Data Center Cost Per Square Foot in 2026: $445–$746 vs Houses

Every week brings another headline about a "$50 billion data center" or a hyperscaler's "$500 billion AI infrastructure" commitment. Those numbers are too large to mean anything. Here is the same story in units you can actually use.

The building math: $445–$746 per square foot

ConstructConnect tracks data center construction bids across the US and published its 2026 figures in July: a median of $445 per square foot, up 7.4% from full-year 2025, and an average of $746 per square foot, up 45%. The calculation excludes the top and bottom 10% of tracked projects by cost, and drops anything under 2,000 sq ft, so it is not being skewed by a handful of tiny fit-outs.

Set that against what this site already benchmarks for residential and general commercial builds:

The median data center already costs more than a luxury custom home per square foot. The average costs nearly five times an ordinary spec house.

Median data center ÷ NAHB house average = $445 ÷ $162 ≈ 2.7x
Average data center ÷ NAHB house average = $746 ÷ $162 ≈ 4.6x

Why the average is so much higher than the median

A 45% jump in the average against only a 7.4% jump in the median is not a rounding difference — it is a distribution telling you something. When the average sits well above the median, the underlying data is right-skewed: a relatively small number of very expensive projects are pulling the average up while most projects cluster closer to the median.

That is exactly what is happening. Standard enterprise data centers — the kind built for ordinary cloud hosting, storage, and colocation — track close to the $445 median. The AI-training and hyperscale facilities being announced at record pace are dramatically more expensive per square foot, because of what they have to fit inside that footprint: denser power distribution, liquid cooling loops, and structural reinforcement for heavier equipment racks. Those projects are rare relative to total project count, but expensive enough to drag the average far above the typical build.

The real AI premium isn't per square foot — it's per megawatt

Here is the part the per-square-foot number cannot show you. JLL's 2026 Global Data Center Outlook tracks construction cost per megawatt of power capacity, which is the metric the industry actually prices against, because a data center's value comes from how much compute it can run, not how much floor it covers.

JLL's figures, shell-and-core only:

Critically, JLL is explicit that these figures cover only the shell and core — the building itself. Tenants are typically responsible for the tech fit-out, and JLL notes that fit-out for AI infrastructure can add as much as $25 million per megawatt on top of the shell. That fit-out dollar figure is bigger than the shell-and-core cost it sits on top of.

This is why an AI data center can have a comparatively modest square-foot cost — the building itself is not exotic — while the total project cost runs into the billions. The premium is in power delivery, backup generation, and cooling infrastructure dense enough to serve AI accelerator racks, not in the walls and roof a $/sq ft figure measures.

Shell-and-core only: $11.3M/MW
Plus AI compute/cooling fit-out: up to $25M/MW
Total AI-ready capacity cost: up to $36.3M/MW

Putting the two metrics together

If you are trying to make sense of a specific announced project, you need both numbers, because they answer different questions:

• $/sq ft tells you what the building costs — useful for comparing a data center site against any other commercial real estate use of the same land, and for sanity-checking a construction bid.
• $/MW tells you what the facility's actual purpose costs — the power and cooling infrastructure that makes it a data center rather than a warehouse. This is the number that moves when a project is AI-specific.

A warehouse-shaped building with an AI-grade power and cooling buildout can post a modest $/sq ft and a massive $/MW at the same time. Both numbers are true; they are just measuring different things.

The bottom line

Data center construction runs a median $445 and an average $746 per square foot in 2026 — 2.7x to 4.6x a typical house, and both figures climbing faster than residential construction costs. But the AI capex story you are reading about in the news is mostly happening in the megawatt number, not the square-foot number: shell-and-core construction is up a comparatively modest 6% this year, while AI-specific compute and cooling fit-out can cost more than twice what the building itself does.

If you are benchmarking any commercial build against these figures, run your own project through the cost per square foot calculator rather than applying a national average — data center costs vary enormously by region, power availability, and cooling type, exactly the way residential costs do.

Data center cost per square foot, 2026 (median $445, +7.4%; average $746, +45%): ConstructConnect, June/July 2026 Data Center Construction Report, based on year-to-date tracked US projects, excluding the top/bottom 10% by cost and projects under 2,000 sq ft. Cost per megawatt and AI fit-out premium: JLL, 2026 Market Outlook for Global Data Centers (shell-and-core figures; tech fit-out is separate and tenant-funded). Residential construction cost benchmarks: NAHB, 2026. See our methodology for how we source and verify every figure.