What is the biggest cost in building a data center?

Mechanical and cooling systems represent the largest single cost category at approximately 28% of total build cost ($2.8M out of a $10M build). This includes chillers, CRAH/CRAC units, piping, cooling towers, containment systems, and building management system integration. For AI/HPC facilities with liquid cooling, this can rise to 35%+.

How much more does a Tier IV data center cost compared to Tier II?

A Tier IV data center typically costs 2.0-2.5x more than a Tier II facility due to full 2N redundancy across all systems. A Tier II facility at $10M would cost approximately $15M at Tier III (1.5x) and $22M at Tier IV (2.2x). The premium buys concurrent maintainability and fault tolerance with 99.995% uptime.

Why do AI data centers cost 3x more per rack than traditional ones?

AI/HPC racks cost 3x more because they require 30-100+ kW per rack versus 5-10 kW for traditional IT. This demands liquid cooling infrastructure ($500K+ per row), higher-capacity electrical distribution, reinforced floor loading, and specialized fire suppression. The power density alone requires 5-10x more electrical and cooling infrastructure per rack.

Interactive Infographic

Data Center Cost Anatomy

Where does your $10 million go when building a data center? Click each segment to explore the true cost breakdown of mission-critical infrastructure.

$10M

Total Build Cost (Baseline Tier III)

Cost Breakdown

Hover or click each segment to see detailed cost analysis

$10M Total Build Cost

Mechanical / Cooling — $2.8M

28% of Total Build

The single largest cost category. Includes chillers, cooling towers, CRAH/CRAC units, piping systems, hot/cold aisle containment, and BMS integration. For AI/HPC facilities requiring liquid cooling, this can rise to 35%+ of total cost.

Tier Cost Multipliers

How redundancy requirements scale the cost of a $10M baseline build

Tier II

1.0x

$10M

N+1 redundancy
Single distribution path
99.741% uptime (22h downtime/yr)
Planned maintenance requires shutdown

Tier III

1.5x

$15M

N+1 redundancy
Dual distribution paths
99.982% uptime (1.6h downtime/yr)
Concurrently maintainable

Tier IV

2.2x

$22M

2(N+1) full redundancy
Dual active distribution
99.995% uptime (26min downtime/yr)
Fault tolerant — survives any single failure

Key Cost Facts

Numbers that define data center economics

Cooling = Largest Single Cost

At 28% of total CAPEX, mechanical/cooling is the largest single line item. It exceeds even electrical infrastructure (22%) and determines long-term OPEX efficiency.

AI Racks Cost 3x Traditional

A traditional 5-10 kW rack costs ~$15K to deploy. An AI/HPC rack at 40-132+ kW costs $45K-$80K due to liquid cooling, high-density power, and reinforced infrastructure.

5% Contingency Is Not Enough

Industry best practice recommends 10-15% contingency for greenfield builds. Supply chain delays, permitting issues, and scope changes routinely consume the 5% baseline.

References

[1]

CBRE. Source.

Global Data Centre Construction Cost Benchmarks.

[2]

JLL. Source.

Global Data Center Outlook — capex per MW by tier.

[3]

Uptime Institute. Source.

Tier IV 2(N+1) cost composition.

[4]

NVIDIA. Source.

GB200 NVL72 — 40-132 kW/rack reference architecture.

[5]

Open Compute Project. Source.

OCP Open Rack v3 power distribution and cabling cost reference.

[6]

Schneider Electric. Source.

EcoStruxure DC reference designs — power, cooling, BMS cost shares.

For educational and research purposes only. Terms · Glossary

Data Center Cost Anatomy

Cost Breakdown

Tier Cost Multipliers

Key Cost Facts

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References