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Why impacts vary from one project to another
A data center’s effects depend on its scale, power demand, cooling system, site, and distance from homes and other sensitive uses. A smaller enterprise facility is not equivalent to a large campus built in phases. A large project may also need supporting power lines, water service, roads, and telecommunications infrastructure, so its footprint can extend beyond the buildings themselves.
For a specific proposal, separate temporary construction effects from recurring operating effects. The project’s power capacity, planned buildout, cooling design, water source, nearby land uses, and approval status are more useful than a general label such as “data center.” Local zoning and utility rules also shape what can be built and who pays for required upgrades. Los Angeles County’s planning overview describes land-use and infrastructure considerations; the applicable rules vary by locality.
Do data centers lower nearby home values?
The evidence is mixed, and no study result should be treated as a guaranteed change in an individual home’s value. A September 2026 working paper by Garrison Schlauch and Simon Greenhill estimates declines near announcements of large U.S. data centers. Other studies summarized by Fairfax County do not find an automatic or marginal negative effect. Differences in facility scale, distance, research methods, timing, and local housing markets may help explain the different findings.
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| Evidence | Finding | How to interpret it |
|---|---|---|
| Schlauch and Greenhill, September 2026 working paper | The authors estimate an average 2.98% decline in home values within three miles over the five years following announcement, commonly rounded to 3%, and a 7.2% average decline within one mile. They report smaller estimates beyond one mile and no clear effect on sales volume. | The analysis covers large U.S. data centers, defined as a single facility or related group with at least 20 MW of power capacity or 100,000 square feet of building area. It uses a matched, stacked event-study design. The authors describe it as a working paper circulated for discussion and comment; it has not been peer reviewed. The figures are estimates, not predictions for a particular property. Read the working paper. |
| Studies summarized by Fairfax County | The county cites a 2023 George Mason University study finding no marginal negative effect after accounting for industrial properties, and a 2026 National Association of Realtors study finding no statistical evidence that data centers automatically lower nearby values. | Fairfax County says it has not itself analyzed home values near data centers. These findings do not establish that every project has no effect; they differ in study design and scope from the 2026 working paper. See Fairfax County’s FAQ and source summaries. |
The 2026 working paper also calculates a $20.6 billion nationwide housing-wealth loss as an aggregate implication of its estimated effects and sample. That is the authors’ estimate, not a government accounting or a figure that can be applied to a particular neighborhood. For a home near a proposed facility, the relevant questions include its distance from the site, the size and type of facility, the local market, and what is known about the project’s design and operating conditions.
Noise, traffic, and construction disruption
Cooling equipment and generators are common potential noise sources. Michigan’s official data-center guidance says, “Noise, typically stemming from cooling equipment and generators, is one of the primary concerns raised by nearby residents.” The actual effect depends on equipment, siting, sound barriers, operating conditions, and the distance to homes. Michigan’s guidance also notes that facility water use varies and that local review involves multiple factors.
Construction can bring heavy vehicles, road wear, and temporary obstruction. Virginia’s Joint Legislative Audit and Review Commission documented residents’ reports of persistent noise and construction-related road effects, including heavy vehicles reportedly damaging an access road and sometimes blocking school buses and emergency vehicles. Those accounts show that these impacts can occur; they do not mean every project will cause them. Read JLARC’s 2024 chapter on local residential impacts.
When reviewing a proposal, look for baseline noise measurements, operating limits, setbacks, barriers, construction traffic routes, road repair obligations, and a plan for keeping emergency access clear. Conditions are most useful to residents when they are specific, enforceable, and paired with monitoring or a way to report violations.
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Electricity demand and who pays for grid upgrades
A data center’s electricity consumption and the cost of expanding the grid to serve it are related but distinct issues. Fairfax County says residents do not directly pay for data centers’ electricity consumption, but may bear a portion of the cost of energy-infrastructure improvements. It points to rate design and Virginia measures assigning certain costs to high-energy users. The allocation depends on the utility, regulation, rate structure, and project agreements; Fairfax’s explanation should not be assumed to apply everywhere. Fairfax County explains its local context.
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Australia’s Department of the Prime Minister and Cabinet made a related point in a September 2026 consultation paper: “While major data centre projects can support economic growth and digital capability, they can also create additional costs for the wider community if their increased demand for electricity, water, land, transport and supporting infrastructure is not proactively managed.” The paper proposes that data centers cover transmission, network, and utility-service costs so other users do not pay more because of data-center activity. This is a proposal in an Australian consultation paper, not a universal rule or an enacted requirement everywhere. Read the consultation paper.
