Private Cage Colocation: Lead Times, Build Schedule and Cost

What private cage colocation is

Private cage colocation, also called cage colocation, puts your racks inside a colocation cage: a locked, fenced enclosure inside a shared data center hall. Your racks sit inside it on power committed to you. The building, cooling and security staff are shared with other tenants, and the cage is what separates your equipment from theirs.

A cage limits who can reach your equipment. It does not make you the only one with a key. Ask who on your team can enter, when provider staff can enter, and what happens in an emergency. Get the answers in writing.

Cage sizes vary widely. CoreSite, for example, builds cages from 100 to 5,000 square feet. This guide focuses on private cage colocation for 4 to 20 racks. Below that, cabinets in shared space are usually cheaper. From about 250 kW, a private suite starts to make sense. The comparison below sets the options side by side.

Onboarding timeline for a private cage with dedicated power and cooling

Short answer: expect about 60 days for a standard private cage in a running hall, 60 to 120 days if the cage is custom-sized or needs extra power, and 90 to 180+ days when it needs high-density or liquid cooling. Power and cooling are what stretch the schedule, not the mesh.

Plan on 60 to 120 days from signed order to a cage you can move into. A standard cage in a hall that is already running sits at the short end. A custom-sized cage, extra power or high density pushes it toward the long end or past it. Plan the dates around the slowest item: the cage build and its power distribution.

One provider puts a number on the standard case. Equinix says it intends to provision a standard private cage within 60 calendar days of the order booking date. That standard cage is one door, one camera, a demarcation point, biometric security, standard mesh and power allocation. Anything beyond that is fit-out, and fit-out is where custom cages add time.

Timelines are planning targets, not provider commitments. The executed order and design approval should state the delivery obligations.

The onboarding sequence, step by step

The total is a chain. Each step waits on the one before it, so a slow answer early moves every date after it.

Cross-connects are the quickest step but rarely the last one. Lumen states standard intervals of 5 to 8 business days, and some providers quote less. The carrier circuit that rides on the cross-connect usually takes longer, so order it at contract signature rather than at move-in.

When billing starts, and why late design costs money

Billing can start before you can use the cage. Under the Equinix terms above, space and power in a standard cage bill from day 60 even if the cage was provisioned earlier. If your design details arrive late, the provider still builds the standard shell. It is then "provisioned" but not move-in ready, and it bills anyway. Equinix does not bill for space and power while the delay is its own. Ask every provider three things in writing. What starts the billing clock? What happens if the delay is yours? What happens if the delay is theirs?

Lead time to migrate from colocation racks into a private cage

Moving existing racks into a cage takes longer than the cage build, because the old space keeps running until the move is done. Budget the cage lead time, then 2 to 6 weeks of overlap to move and test, then any notice period on the old contract.

Added up, a migration usually runs about 2.5 to 5.5 months from signed order to cutover: 60 to 120 days for the cage, then the overlap. The notice period on the old contract comes on top, so check it before you sign the new one.

• Same building: the shortest path. Equipment can move in stages, and you can ask whether existing cross-connects can be re-terminated in the cage rather than reordered.
• New building: new cross-connects and carrier circuits are needed. Order them at contract signature, since they gate the cutover.
• Overlap cost: you pay for both footprints during the move. Ask whether the new provider will defer billing for the overlap, and check the notice period on the old cabinets before you sign.
• Power check: confirm the cage circuits match the plugs and draw of the equipment you are moving. A mismatch here is found on move day.

Private cage pricing by rack count

The figures below are monthly U.S. planning ranges for space and committed power. They do not include every cross-connect, carrier service, remote-hands charge or one-time cage build cost.

These broad estimates synthesize 2026 cabinet and cage planning benchmarks across major U.S. markets. Density, location, redundancy, term and cooling can move actual pricing substantially. Obtain normalized written quotes.

