Bengaluru 4C is the last of three identical 22.4 MW buildings on NTT’s Devanahalli campus. It is the building that takes the site to its announced 67.2 MW of critical IT and 100 MW of facility load. Nothing has been published about it. Not a construction start, not a date, not a floor area, not a cost. The campus announcement covers it in a single clause and Building A’s launch does not mention it. That makes this the thinnest record in the NTT set and one of the thinnest in the registry — and it is the right way to record it. What can be said is useful: the site, the substation and the land are already in place, so 4C is a demand question rather than an infrastructure one. And at 22.4 MW it is the fourth NTT building in India at exactly that size, which means its cost, floor and density can be estimated from its siblings with reasonable confidence.
1At a glance
2The last third
Three buildings, one year of announcements covering all of them and one launch covering one. The delivery ladder for the campus is short and mostly empty.
| Level | Critical IT | Facility at 1.49 | Share |
|---|---|---|---|
| Live today | 22.4 MW | about 33.4 MW | 33% |
| With Building B | 44.8 MW | about 66.8 MW | 67% |
| With Building C | 67.2 MW | 100 MW | 100% |
Note that the facility figure at completion is exactly the 100 MW NTT publishes for the campus, which is the fourth time in this registry that a multi-building NTT campus closes on its own components. NAV1 closes to within 2%, Noida 2 closes to zero, Chennai 2 closes to zero, and this one closes to zero.
That is either a very disciplined planning process or a very disciplined public relations process. Either way, it is checkable, and it is rare enough in this market to be worth the page.
3What completion looks like
If all three buildings arrive, Devanahalli is one of the larger single-operator campuses in India. That is worth pricing against the rest of the file.
| Campus | Critical IT at build-out | Facility load | Land |
|---|---|---|---|
| Chandivali, Mumbai | 136.1 MW counted today | 250 MW plan | multiple buildings |
| NAV2, Airoli | 336 MW | 500 MW | 54 acres |
| NAV1, Mahape | about 100 MW | 150 MW | 8 acres |
| Bengaluru 4 | 67.2 MW | 100 MW | 8.5 acres |
| Chennai 2, Ambattur | 34.8 MW | about 52 MW | 6 acres |
| Noida 2 | 52.8 MW | about 79 MW | 6 acres |
At completion Bengaluru 4 would be the third-largest NTT campus in India behind Airoli and Chandivali, and the largest outside the Mumbai region. Its ₹35.7 crore per megawatt capital cost, published on the parent record, makes it the cheapest large campus in the file to build.
The practical consequence for a buyer is that this is where NTT’s Indian price competition will come from. Capacity built at ₹35.7 crore per megawatt can be leased at rates that a campus built at ₹80 crore cannot match, and Kolkata is at ₹80.
That gap — 2.2 times between the cheapest and the most expensive NTT megawatt in India — is the single most useful thing this registry has produced on pricing, and neither end of it is published anywhere as a comparison.
4Procurement
5Limits and open questions
- Stage is unverified. No source in the reviewed set publishes anything about Building C beyond its place in the campus total.
- 22.4 MW counts zero here and cannot be added to Buildings A or B.
- The seven-hall structure is a campus design figure, not a Building C specification.
- No cost, floor area, rack count or PUE is allocated to this building.
- The ₹35.7 crore per megawatt figure is a campus-level cost and cannot be attributed to any single building.
- The 220 kV substation headroom for a fourth building is not published. A campus described as three buildings may or may not be expandable.
- This is a five-section page on purpose. It is the thinnest record in the NTT set and padding it would be invention.
6Sources
Sources: NTT Global Data Centers Bengaluru 4 campus page stating 67.2 MW across three buildings, NTT DATA announcement of 13 June 2026, press release material distributed in December 2025 describing three buildings of seven 3.2 MW halls each, and Data Center Dynamics reporting on the campus.