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Site selection · Reviewed 25 September 2026

How to assess a data-centre site.

A seven-step evidence workflow for comparing sites without turning proximity, a map layer or an early utility conversation into a delivery claim.

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The evidence sequence

Seven checks before a site commitment

  1. Step 1
    Freeze the operating mandate
    Record the initial and ultimate IT load, phasing, ready-for-service dates, resilience objectives, latency needs, cooling approach, staffing model and expansion case. Keep assumptions versioned.
  2. Step 2
    Prove control of the right land
    Map the contracting party, ownership or option, title extent, access, easements, covenants, neighbouring rights and the land needed for substations, generators, water, fibre and future phases.
  3. Step 3
    Verify deliverable infrastructure
    Treat proximity as a lead, not proof. Obtain dated evidence for the power connection route, diverse fibre paths, water and drainage capacity, fuel logistics and the accountable delivery parties.
  4. Step 4
    Screen hazards and site conditions
    Record flood, surface-water, contamination, geotechnical, ecology, noise, air-quality, neighbouring-hazard and emergency-access findings, together with data limits and required specialist work.
  5. Step 5
    Map the consent route
    List planning, zoning, environmental, utility, building, fire and other permits with their authorities, information requirements, dependencies, consultation steps and decision dates.
  6. Step 6
    Compare the delivered programme
    Join land, utility works, studies, consents, enabling works, long-lead packages and operations mobilisation into one cost and schedule model with owners and downside cases.
  7. Step 7
    Set decision and refresh gates
    Define which unknowns block exclusivity, acquisition, design release, equipment orders and notice to proceed. Revalidate evidence when the load, layout, authority response or delivery date changes.

Decision record

Join every site claim to evidence and an owner

Workstream

Site mandate

Evidence to retain

IT and facility load by phase, service date, resilience, latency, cooling, operations and expansion assumptions

Accountable review

Development lead with engineering and operations

Workstream

Land and rights

Evidence to retain

Title or ownership evidence, option terms, boundaries, access, easements, covenants and off-site rights

Accountable review

Property and legal advisers

Workstream

Utilities

Evidence to retain

Project-specific power, fibre, water, drainage and fuel routes with capacity, conditions, cost, programme and owner

Accountable review

Utility leads and discipline engineers

Workstream

Site constraints

Evidence to retain

Survey basis, hazards, flood, contamination, ground, ecology, noise, air quality, security context and emergency access

Accountable review

Environmental and technical advisers

Workstream

Consents

Evidence to retain

Applicable authorities, application route, required studies, consultation, permit dependencies and decision status

Accountable review

Planning and permitting lead

Workstream

Delivery case

Evidence to retain

Enabling works, long-lead packages, total delivered cost, critical path, contingencies and expiry dates

Accountable review

Project controls and commercial lead

UK and US starting points

Use official records for the question they answer

United Kingdom
Read land, flood and consent evidence together
For England and Wales, the title register records ownership and certain rights or legal matters while the title plan shows general extent. In England, flood and environmental guidance identifies site research, specialist assessments and pre-application routes. None is a complete development approval.
United States
Separate screening layers from property diligence
EPA's All Appropriate Inquiries process addresses environmental conditions and potential contamination liability. FEMA hazard tools support location screening, while project-specific engineering, zoning, utility, title and permit evidence must still be obtained from the relevant parties.

Continue the evidence chain

Take the site claim into each infrastructure route

Verify the grid-connection routeVerify fibre paths and demarcationsDefine cooling and water assumptionsBrowse planning and advisory suppliers

Primary references

Sources used for this guide

HM Land Registry — Title register and title plan
Official England and Wales guidance on the ownership, mortgages, rights of way and other legal matters recorded against land; the title plan and register must be read together.
Environment Agency — Flood risk assessments for planning
Current England guidance on when a flood-risk assessment is required, the datasets to research and the limits that must be checked before relying on existing models.
UK Government — Environmental advice for development
Pre-application guidance covering environmental constraints, permits, impact assessment, protected sites, contaminated land, water studies and coordinated applications.
US Environmental Protection Agency — All Appropriate Inquiries
The federal process for evaluating a property's environmental conditions and potential contamination liability, including the current recognised Phase I assessment standards.
FEMA — Hazard Explorer and RAPT
Official location-based tools for screening US natural-hazard, infrastructure and community-resilience layers; they support investigation rather than replace site-specific assessment.
US Department of Energy — Energy-efficient data-centre design
Design guidance connecting IT conditions to the cooling, electrical, heat-recovery and measurement assumptions that shape a site's utility brief.

Sources checked 25 September 2026. Requirements and source coverage vary by jurisdiction, site and project; confirm current applicability with the relevant authorities and qualified advisers.