Minimum commitments and dedicated power

A provider may price a cage from the number of cabinets, square footage, committed kW or a combination. Ask whether power is dedicated to the cage, how usable IT kW is calculated and whether unused capacity can be ramped. Confirm minimum monthly revenue, contract length and any required cabinet or circuit configuration.

Security scope

Expansion rights protect the deployment

“Room to grow” is not a contractual right. Identify the adjacent space and power, the date through which it is held, the price or pricing method and what happens if you do not exercise the option. For phased deployments, document the ramp and the provider's remedies if a future block is late.

Cross-connects and network cost

Request the carrier list, meet-me-room path, diverse entrance options and both NRC and MRC for every expected cross-connect. Add carrier ports, cloud on-ramps, IP transit, dark fiber, LOA handling and internal cabling. Network cost can erase an apparent difference in cage rent.

How to compare providers

• Normalize usable IT kW, not only circuit size or allocated power
• Test cooling at the actual rack-by-rack density
• Compare cage construction and custom-security scope
• Price the complete carrier and cross-connect design
• Document adjacent expansion rights and ramp dates
• Model all NRCs, MRCs, escalators and renewal terms

Private cage vs cabinets vs private suite

A private cage sits between cabinets in shared space and a private suite. It is the right structure for a specific set of reasons, and an expensive habit when chosen by default.

The honest test is whether you need the enclosure for a reason you can name. Regulatory separation, customer audit requirements, physical access control for a small team, or protecting an unusual power and cooling design are all good reasons. Preferring the look of a cage is not, and at small rack counts the premium over well-chosen cabinets is real.

What we see in real quotes. Quotes we reviewed in October 2026 for private cage deployments ran $215 to $298 per kW per month for space, committed power, cross-connects, remote hands and one-time costs, counted over the term. Providers and buyers are not named. Send us your quote and we will tell you where it sits.

Density and cooling inside a cage

A cage concentrates heat in a defined area, which makes density the technical constraint that most often forces a redesign late in the process.

• Per-rack ceiling: ask the maximum sustained kW per rack the hall supports today with installed cooling, not the building design ceiling.
• Cage-level ceiling: a hall may support 20 kW per rack generally but not across every rack in one contiguous cage. Confirm the aggregate limit for your footprint.
• Containment: whether hot or cold aisle containment is available inside the cage, who builds it, and whether it is included.
• Airflow direction: cage placement relative to the aisle affects achievable density, sometimes substantially.
• Liquid readiness: if any part of the deployment may go above roughly 40 kW per rack, ask about rear-door heat exchangers or direct-to-chip now rather than at renewal.
• Blanking and hygiene: who is responsible for blanking panels and airflow management, since a poorly managed cage loses usable density.

Bring the density with the rack count. A 12-rack cage at 5 kW per rack and a 12-rack cage at 30 kW per rack are different products in different buildings at different prices.

The cage build itself

The enclosure is a construction item with a cost and a lead time, and it is quoted inconsistently between providers. Get these in writing.

Restoration is the clause most often missed. A cage you paid to build can also be a cage you pay to demolish, and that obligation belongs in the total cost of the term rather than surfacing at exit.

Contract terms that matter more than the rate

1. Power basis: allocated, metered or usable IT load, and how overage above the committed circuit is billed.
2. Escalator: fixed at 2 to 3%, or CPI linked with a floor and cap. Model it to term end with compounding.
3. Expansion rights: a right of first refusal on the adjacent position, and the price at which it is struck. A cage you cannot grow is a migration in two years.
4. Renewal: the clause that sets year four. Digital Realty reported renewal rents up 25.4% on a cash basis in Q2 2026, so a renewal at market can be a large step.
5. Cross-connects: monthly charge per connection, per carrier and per cloud on-ramp, plus install fees. At small scale these can rival the space cost.
6. Remote hands: included minutes, hourly rate and the after-hours multiplier.
7. Termination and migration: notice period, early termination cost, and whether overlap during a move is chargeable.