Commissioning now decides when lease revenue starts

Data center commissioning now sits between a finished building and contracted lease revenue, and its evidence is scattered across contractors, spreadsheets and inboxes. Leading developers are managing every test, issue and acceptance step as one live record that the tenant can see.

Data centersSegeta Insights
Data centers
The number$$287K

a day of deferred lease revenue on a late 36 MW hall

What is at stake

Each month of commissioning delay on a 36 MW data hall can defer about $$8.6 million before tenant remedies.

Where days are lost
  1. Factory and installation evidence
  2. Issues log to integrated systems testing
  3. Tenant acceptance to lease commencement

Commissioning was long treated as the technical close-out of a data center, a period of testing between construction and operation. In a market where most capacity is sold before it is built, it has become the step that converts a finished building into contracted revenue. In the first half of 2026, 80.4 percent of the data center capacity under construction in North American primary markets was preleased, so for most developers the date on which the tenant accepts a hall is the date on which rent begins.1

The evidence that a hall works is assembled from many hands. Factory test reports, startup records, functional test results and issue logs are produced by equipment vendors, by electrical, mechanical and controls contractors and by the commissioning agent, each in its own format and system. When an open issue in one contractor's log is invisible to another, a single integrated test can fail and push acceptance back by weeks. This article sets out where data center commissioning loses days, how a connected operating model closes those gaps and what each day of delay costs a developer.

Demand has turned commissioning into a revenue milestone

North American primary markets held a record 10,903 megawatts (MW) of supply in the first half of 2026, with 7,481 MW under construction and vacancy at 1.4 percent, according to CBRE.1 JLL counts about 35 gigawatts under construction across North America and reports that rents rose 9 percent in 2025 and about 60 percent since 2020.2 When almost every megawatt is contracted before delivery, the date on which the tenant accepts the hall becomes the date on which revenue begins, and late commissioning becomes a finance problem.

The technical scope of commissioning is growing at the same time. Uptime Institute's 2025 cooling systems survey found that direct liquid cooling adoption is rising slowly, with high rack densities as the top driver, which adds coolant distribution units and secondary fluid networks to the test plan.3 Uptime's 2025 outage analysis found that nearly 40 percent of organizations suffered a major outage caused by human error in the previous three years, and 85 percent of those incidents stemmed from procedures that were not followed or were flawed.4 Tenants therefore ask for more evidence before they accept a hall, and each extra system extends the chain of contractors who must supply it.

Data center commissioning loses days at three handoffs

Commissioning moves through five levels, from factory witness testing of equipment at Level 1 to integrated systems testing of the whole facility at Level 5.5 Each level depends on evidence produced by a different party, and the days are lost where one party's sign-off depends on another party's record.

Rents for large data center requirements rose fastest in New York and Atlanta in the first half of 2026.

Exhibit 1Large-requirement rents rose fastest in New York and Atlanta in H1 2026Year-over-year change in asking rates for 10+ MW requirements, percent
New York Tri-State19
Atlanta14.5
Chicago9.7
Northern Virginia1.5
Silicon Valley0
Hillsboro0

Source: CBRE, North America Data Center Trends H1 2026, 2026

01Factory and installation evidence

Levels 1 to 3 cover factory acceptance, delivery inspection and initial startup of switchgear, uninterruptible power supplies (UPS), generators, chillers and cooling units.5 Test reports arrive as PDFs from manufacturers, tags sit in contractor checklists, and the commissioning agent assembles them by email. A missing factory report often surfaces only when Level 4 testing is about to start.

02Issues log to integrated systems testing

Level 4 functional tests generate issues that electrical, mechanical and controls contractors each track in their own spreadsheets. Level 5 integrated testing requires every prerequisite to be closed, and it consumes scarce load banks, specialist technicians and tenant witnesses, so a single open item can cost weeks of rescheduling.5 Where the owner seeks Uptime Tier Certification of Constructed Facility, live demonstrations under real conditions add a further gate to the same calendar.6

03Tenant acceptance to lease commencement

The hyperscale tenant's acceptance team reviews test results, as-built records and open issues before it signs the certificate that starts the lease. The developer's leasing and finance leaders usually see the commencement date move only after the delivery team reports it, which can leave revenue forecasts weeks out of date.

A connected operating model treats each test as an obligation

Leading developers are beginning to manage the months between mechanical completion and lease commencement as a network of obligations, each with an owner, a deadline and a cost for every day it stays open. A live layer reads the systems already in use, including the commissioning platform, contractor spreadsheets, Primavera P6, the building management system, email and site messaging, and runs a four-step loop:

  1. Detect

    risk where it first appears, such as a firmware mismatch logged in one contractor's issues spreadsheet.

  2. Explain

    which tests, sign-offs and lease terms it affects, from the Level 4 generator sign-off to the tenant's commencement date.

  3. Recommend

    recovery options with owners and expected impact, such as a vendor site visit before the integrated test or a partial test sequence that protects the booked witnesses.

  4. Execute and track

    each agreed action to closure, measuring the exposure retired in days and dollars of deferred rent.

