Loudoun County, Virginia

See every data center.
Report what it's like to live beside one.

Loudoun holds what the county itself calls the largest concentration of data centers in the world. Map them, report what you are living with, and track every new application the county receives — with your name and address never published.

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GIS records
224
GIS built
103
Constructing
36
Pipeline
85
GIS built area
35.7M ft²

Mapped GIS records, not unique tax parcels or buildings; county PINs can repeat. Built floor area is from GIS-built records only — a further 20.9M ft² is under construction and 56.4M ft² proposed. Loudoun County GIS, existing layer edited Sep 3, 2026; pipeline layer edited May 21, 2026.

By the numbers

— GIS built records Classified as built; operation not independently verified
— GIS construction records Approved, being built
— GIS pipeline records Includes approved and in-review plans
— Community reports Submitted by residents

GIS layer-record counts from Loudoun County (—). GIS mapped feature counts can include repeated tax parcel IDs, and pipeline areas are not necessarily unique parcels, projects or buildings. Where every number comes from.

Official county inventory

Data center buildings: built, approved, and proposed

Loudoun County's building estimates as of . These count buildings, not the GIS feature records on our map.

233Built or under construction56.5M ft² combined; not all operating
116Approved / administrative pipeline35.7M ft²; includes plans in review
56Buildings seeking approval20.7M ft² in legislative review
21Legislative applicationsNot approved; may be revised

The 116-building approved/administrative pipeline includes 51 with approved site plans but no building permit, 58 in administrative review, and 7 with legislative approval but no site plan. The county cautions that not all will be built. County overview · County's status table · Source-linked data.

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Your tools

Track your reports Follow what you have filed from received to published — signing in is optional, and reporting stays anonymous. Air Permits & GeneratorsSee the state air-permit record behind Loudoun’s data centers. Search DEQ registrations, backup-generator records and permit documents.Open Get alerts Every new county filing, by RSS or straight onto your calendar — nothing to sign up for. How close are you? See every data center within five miles of an address or district — measured in your browser, sent nowhere. See how it happened Twenty years of the buildout, played back from the county's own records. Check the numbers Every source this site reads, when it was last pulled, and how stale it is allowed to get. Report an issue About three minutes, no account needed — your name and address are never published.

What people report

The nine kinds of issue residents can log

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Meetings & Public Input

Find upcoming data-center hearings, open houses, transmission proceedings and participation deadlines. Filing dates remain in the separate construction calendar.

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