A signed contract gives you a date. That date is almost never the day your hardware is running and generating value. Between signature and live workloads, there are four or five distinct stages, and each one can slip independently.
Understanding what operators mean by "ready for service" is the single most useful thing you can do before committing to a timeline.
What the stages actually are
Every colocation deal, meaning space and power for hardware you own, moves through the same rough sequence.
Substantial completion. Construction is done to a standard where the space could, in principle, be occupied. Power and cooling are installed but may not be commissioned. This is often what an operator means when they say a site will be "ready" by a certain quarter.
Commissioning. Each system is tested independently: power feeds, cooling loops, fire suppression, security. A generator runs under load. Pumping equipment, the coolant distribution units that feed liquid-cooled racks, is tested at operating pressure and temperature. This stage takes weeks and can surface problems that push the date.
Integrated systems testing. All the systems run together, with simulated load. This is where you find out whether the cooling can hold target temperatures when the power draw is real. Tier III design standards require this step, and it cannot be compressed safely.
Client access and fit-out. You can bring your hardware in, install it, cable it, and connect it to the network. The operator's work is done; yours begins. If your hardware is not on site, this stage waits for your delivery schedule, not theirs.
Live workloads. Your hardware is installed, network paths are tested end to end, and you are running. This is the only milestone that pays you back.
A contract that says "ready for service in Q3" may mean substantial completion, commissioning, client access, or live service. The phrase is doing a lot of work, and it is worth pinning down which stage it refers to.
What "ready for service" should mean in the contract
A well-written contract defines ready for service as the point at which the space and power meet agreed specifications and the client can bring hardware in. It should specify:
- The power capacity available at handover, in kilowatts per rack and total for the suite
- The cooling method and the inlet temperature the site will maintain
- Network diversity: how many paths in, from how many carriers
- A clear description of what the operator must demonstrate before the date counts as met
- What happens to your obligations if the date slips, including any rent abatement or termination right
If the contract defines ready for service as substantial completion, you may be paying rent on a space you cannot use while commissioning runs. That gap is worth negotiating before you sign.
What to verify before you rely on a date
The operator's schedule is a projection. Before you build your own timeline around it, check the inputs.
- Power interconnection. The utility interconnection agreement is the longest lead-time item on most sites. Ask whether it is signed and what the utility's committed energization date is. A site can be fully built and wait months for the utility.
- Equipment lead times. Transformers and switchgear have long delivery windows. Ask whether the critical electrical equipment is on order and when it is due.
- Permitting. Certificate of occupancy and operational permits are issued by local authorities on their own schedule. Ask whether any permits are outstanding.
- Cooling system commissioning status. For liquid-cooled deployments, ask when the facility water loop was or will be pressure-tested and at what temperature it operates. A GB300 NVL72 rack draws up to 142 kW per rack, and the cooling has to be proven before you commit to a rack count.
- Prior tenant or prior phase experience. A site that has commissioned and handed over space before has a track record. Ask for the commissioning timeline from the most recent phase.
Questions to take into a call with an operator
- Which milestone does your delivery date refer to: substantial completion, commissioning complete, or client access?
- Is the utility interconnection agreement signed, and what is the utility's committed date?
- Is all long-lead electrical equipment on order and confirmed for delivery before your date?
- What permits are still outstanding, and who controls the timeline on each one?
- What is the contractual consequence if the ready-for-service date slips by 30, 60, or 90 days?
- When was this site, or the most recent phase of it, last commissioned, and how close was that to the projected date?
A date that survives those questions is one you can plan around. A date that cannot answer them is a guess.
Sources
The stage descriptions and contract guidance in this article are drawn from general data center industry practice, the Uptime Institute's Tier Standard documentation, and standard commercial colocation contract structures. No proprietary XIRR transaction data was used. For background on what a colocation site provides, see Space and power: what a colocation site provides. For what a colocation contract commits you to beyond the delivery date, see What a colocation contract commits you to.
Share your requirements. We'll canvas the market.
Tell us what you need (for colocation space and power: market, kW or MW, cooling and timing; for reserved GPU capacity: region, GPU type, cluster size and timing) and we'll canvas colocation and neocloud operators in parallel. Shortlist in 48 hours. We don't sell hardware. We broker colocation space and power, and reserved GPU compute capacity.
Earlier conversations get better terms. When you engage early, we have time to negotiate with vendors before you need to commit. We're paid only when a deal closes, and the fee structure is agreed in writing before any introduction.