NTT Bengaluru 4 at Prestige Tech Cloud in Devanahalli is 67.2 MW of critical IT load inside 100 MW of facility load, across three buildings of 22.4 MW, each divided into seven data halls of 3.2 MW. Building A went live in June 2026. It is NTT’s largest Indian campus outside Navi Mumbai and the densest thing the company has published in this country. It is also the cheapest megawatt in this registry. Reported investment of ₹2,400 crore against 67.2 MW is ₹35.7 crore per MW — 30% less than the same operator’s Navi Mumbai campus at ₹51.4 crore and less than half its Chennai campus at ₹76 to ₹89 crore. And the site is reported at both 8.5 acres and 18 acres in coverage of the same launch. The registry publishes both.
1At a glance
2₹35.7 crore per megawatt
This registry now has three NTT campuses with both a published capacity and a published cost. Divided, they produce the cleanest capital-cost ladder available on Indian data centres.
| Campus | Cost | Capacity | ₹ crore per MW | Land |
|---|---|---|---|---|
| Bengaluru 4 | ₹2,400 crore | 67.2 MW | 35.7 | 8.5 acres |
| NAV2, Airoli | ₹5,500 crore | 107 MW | 51.4 | 54 acres |
| Chennai 2 | ₹2,652 to ₹3,094 crore | 34.8 MW | 76.2 to 88.9 | 6 acres |
The ordering is not about engineering quality. It is about land, power and scale, in that order.
Devanahalli is an airport corridor outside Bengaluru with land bought in 2023 on a 100 MW commitment, financed alongside a developer partner. Ambattur is an established industrial suburb of Chennai where six acres cost what fifty-four cost in Navi Mumbai. And Airoli is a 54-acre site inside the Mumbai metropolitan region with a 220 kV feed, which is the most expensive land in the country for a data centre.
That is the ladder a developer prices from: ₹36 crore per megawatt in an airport corridor, ₹51 crore in Navi Mumbai, ₹76 to ₹89 crore in an inner-city Chennai suburb.
It is close to the floor for new Indian hyperscale build outside the metros’ cores. Any project quoted materially below it is using a different scope or a different year.
And it explains why the largest Indian pipelines are announced in Devanahalli, Hyderabad and Navi Mumbai’s outer belt rather than inside city limits.
3Seven halls of 3.2 MW
Bengaluru 4 publishes its internal structure, which almost no Indian campus does. That makes it the most legible large campus in this registry.
| Level | Capacity | Count | Total |
|---|---|---|---|
| Campus | 67.2 MW critical IT | 1 | 67.2 MW |
| Building | 22.4 MW critical IT | 3 | 67.2 MW |
| Data hall | 3.2 MW critical IT | 7 per building | 22.4 MW per building |
| Live today | 22.4 MW | 1 building | 33% of the campus |
| Facility load at build-out | 100 MW | 1 | ratio 1.49 |
Three point two megawatts is a clean unit of sale. Seven halls per building means a tenant can take one hall without taking a floor, and an operator can commission a hall at a time rather than a building.
That granularity is why the campus can be 33% live and still be described as open: Building A is complete, and within it a hall at a time can be fitted out against demand. It is also why the 44.8 MW in Buildings B and C is genuinely unknown rather than merely unbuilt — nobody has published a hall count for them.
The registry’s note on the 67.2 MW figure: it is the sum of three published buildings and it closes exactly. That makes Bengaluru 4 the third NTT campus in this file to reconcile perfectly, after Noida 2 and NAV1.
48.5 acres or 18 acres
The land figure for this campus is published twice and the two numbers cannot both be the campus.
| Figure | Source | Implied by it |
|---|---|---|
| 8.5 acres | NTT launch material and derived coverage | 8.8 MW of IT per acre |
| 18 acres | trade coverage of the Prestige partnership | 3.7 MW of IT per acre |
| Noida 2, for comparison | operator | 8.8 MW of IT per acre |
| NAV2, Airoli, for comparison | lender | 6.2 MW of IT per acre |
| Chennai 2, for comparison | operator | 5.8 MW of IT per acre |
Eight and a half acres would make Bengaluru 4 the most land-efficient campus NTT has published in India, at 8.8 MW per acre — identical to Noida 2. Eighteen acres would make it the least, at 3.7.
The likely explanation is scope: the Prestige Tech Cloud development is a larger land parcel and NTT’s campus occupies part of it. The 18-acre figure refers to the site, the 8.5-acre figure to the data centre campus. The registry records both and flags the conflict rather than choosing.
This matters more than it looks. Land efficiency is how a developer decides whether a site can ever reach its announced capacity, and a factor-of-two error in the acreage is the difference between a campus that works and one that has to be re-planned.
5₹2,400 crore or USD 288 million
The cost is also published twice, and the two figures are close enough to be the same thing at a different exchange rate or a different stage of the project.
| Figure | Source | Per MW of IT |
|---|---|---|
| ₹2,400 crore | Indian business press at the launch | ₹35.7 crore |
| USD 288 million | trade coverage of the Prestige partnership | about ₹2,546 crore, or ₹37.9 crore |
| Difference | about 6% | within the range of scope and timing |
Six per cent is not a discrepancy worth a headline. It is worth recording, because it is the first cost figure in this file where two independent sources agree within a plausible margin — Chennai 2 was 17% apart and NAV2’s ₹5,500 crore has no second source at all.
The other number in the launch coverage is the more interesting one: NTT’s total investment in Bengaluru is described as nearly ₹4,000 crore across 22 data centres in India, of which three were already operating in the city. That is the portfolio statement again, and it is roughly eleven times the cost of this one campus.
The registry’s rule holds: a portfolio total is not a building, and ₹2,400 crore against 67.2 MW is a building-level number that other developers can actually be measured against.
6Procurement
7Limits and open questions
- 67.2 MW is a build-out figure and counts zero here. Only 22.4 MW is live.
- Buildings B and C have no published stage, no hall count and no cost allocation.
- Acreage is published as both 8.5 and 18. The land-efficiency conclusion flips depending on which is used.
- Cost per megawatt across three campuses is indicative only. Bengaluru 4 uses a developer partnership, NAV2 uses a debt-funded project company, Chennai 2’s figure is an announced investment. They are not the same measurement.
- 17,000 sq m of data centre space is published for the campus, which implies 2,722 sq ft per megawatt and confirms that floor figures are not comparable across operators.
- No PUE, rack count, occupancy or tenant list.
- What would close it. A hall-level schedule and a rack count. Both would make this the most transparent large campus in India.
8Sources
Sources: NTT DATA announcement of the Bengaluru 4 opening of 13 June 2026, NTT Global Data Centers Bengaluru 4 campus page, Data Center Dynamics reporting on the Bengaluru 4 campus and the Prestige partnership, Economic Times Datacentres launch coverage, Business Standard, ANI and PTI release coverage, and Construction Week India on the December 2025 commissioning milestone.