-East internet hub in Vienna. Konheim Orrin Tyson’s Corner at the Epicenter of the Internet http://vivatysons.com/blog/2019/02/15/tysons-corner-at-the-epicenter-of-the-internet/ 2026-09-25 enHowever in 1995 the location moved to Ashburn to better allow for scaling as demand increased. Today, Ashburn is home to 133 Data Centers alone, earning it and Loudoun County the nickname "Data Center Alley."Data Center Alley: How Ashburn became a data center hub of the world Digital Realty https://www.www.digitalrealty.com/resources/blog/northern-virginia-ashburn-data-centers?t=1792158935657?latest 2026-09-25 www.www.digitalrealty.com en Loudoun County has the highest median household income in the United States of $181,765 in 2024.U.S. Census Bureau QuickFacts: Loudoun County, Virginia https://www.census.gov/quickfacts/loudouncountyvirginia 2026-10-15 www.census.gov en History MAE East, standing for Metropolitan Area Ethernet, was the first internet exchange point (IXP) not run by the government. In 1992, the first 4 points were set up in Washington, D.C. and then spread to Vienna, Reston, and then Ashburn. MAE East was created by UUNET and Metropolitan Fiber Systems. This early internet infrastructure made Northern Virginia, specifically Loudoun County, very appealing for further infrastructure development. In the 90s, two of the largest and first internet service providers set their headquarters in Ashburn, Virginia, located within Loudoun County. America Online (AOL) in 1996 and UUNet in 1998. Context in America at the time is important to understanding how Loudoun has become the data center hub it is today. In the 90s, America was going through a technological revolution with the era of the World Wide Web (WWW), which was released to the public in 1993. By 1995, there were about 10,000 web servers online, allowing the public across America to easily use the internet. During this large growth of the internet industry, these two major companies chose to put their headquarters in Ashburn, Virginia. This was not a coincidence, but rather a very deliberate and motivated growth strategy.  Loudoun County, and subsequently Ashburn, has an advantageous location near Washington, D.C., Dulles International Airport, and the IXP in Vienna. The area also had a large number of qualified workers to help build infrastructure exponentially. The early infrastructure built up in the 1990s made it easier and more enticing for other internet companies to set up in the area. In the 2000s, AOL and UUnet were well established; Ashburn and other companies were starting to gravitate to Loudoun County. These companies started bringing more internet infrastructure into Loudoun County. The county has zoning laws that classify and categorize districts and land use for types of buildings/ infrastructure. At the time, there was no classification for data centers, but the Zoning administrator chose to allow them anywhere that office buildings were allowed. The county had a “by-right” building rule that permitted building without any further approval as long as zoning allowed for it. This led to data centers being built in office parks and near homes as part of “mixed-use” communities. In 2008, the housing market crashed around the United States. This largely affected Loudoun County, as the county’s revenue came primarily from residential taxes. Loudoun County needed to diversify the tax base to make up for the loss of the primary source of revenue. With internet companies interested in locating in Loudoun County and land available, government officials saw an economic opportunity to increase commercial tax revenue. The next year, 2007, Loudoun County began expanding data center construction. 2007 to 2016, the county had the largest data center growth in the country. This large boom in infrastructure in Loudoun County caused many of the internet service providers to switch from MAE East IXP to Equinix Ashburn. In 2009, MAE East, one of the major draws for data centers in Loudoun County, officially shut down. yes shape Q495310 Loudoun County Timeline Recent developments In 2024 the County Board of Supervisors launched the Data Center Standards & Locations project to address resident's concerns regarding data centers. The plan consists of two phases.Data Center Standards & Locations Loudoun County, VA - Official Website https://www.loudoun.gov/DataCenterStandards 2026-10-15 www.loudoun.gov Phase 1 - Approved March 18, 2025 This phase focused on proposed map and text amendments to the Loudoun County 2019 Comprehensive Plan. Redesignating Data Centers in industrial zones as conditional or Special Exception (SPEX), ending the By-Right construction that had existed since 2000.2026-07-02 Data Centers in Loudoun: A Primer - The Piedmont Environmental Council https://www.pecva.org/region/loudoun/data-centers-in-loudoun-a-primer/ 2026-10-15 en-US Special Exceptions require both a public hearing and a board vote to be permitted, unlike by-right construction. Phase 2 - Currently Ongoing This phase is focused on creating new use-specific zoning standards for data centers and utility substations that serve them. This would create new requirements for future data centers to be approved. Criticisms of the Data Center Standards & Locations Project As a part of Phase 1 of the plan the Board of Supervisors also passed a grandfathering resolution that allows any Data centers that were previously approved by Feb. 12, 2025 to continue under the previous rules. This allowed 15 data center projects to continue without meeting the SPEX requirements.Flack Eric 11:19 PM EDT October 6, 2026 Loudoun supervisors don't rollback data center grandfathering law, shelve $200,000 audit of grandfathered projects Wusa9 https://www.wusa9.com/article/news/community/data-centers/data-center-rollback-grandfathering-laws-loudoun-county/65-136555f2-d85b-498b-a53a-c7d0582e82e5 3:43 PM EDT October 10, 2026 Additionally the Board shelved an audit of these 15 projects, which was a compromise instead of ending them and forcing them to begin again under the new rules. Fiscal Reality of Data Centers Loudoun County's largest revenue source is property taxes. As the value of property increases the county has consistently lowered the real property tax rate. The increase in property value is in part driven by the data center construction. Additionally, data centers and related companies make up all 10 of the top 10 tax payers in Loudoun.Popular Annual Financial Report https://prcsinfo.loudoun.gov/view/952649939/6/?sharedOn= 2026-10-15 prcsinfo.loudoun.gov Lessons Learned The Loudoun County data center situation offers a lot of lessons learned that could prevent future mistakes between infrastructure growth and policy. The first take away comes from before the boom in data centers. Loudoun County suffered greatly from the 2008 recession causing house values to  plummet. A significantly large portion of the county's tax revenue came for residential housing. The county lost a large portion of their funding leaving a desperate need to find a new source of revenue. This lead to the decision to allow so many data centers into the county. This provides a value lesson for the future about diversifying the county’s tax revenue sources. Relying on one source can easily lead to disaster when that source falls through. This lesson may not have been learned fully as the county now largely relies on tax revenue from these data centers which is a very unstable and unreliable industry. The top 10 tax sources were all data centers. Data centers in Loudoun county were constructed rapidly and expanded exponentially due to the county’s unprepared zoning ordinances. Data centers were put under the category of business centers in the early years because there was no category for them. This allowed data centers all over the county with little restriction. Finally in 2025 the county changed the zoning ordinances so data centers were no long “By-right” and limited zoning areas. Policy is an important part of shaping our society adn it needs to be able to evolve and change to keep up with new infrastructure. When policy moves and changes slowly it fails to adapt to what society needs. This is an important lesson that seems to have been learned, however, only time will tell.