STT GDC Navi Mumbai 2 is 49 MW — 36.8% of the company’s 133 MW Mumbai portfolio sits in this one building. It is 3.5 times the entire three-building Mumbai city portfolio and 49 times the smallest building in it. It is also described in public by one number and nothing else: no basis, no rack count, no PUE, no stage, no date. That combination is the point of this page. The largest asset in an Indian data centre portfolio is routinely the least documented, because the operator has no need to market a building that is already full.
1At a glance
2Concentration in one building
Portfolio risk in Indian data centres is usually discussed at company level. It is really a question about single buildings.
| Measure | Figure | Reads as |
|---|---|---|
| Share of the portfolio | 36.8% | one building, more than a third of the company |
| Share of Navi Mumbai | 41.2% | of the 119 MW suburban base |
| Share of Mumbai city, by contrast | 6.8% | the largest city building is a seventh of this one |
| Two largest buildings | 91 MW | 68.4% of the portfolio in two assets |
| Buildings needed for half the portfolio | 2 | concentration, not diversification |
| Basis published for the largest asset | none | the biggest number has the least support |
For a tenant this is a straightforward dependency question: if your capacity is in this building, your availability is the building’s availability, and the portfolio around it does not help you. For an investor it is a valuation question, because 37% of a portfolio’s capacity in one asset is a single point of failure in the numbers as well as the power train.
None of this is unusual. Indian data centre capacity is concentrated in a handful of very large halls, and every operator’s portfolio looks like this. It matters because portfolio totals are quoted as if the capacity were distributed.
3What 49 MW would hold
The building is large enough that the density assumption changes its commercial identity completely.
| Assumed density | Racks | Floor area at 100 W a sq ft | What it is |
|---|---|---|---|
| 5 kW a rack | 9,800 | about 490,000 sq ft | a large enterprise colocation hall |
| 8 kW a rack | 6,125 | about 490,000 sq ft | a current-generation market build |
| 12 kW a rack | 4,083 | about 490,000 sq ft | an AI-capable hall, if it has the cooling |
Somewhere around half a million square feet and four to ten thousand cabinets, depending entirely on a design decision nobody has published. At the low end this is one of the largest enterprise colocation buildings in India. At the high end it is one of the few buildings in the country that could take a serious accelerated-compute deployment.
Both readings are consistent with a single published figure of 49 MW. That is why a capacity number alone is not intelligence.
4Why the biggest asset is the thinnest record
There is a pattern in this file: the buildings with the most detail are the ones being marketed, and the buildings with the most megawatts are the ones with none.
| Building | MW | Racks | PUE | Basis | Stage |
|---|---|---|---|---|---|
| Navi Mumbai 2 | 49 | no | no | no | no |
| Navi Mumbai 3 | 42 | no | no | no | no |
| Navi Mumbai 1 | 28 | no | no | no | no |
| Mumbai 3 | 9 | no | no | no | no |
| Mumbai 1 | 4 | no | no | no | no |
| Mumbai 2 | 1 | no | no | no | no |
Six buildings, six blanks. In this case the uniformity is the finding: STT publishes a capacity per building and nothing else per building, across the whole Indian portfolio. The 400 MW Palava campus gets a groundbreaking and a land parcel; the 49 MW building that carries a third of the company gets a number on a page.
CtrlS shows the same pattern in a different form — its most-described site is the one with the most unusual number (36.8 MW at Mumbai DC 4), and its largest claim (700 MW at Chandanvelly) has no building at all.
Marketing effort and asset size are inversely correlated. The pages with the most detail are the newest and emptiest buildings; the buildings that are full publish a number and move on.
So reading operator sites top-down gives you a picture of the pipeline and almost none of the operating base.
5Procurement
6Limits and open questions
- No basis. 49 MW is unlabelled IT or gross, and the difference is roughly a third of the building.
- No racks, floor area, PUE or stage. Five of the eight questions this registry asks are unanswered.
- Single source. Only the operator page carries the figure.
- No tenant information. Who occupies a third of this portfolio is not public.
- Concentration risk is inferred, not stated. The 36.8% is arithmetic from published cards, not an operator disclosure.
- What would close it. A design density and a basis. Two figures would turn the largest building in this portfolio into the most useful record in it.
7Sources
Sources: STT GDC India Mumbai city page, STT GDC India corporate site, STT GDC facility pages for Navi Mumbai, and Indian market commentary on Navi Mumbai data centre capacity and the Mumbai market.