Methodology
Company project pages first, one link per number, MW always with its basis, a date on every row.
Where the data comes from
We read each company’s own project pages, case studies, news releases and capability pages. The 58 records rest on 85 source pages, most of them the companies’ own project pages, newsrooms and brochures. Where a company’s own page does not carry a figure, the source is a partner’s release (Lendlease for Kajima, DIVCO for EllisDon, ENGIE for STRABAG) or trade press such as Construction Dive, IntelligentCIO and iTnews. Every record lists its sources with the date we accessed them, and each field links to the page it came from. Last full pass: 11 Nov 2026.
Projects are not portfolios
A builder’s project page describes one job. So the table keeps four things apart: the reference project and its MW, the portfolio MW the company reports for itself, the basis of each, and the date. A planned figure stays planned. An announcement does not become a completion. Where a source gives a project value or area, we copy it with its qualifier, and we never present it as the contractor’s revenue or a company-wide total.
Fields we set ourselves
Six fields are a reading of what the company wrote, set only where the quote supports it, and empty otherwise:
- Design-build, turnkey or EPC (18 companies): the scope text says design-build, turnkey, EPC, or design through commissioning.
- Construction management (6): the page names construction management as the role.
- Hyperscale work (19): a source says hyperscale, or names Meta, Microsoft or Oracle as a client. Confidential clients are never inferred.
- Regions: regions the company names, plus the location of its listed reference projects. Headquarters is shown on each company page and does not count.
- Reference project MW (28): the headline MW of the named project. Where a page gives two figures (for example deployed and ultimate) the cell stays empty and both appear on the company page.
- Portfolio MW and basis (12): the company’s own cumulative, annual or pipeline figure. Related groups are separate rows and their totals overlap: Equans Data Centers is a Bouygues group company.
What is left out
Companies we could not source to at least three fields beyond name and summary stay out, as do firms that are not construction contractors (architects, operators, consultancies) and companies that are no longer trading as bidders. A figure we could not re-read on the company’s page is dropped, not carried over.
Corrections
Companies and readers can send corrections to hello@datacenterconstructioncompanies.com with a public source. We update the row and its verified date. Featured placement is paid and labelled; it never changes a row’s data or its position in the sorted table.
Reuse
The dataset is free to reuse under CC BY 4.0 with a link to datacenterconstructioncompanies.com. Download it as CSV or JSON.
Field definitions
43 fields- Regions
- Where the sources show the company building: regions named in its own pages plus the locations of its listed reference projects. Not a promise of service everywhere.
- Design-build, turnkey or EPC
- True where the company's own scope text says design-build, turnkey, EPC or design-through-commissioning delivery. Empty where the source describes a different role.
- Construction management
- True where the company's own page names construction management as its role on the reference project or offering.
- Hyperscale work
- True where a source says hyperscale or names Meta, Microsoft or Oracle as a client. Confidential clients stay confidential and are never inferred.
- Reference project MW
- Headline megawatts of the named reference project, as its source states them. Planned, contracted and delivered figures are mixed; the Reference project capacity field on each company page carries the basis. Never a company total.
- Portfolio capacity MW
- Cumulative, annual or pipeline megawatts the company reports for itself. Read it with its basis; the figures are not like for like.
- Portfolio basis
- What the portfolio megawatts measure: delivered to date, delivered or under way, delivered per year, pipeline, or developed as an owner-operator.
- Disclosed clients
- Clients, operators or tenants the source names, as short names. Their roles are under Client context. Never an inferred identity.
- Client context
- The source's own wording on the named parties and their roles, for example tenant, owner or end-user, and any limit on the engagement.
- Contracting role and services
- The role or scope the company states: whole facility, shell and core, construction management, MEP, EPC.
- Reference project
- A named or confidential project from the company's own page. One project, not the whole portfolio.
- Reference project capacity and basis
- Source-reported project capacity with its qualifiers: electrical or IT basis, planned or delivered, the contractor's scope.
- Reference project location
- Where the project sits, as published. Not the headquarters.
- Reference project status
- Milestone and date at the source. A historical announcement does not prove completion.
- Completion or scheduled delivery
- Actual completion where stated, otherwise a labelled target.
- Construction duration
- Published build duration for the reference project or phase.
- Reference project area sq ft
- Published building or project area. Per-building and partial-campus figures are qualified in Area basis.
- Reference project area (metric) sq m
- Published total floor area in square metres.
- Area basis
- Whether the area is per building, campus or partial works.
- Data hall space
- Published technical area, with units and expansion qualifiers.
- Reference project buildings
- Building count or configuration for the reference project.
- Data halls or suites
- Number of data halls or suites at the reference project.
- Reference project value
- Published project or campus value in its original currency. Not the contractor's revenue.
- Site area
- Reference project land area with units.
- Structure
- Published structure and floor configuration.
- Cooling
- Cooling technology documented for the company or its reference project.
- Redundancy
- Power or cooling redundancy for the reference project.
- Design PUE
- Design power usage effectiveness of the reference project. A design figure, not measured operating PUE.
- Project ratings and standards
- Ratings or design standards the vendor reports for a project. Targets are labelled; none is a company-wide certification.
- Portfolio capacity statement
- The vendor's own capacity claim, word for word in meaning, with its basis.
- Portfolio project count
- Count and scope as reported, keeping any plus sign and client limits.
- Active data center projects
- Active projects in a vendor website counter on the access date.
- Portfolio value
- Value as reported with its basis: contracted, delivered or under way.
- Portfolio area
- Cumulative area with its basis and source vintage.
- Data center specialists
- Vendor-reported data center workforce, from an undated page.
- Data center experience
- Published sector duration with its source date.
- Customer segments
- Buyer groups the source names.
- Geography as stated
- The geographic coverage in the company's own words.
- Specialist technical services
- Documented engineering, equipment or commissioning services.
- Live-site retrofit
- True only where the vendor explicitly offers retrofit or expansion inside live buildings.
- Ownership
- Ownership and related-company context. Related-company portfolio totals can overlap.
- Headquarters
- Head office as the source states it.
- Name and corporate status
- Separation, trade name or rebrand announced as of the access date.