For a local project, check which grid upgrades are required, whether costs are assigned to the developer or utility customers, and whether any allocation changes over time. Public statements about who pays are less informative than the applicable tariff, regulatory decision, and project agreement.
Water use depends on the facility and the local supply
There is no single water-use figure that describes all data centers. Cooling systems and facility designs differ, and local water availability matters. Michigan’s guidance says water use varies. Fairfax County reports that data-center water-use information in the county had been private and points to new reporting requirements expected to provide more detail from 2027. Those statements are specific to their jurisdictions and dates; they do not establish a national average. Michigan guidance and Fairfax County’s FAQ explain their respective contexts.
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Local taxes, jobs, and public services
Data centers can contribute substantial tax revenue in places with many facilities, but local fiscal results are not transferable from one county to another. Tax bases, equipment depreciation, incentives, and the number and scale of projects differ. The examples below illustrate two Virginia localities; their figures use different fiscal measures and should not be compared as if they were calculated on the same basis.
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| Locality and period | Reported data-center revenue | Other reported local contribution |
|---|---|---|
| Loudoun County, Virginia; FY 2026 | $1.2 billion in real and personal property-tax revenue, representing 39% of the county’s overall budget. | More than 17,000 direct and indirect data-center-related jobs, including permanent operational jobs and wider employment in specialized trades, technology, professional services, and security. Loudoun County’s figures. |
| Fairfax County, Virginia; tax year 2026 revenue and FY 2027 budget context | $110.6 million in data-center revenue, about 1.9% of FY 2027 General Fund revenue. The county says most of this revenue is business personal property tax on equipment, which is subject to depreciation. | The county’s cited figure is a revenue measure, not a job count. Fairfax County’s figures. |
Local revenue can support public budgets, but the eventual effect on services depends on how local governments budget and use the money. Some localities may also negotiate community benefits for priorities such as fire services, parks, infrastructure, or farmland preservation. A general promise is not the same as a written, enforceable commitment with a responsible party, timeline, and oversight.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Land use, approvals, and community commitments
Large campuses can occupy substantial land, change views, and compete with housing or agricultural production. Utility and telecommunications infrastructure may require additional sites or corridors. Australia’s September 2026 consultation paper identifies land competition and supporting infrastructure as issues for major projects, while local governments handle siting and public input under their own rules.
Approval processes differ. Loudoun County requires special-exception approval for future data-center proposals. In its 2026 update, Los Angeles County reported that its zoning code did not yet contain rules specific to data centers. These examples show why residents should check the current local code and approval process rather than assume one county’s rules apply elsewhere. Loudoun County’s data-center information; Los Angeles County’s planning page.
In Massachusetts, Executive Order No. 658 (2026) describes specified permitting prerequisites for projects exceeding a peak electricity-demand threshold of 25 MW. This is a Massachusetts rule, not a nationwide standard. Read the executive order.
What residents should check in a proposal
Before a project is approved, or while public comment is open, seek the documents that make projected impacts and obligations concrete. The details below help compare proposals without reducing different local conditions to a single score.
- Scale and buildout: proposed power capacity, building area, phases, and whether later expansion requires another approval.
- Nearby uses: distance to homes, schools, hospitals, and other sensitive sites; zoning context; and the location of utility corridors.
- Noise and construction: baseline measurements, equipment sources, setbacks, barriers, operating limits, haul routes, road repairs, and emergency-access arrangements.
- Water: cooling design, water source, expected demand, local availability, permits, and reporting obligations.
- Infrastructure costs: required electricity, water, road, and telecommunications upgrades, the party responsible for each cost, and the applicable utility or regulatory documents.
- Public return: projected and actual tax receipts, incentives, job estimates, whether jobs are direct or indirect, and the time period behind each figure.
- Enforceable benefits: written commitments with defined amounts or actions, deadlines, monitoring, and remedies if obligations are not met.
- Decision process: the permitting authority, public-hearing opportunities, applicable zoning, reporting requirements, and how compliance will be overseen.
Where available, the most useful records are the actual tax agreement, utility cost allocation, water permits, noise conditions, construction plan, and community-benefit agreement. A project’s approval stage matters: an announced proposal, an application under review, and an operating facility do not provide the same certainty about final design or conditions.
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