Data center growth can deliver construction work, operating jobs and substantial tax receipts, but it also concentrates demand for electricity, water, land, roads and public services. The balance is local, not automatic. A community should judge a proposal by its full load on the power and water systems, enforceable noise and land-use conditions, tax treatment after incentives, infrastructure costs, and measurable benefits—not by a jobs or investment headline alone.
What changes when a data center is proposed?
A data center is a large industrial building filled with servers, cooling equipment, electrical systems and backup power. Its effects begin before opening: utilities may need substations, transmission lines, generation or storage; governments may widen roads and coordinate emergency services; and the site may replace farmland, trees or other potential uses. Once operating, the building can run continuously, creating a steady electricity load and equipment noise even when relatively few people work inside.
Local impact varies with facility design, the number of buildings, available grid capacity, water conditions, tax policy, zoning and the distance to homes and sensitive uses. A single figure from another county is therefore a scale example, not a forecast for a new proposal.
Construction and operations are different economic events
Virginia’s Joint Legislative Audit and Review Commission (JLARC) reports industry estimates for a representative 250,000-square-foot center of about 50 full-time workers, with roughly half of those positions held by contractors. Construction of one building usually lasts 12 to 18 months and can reach approximately 1,500 workers on site at peak. The peak is temporary; the smaller operating workforce continues after commissioning.
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| Measure | Virginia estimate | How to read it |
|---|---|---|
| Full-time workers at a 250,000-square-foot center | About 50 | Industry estimate reported by JLARC; about half are contractors. |
| Construction period for an individual building | About 12–18 months | Typical duration cited by JLARC, not a guarantee for every project. |
| Peak construction workforce | Approximately 1,500 workers | Temporary on-site peak reported by JLARC. |
| Virginia industry jobs | 74,000 | JLARC estimate for the state industry, not permanent jobs at one facility. |
| Virginia industry labor income | $5.5 billion annually | Statewide estimate; most economic benefits derive from construction. |
| Virginia industry GDP | $9.1 billion annually | Statewide estimate using the report’s economic model. |
Local officials should request the developer’s expected construction trades, payroll, local hiring, apprenticeships and operating occupations separately. A statewide job total cannot be used to promise that a particular neighborhood will receive the same employment.
Do data centers pay taxes to the local community?
They can, but the amount retained locally depends on assessed equipment and buildings, tax rates, exemptions, negotiated incentives and the cost of serving the project. JLARC found that data center revenue represented less than 1% to 31% of total revenue in five mature Virginia data-center localities. The range shows why a project’s tax contribution must be stated as a local budget share after incentives, not as a generic industry figure.
| Local example | Reported tax figure | Period and denominator |
|---|---|---|
| Loudoun County, Virginia | $1.2 billion; 39% of the county’s overall budget | Fiscal year 2026 figure reported by the county. |
| Loudoun County, Virginia | $1.3 billion; 40% | Fiscal year 2027 adopted-budget projection, not collected revenue. |
| Fairfax County, Virginia | Approximately $110.6 million; 1.9% | Data centers’ attributed share of FY2027 General Fund revenue for tax year 2026. |
Loudoun and Fairfax are not interchangeable benchmarks. Market concentration, assessment methods, tax structures and budget denominators differ. A responsible fiscal analysis subtracts public costs—roads, utility work, schools, fire protection, permitting and debt service—and identifies when an exemption or incentive reduces receipts.
How does a data center affect electricity, reliability and bills?
The building’s demand is only part of the question. Serving it may require a new substation, transmission work, generation capacity, storage or network upgrades. Residents should ask for the expected peak megawatts, annual consumption and phase-in schedule, then identify the utility’s cost-allocation rules.
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Who pays matters more than a promise that the project will “bring investment.” If project-driven upgrades are assigned to existing customers, household and small-business bills can rise or customers can bear stranded costs if a planned phase is delayed or canceled. Canada’s federal Responsible Data Centre Development Principles state that data centers “must not shift project-driven electricity system costs onto households and existing businesses.” Those principles are a policy position for Canada, not a binding rule everywhere.
Questions about reliability
- What is the peak and annual load for each construction phase, and on what date will each phase connect?
- Which substations, lines, generation resources or storage assets are required?
- What portion is paid by the developer, the utility or the wider rate base?
- What happens to unused infrastructure if a later phase does not open?
- How will backup generators be tested, fueled and controlled during outages?
A UK Department for Energy Security and Net Zero commission to Europe Economics compared full-chain electricity use for three specific digital services—video streaming versus Blu-ray, eBook reading versus print books, and AI translation versus human translation—under low, medium and high assumptions. The digital option matched or substantially undercut the physical alternative in those cases. A July 2026 follow-up added ten cases and reported that AI productivity uses typically reduced electricity per task, while non-AI digitization could either increase or reduce consumption. These are service-delivery comparisons, not measurements of a proposed facility’s local load or proof of a universal net-energy benefit.
What about water use and freshwater supplies?
Cooling design determines whether a center uses substantial freshwater, recycled water, air cooling or a combination. Local conditions determine whether the same withdrawal is manageable. Public review should require the source, average and peak withdrawals, discharge volumes, treatment arrangements and a method for reporting actual use after opening.
