Data center campus · 580 Winter Street, Waltham, MA 02451 (BOS1-A); a second building at 115 Second Avenue, Waltham (BOS1-B), Middlesex County, Massachusetts
Centersquare BOS1 (Waltham)
Operating
as of Oct. 24, 2026
Centersquare (Csquare) markets colocation at its BOS1 site in Waltham's Route 128 corridor, with 38.2 MW of utility power and about 50,000 sq ft of raised floor. Also known as: Csquare Waltham BOS1, BOS1-A, BOS1-B.
Power38.2MW reported · stated
Floor area50,150sq ft
Who is behind it
ProjectCentersquare BOS1 (Waltham)Also: Csquare Waltham BOS1, BOS1-A, BOS1-B
Developer and teamCentersquare (Csquare)
End userNot found in the recordsNot yet named in any record or credited report we have found.
The record, newest first
Csquare's Boston page lists Waltham BOS1 with 38.2 MW of utility power and 50,150 sq ft of raised floor, and says space and power are available. (Csquare (Centersquare), Oct. 24, 2026; Csquare (Centersquare), Oct. 24, 2026)
Data Center Map lists a BOS1-B building at 115 Second Avenue, about a quarter mile from BOS1-A at 580 Winter Street. (Data Center Map, Oct. 24, 2026)
Conflicts and open questions
- Csquare's spec sheet gives 580 Winter Street for BOS1 and separately lists 115 Second Avenue, Waltham, without labeling it; Data Center Map lists the two as BOS1-A and BOS1-B about a quarter mile apart. They are treated as one campus.
- The operator page does not use the word 'operating' but offers space, power and tours; status taken as operating.
- Coordinates approximate from the Winter Street address.
The full record
- Power note
- Utility power capacity stated by Csquare; the same page lists 6.1 MW of UPS and 11 MW of generator capacity. IT load not stated.
- Evidence
- Primary public records
- Size class
- Under 50 MW (outside main scope; kept for completeness)