The same record can give the hyperscale tenant a live view of test status, open issues and evidence, with plain-language answers drawn from the project record. Contractors and equipment vendors can use one channel to submit reports and close issues. Artificial intelligence does the reading, linking and drafting, while the commissioning agent, the delivery head and the tenant's acceptance team remain accountable for every judgment and sign-off.

A late 36 MW data hall costs about $$287,000 a day

The cost of delay in data center commissioning is the daily lease revenue deferred and the financing carried when tenant acceptance and lease commencement slip, before any delivery credits or contractual remedies owed to the tenant.

Each month of commissioning delay on a 36 MW data hall can defer about $$8.6 million before tenant remedies.

Exhibit 2. Estimated daily cost of delay for a composite 36 MW leased data hall

ComponentBasisEstimate per day
Lease revenue deferred36,000 kW of critical IT capacity at $$160 per kW per month, the low end of CBRE's H1 2026 asking range for 10+ MW requirements in Northern Virginia 78About $$189,000
Construction financing carryDevelopment cost of about $$634 million at $$17.6 million per MW 9; assumes 80 percent drawn at a 7 percent all-in rateAbout $$97,000
Total before tenant remediesSum of the two componentsAbout $$287,000

Source: Segeta estimate based on CBRE and Cushman & Wakefield data; financing assumptions are illustrative.

On these assumptions, a 30-day slip defers about $$8.6 million and a 60-day slip about $$17.2 million, before any rent credits or termination rights in the lease. Phased commencement of partial capacity and capped contractor delay damages may offset part of that exposure, yet they rarely cover delays caused by missing evidence from another contractor.

What delivery and leasing leaders can do now

  1. 01Map the obligations behind lease commencement

    List every test, sign-off and document the tenant requires for acceptance, and name an owner for each at the developer and at every contractor.

  2. 02Price the commencement date in daily rent

    Attach a daily cost of delay to the acceptance milestone, so that an open issue is discussed in dollars on the day it is logged.

  3. 03Merge contractor issues logs into one record

    Hold electrical, mechanical and controls issues in a single live register linked to the Level 4 and Level 5 prerequisites they block.

  4. 04Give the tenant a live acceptance view

    Share test status, open issues and evidence with the hyperscaler's acceptance team continuously, which can shorten the final review.

  5. 05Measure the time from signal to action

    Report monthly how many days pass between the first record of a commissioning issue and the assignment of a recovery action.

Developers cannot shorten utility queues or equipment lead times on their own, yet they can control how quickly a logged issue becomes a decision. Those that manage commissioning as a live, priced set of obligations shared with the tenant are likely to bring revenue forward by weeks and earn the confidence that wins the next lease.

Questions leaders ask

What are the five levels of data center commissioning?

Level 1 covers factory witness testing of equipment, Level 2 inspection on delivery, Level 3 installation checks and initial startup, Level 4 functional performance testing of each system, and Level 5 integrated systems testing of the whole facility. Each level depends on evidence from a different contractor, so missing records at one level can delay the next.

What is integrated systems testing in a data center?

Integrated systems testing is the Level 5 stage of commissioning, in which power, cooling, controls and monitoring are tested together under load. A typical test simulates a utility blackout to confirm that the UPS carries the load and the generators start and share it as designed, usually with the tenant's witnesses present.

How does commissioning affect data center lease commencement?

Most hyperscale and colocation leases start when the tenant accepts the capacity, and acceptance usually requires completed commissioning, closed issues and as-built evidence. A failed or rescheduled integrated systems test therefore moves the commencement date, which defers contracted rent and extends the financing the developer carries.

How much does a data center commissioning delay cost per day?

For a composite 36 MW data hall leased at $$160 per kW per month, deferred rent alone is about $$189,000 a day. Adding financing carry on a development cost of about $$17.6 million per MW brings the estimate to roughly $$287,000 a day, before any rent credits owed to the tenant.

Notes and sources
  1. CBRE, "North America Data Center Trends H1 2026," CBRE Research, August 2026, cbre.com.
  2. W.Media, "North America data centers feel the squeeze as vacancy shrinks to 1 percent: JLL," W.Media, February 2026, w.media.
  3. Uptime Institute Intelligence, "DLC adoption remains slow and steady," Data Report 181, July 2025, intelligence.uptimeinstitute.com.
  4. Uptime Institute, "Uptime Announces Annual Outage Analysis Report 2025," press release, May 2025, uptimeinstitute.com.
  5. CxPlanner, "Data centers and the commissioning process," CxPlanner, accessed October 2026, cxplanner.com.
  6. Uptime Institute, "Tier Certification of Constructed Facility," Uptime Institute, accessed October 2026, ats.uptimeinstitute.com.
  7. CBRE, "Northern Virginia data center market," North America Data Center Trends H1 2026, CBRE Research, August 2026, cbre.com.
  8. CBRE, "North America Data Center Trends H2 2025," CBRE Research, 2026, cbre.com.
  9. Finviz (Business Wire), "Cushman & Wakefield releases 2026 Data Center Development Cost Guide citing 21 percent rise in per-MW construction costs," September 2026, finviz.com.