Canada’s principles say data centers should minimize freshwater consumption and protect local supplies while accounting for resource constraints and overall environmental performance. That statement does not establish a common water standard in other jurisdictions. Where supplies are constrained, a permit should specify conservation triggers, drought operations and public reporting rather than rely on an annual estimate.
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Noise, land use and quality of life
Cooling fans, chillers, transformers and backup generators can create continuous sound. Virginia JLARC reports that some residents experience well-being effects from constant low-frequency noise. Sound studies should model low-frequency components, generator testing, nighttime conditions and cumulative effects from neighboring facilities. A permit or development agreement is stronger when it sets a maximum sound level, defines where it is measured, requires monitoring and provides a remedy for violations.
Land-use review also covers setbacks, tree cover, visual screening, traffic, stormwater, wetlands, air emissions and emergency access. A site that is technically buildable may still be a poor fit beside homes, schools or a constrained watershed. Alternatives such as reusing an industrial site, increasing buffers or moving equipment away from residences should be evaluated before approval.
Who makes the decisions?
Michigan
Michigan’s public guidance describes state oversight of electric service, water withdrawals, air emissions, wastewater, wetlands and construction. Local governments retain land-use and community-impact authority and may negotiate property-tax or community-benefit agreements. Examples of negotiated funding include farmland preservation, fire departments, parks and infrastructure. These descriptions are Michigan-specific; another state may allocate authority differently.
Virginia
Loudoun County reports approximately 233 data-center buildings and 56.5 million square feet built or under construction, with more than 10 million square feet permitted in 2025. In 2025 the county eliminated by-right development for future data centers, requiring special-exception approval, a public hearing and a Board decision. Fairfax County says some data centers can still be built by right in its heaviest industrial districts when standards are met, while certain zoning changes require public hearings. The contrast makes the current zoning map and approval path essential to any local discussion.
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JLARC recommended clarifying utility authority to delay service when load cannot be supported, addressing stranded infrastructure-cost risk, and authorizing local governments to require water-use estimates and sound studies and to set maximum sound levels. Recommendations should not be mistaken for powers every Virginia locality already has.
Canada
Canada’s federal principles call for early engagement with host communities and Indigenous rights holders, payment by proponents for directly attributable electricity-system costs, minimized freshwater use, independently verifiable local-impact information and measurable reporting of material commitments. They are a framework for Canadian policy, not a substitute for local permits elsewhere.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to compare competing sites or project designs
When a council or planning board has more than one option, use the same questions for each proposal. A side-by-side record prevents a low tax number from hiding a high infrastructure burden.
| Issue | Evidence to compare |
|---|---|
| Electricity | Peak and annual demand, connection date, reliability plan, required upgrades and payment responsibility. |
| Water | Source, cooling technology, average and peak withdrawals, discharges and reporting commitments. |
| Noise | Distance from homes and sensitive uses, low-frequency modeling, generator noise, cumulative effects, enforceable limits and remedies. |
| Land and infrastructure | Disturbed acreage, tree and wetland loss, buffers, site reuse, roads, stormwater and emergency-service demands. |
| Jobs | Construction and permanent headcount, contractors, wages, local hires, training and apprenticeship targets. |
| Taxes | Assessment, rates, exemptions, incentives, timing of receipts and public costs over the same period. |
| Community benefits | Specific projects, legal responsibility, funding schedule, public reporting, successor obligations and remedies. |
Questions to take to a public meeting
- What are the expected peak and annual electricity loads, and when will each phase come online?
- Which grid upgrades, substations, generation or storage assets are needed, and who pays for each?
- What water source and cooling design will be used, and what are average and peak withdrawals and discharges?
- How will actual water use be reported, including during drought or supply restrictions?
- Does sound modeling include low-frequency sound, backup generators and cumulative effects from nearby centers?
- What sound limits, monitoring duties and enforcement remedies will be legally binding?
- What land-use alternatives, setbacks, tree cover, traffic controls, air-emissions measures and emergency plans are proposed?
- How many construction and ongoing jobs are expected, how many are contractors, and what local hiring, wages and training are measurable?
- What taxes and incentives apply over time, and what infrastructure or service costs accompany them?
- Which community benefits did residents prioritize, who is legally responsible, and what reporting and remedies apply if commitments are missed?
What the available evidence cannot answer by itself
Official examples do not provide one national estimate of net community impact. They also do not establish a universal nearby-property-value effect, health outcome or fiscal return. Those questions require the project’s load studies, water plans, site plans, tax agreements, utility filings, permits and enforceable conditions. Gross statewide jobs or tax receipts cannot be compared directly with a single facility’s permanent workforce.
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Data center growth is neither an automatic economic win nor an inevitable community loss. Construction can be a major, short-lived employment event; operations may employ far fewer people while consuming power and producing continuous equipment noise. Tax revenue can be transformative in one locality and modest in another. The defensible decision is the one that makes electricity and water costs visible, protects neighbors through measurable siting and sound conditions, accounts for public infrastructure, and ties every promised benefit to a responsible party, a deadline and a remedy.
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