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Facility record · Verified 26 Oct 2026

STT GDC Pune 4 — MaharashtraSTT GDC India · Pune · 18 MW, second largest card and the first of the expansion pair

Record PRJ-127Maharashtra — PuneTier C — single operator source4 public sources checkedAdditive: unknown — counts 0 MW
Expansion, under the reconciliationNo dateFacility45% of the headline
18MW
Card capacity
45%
Of the 40 MW headline
58MW
Footprint with this building
42MW
The expansion pair
22%
Of the 81 MW card sum
0
Dates published

STT GDC Pune 4 is 18 MW, the second largest of the five Pune cards. Under the only arrangement of those cards that reconciles to the published numbers, this is the first of two expansion buildings — the one that turns a 40 MW current footprint into a 58 MW one, and then an 81 MW one. Eighteen megawatts is 45% of today’s headline in a single building. No stage, no date, no rack count and no PUE are published, so the building that defines Pune’s next supply cycle is currently a number with nothing attached.

1At a glance

Operator
STT GDC India
Facility
Pune 4, Maharashtra
Capacity
18 MW, basis unresolved
Role
First of two expansion buildings under the reconciliation documented on PRJ-123
Against the headline
45% of the 40 MW current figure, in one building
Footprint effect
Takes Pune from 40 MW to 58 MW, and to 81 MW with Pune 5
Stage
Unverified. Not labelled under construction, unlike STT’s Noida cards
Additivity
Unknown. Counted at 0 MW

2The building where the headline changes

An expansion building is the most commercially interesting record in a portfolio, because it is where supply is decided.

All five cardswhat the page actually itemises81 MWHeadline plus this building40 MW current, plus 18 MW58 MWThe 40 MW headlinecurrent IT load, three facilities40 MWPune 4 — this recordthe first expansion building18 MWIf the reconciliation on PRJ-123 is right, this is the building where the current footprint becomes the old footprint.
Figure 1The current headline, the footprint with this building, and the card sum. Red is this record. The gap between navy and pale is what the Pune market is waiting on.
Three footprints for one city
FootprintMWBuildingsWhat it assumes
Current, per the headline40threethe inference on PRJ-123 is right
With this building58fourPune 4 delivers and is let
All five cards81fivePune 5 delivers as well
IT support capacity140—a site ceiling, not a building plan
Sanctioned power200 MVA—apparent power behind the whole site

Eighteen megawatts landing in Pune is a material event. The counted Pune market is 51.5 MW across two operators, so this single building is 35% of everything counted in the city.

Whether it lands in 2027 or 2029 changes the answer to the only question Pune tenants are asking: whether there is going to be enough capacity, and whether to sign now or wait.

3What 18 MW does to the Pune market

Pune is a two-operator market with a third of its capacity in one unbuilt building.

Pune, before and after
MeasureCounted todayWith Pune 4With Pune 4 and 5
Nxtra49.5 MW49.5 MW49.5 MW
Iron Mountain2 MW2 MW2 MW
STT, if counted0 MW18 MW42 MW
Market total51.5 MW69.5 MW93.5 MW
STT share0%26%45%

Two buildings take STT from invisible to the largest operator in Pune. That is not unusual for the Indian market — a single delivery cycle reorders the league table — but it is the specific reason dates matter more than capacities.

It also underlines the counting problem: at 93.5 MW the Pune market would be 45% STT, and this registry would still show the company at zero because of the flag. Any analysis built on the counted total is now wrong by nearly half the market.

4Procurement

Procurement window and scope
Gridvik assessment · 22 Oct 2026
What to buy here
Early capacity in an 18 MW building that will take STT from nothing to a third of the Pune market
Who holds the answer
STT GDC India commercial team
The one question
When does Pune 4 deliver, and what is the design density
Why they will answer it
Expansion buildings are pre-sold before completion, and the first tenants set the terms
Gridvik estimate
Delivery in 2027 or 2028 with a pre-let anchor. Labelled an estimate
What changes it
A construction start, a delivery date, or a density statement
All estimates are labelled as estimates. No tender dates claimed, no private contact data published.
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5Limits and open questions

  • No stage or date. The building may not have started.
  • No basis, racks, floor area or PUE.
  • The expansion role is inferred from the reconciliation, not stated by the operator.
  • No construction evidence in trade press or directories.
  • The 200 MVA sanction is shared across the site, so headroom for this building is not public.
  • What would close it. A delivery date. It would make this the most valuable record in the Pune market.

6Sources

Sources: STT GDC India Pune city page, STT GDC India facility pages for Pune, STT GDC India corporate site, Nxtra Pune material for the market comparison, and Indian market commentary on Pune data centre supply.