400 South LaSalle Data Center (Chicago)

Name: 400 South LaSalle Data Center (Chicago)
Address: US

Permitted

United States · 1 project · Last reported 2026-09-16

Summary

The City of Chicago issued Phase 3 of 3 of the building permits converting the existing 7-story office building at 400 S LaSalle St into a data center (permit 101084518, 16 September 2026, reported cost $151.1M). It covers interior alterations, new equipment and associated MEP upgrades. Phase 2 (101081181, 6 July 2026, $51.1M) covers infrastructure upgrades and floor reinforcement for the conversion, and Phase 1 (101083036, 1 July 2026) covers interior demolition. All three name owner Legacy GI TC 400 LaSalle LLC. Physical progress, completion and operation are not established. evidence

City of Chicago, Department of Buildings · published 2026-10-16

Location

The interactive map needs JavaScript. Display anchor: 41.87646, -87.63221 (Point locator, WGS 84).

View location: OpenStreetMap · Google Maps · Bing aerial · Copernicus Browser

Campus reference; individual project footprints are not mapped.

Projects (1)

400 South LaSalle office-to-data-center conversion (Phases 1–3)

Permitted last observed as of 2026-09-16 · Development consent

Dataset description: building permits issued by the city since 2006, excluding permits voided or revoked after issuance. Most permits are issued subject to fee payment, and work may not begin until the fee is paid. The captured metadata reports the rows were last updated on 16 October 2026. evidence

City of Chicago, Department of Buildings · publication date not stated

Column definitions: issue_date is, for most permit types, the date the city determined the permit ready to issue subject to fee payment. pin_list holds PINs disclosed by the applicant and verified by city staff. The latitude and longitude locate the property's primary address. evidence

City of Chicago, Department of Buildings · publication date not stated

The Assessor lists the property address of PIN 17-16-242-017 as 400 S La Salle St, Chicago, IL 60605, for tax years 2024 to 2026. evidence

Cook County Assessor's Office · publication date not stated

Column definitions: lon and lat are the parcel centroid longitude and latitude; x_3435 and y_3435 give the same centroid in EPSG:3435. evidence

Cook County Assessor's Office · publication date not stated

Companies

Owner: Legacy GI TC 400 LaSalle LLC (current) evidence

Source and location review

Status source

City of Chicago building permits for the 400 S LaSalle St office-to-data-center conversion evidence row
City of Chicago, Department of Buildings · published 2026-10-16 · Government record

Locator

Campus locator · Official source · official_tax_parcel_centroid evidence

Source checks

Not reviewed against imagery not_reviewed
No imagery review is recorded for this project. Its status rests only on the dated authoritative source. · no independent imagery verification

Status age at review: 41 days before the data update on 2026-10-27

Location details

Coordinates: 41.87646, -87.63221
Geometry licence: public-record-source-terms
Use scope: Campus locator
Scope class: official_tax_parcel_centroid
Authority: Official source
Source entity: Campus
Method: official_assessor_published_parcel_centroid
Derivation: direct_geometry
Precision scope: Cook County Assessor published centroid of tax parcel 17-16-242-017 (400 S LaSalle St, tax year 2026). It locates the building parcel, not a surveyed footprint, a particular floor or the works extent.
Horizontal uncertainty: Not reported
The Assessor publishes no positional accuracy for parcel centroids.
Geometry evidence: f80431a1

A locator places the site on the map. It is not a building footprint, a construction extent or a surveyed boundary unless the use scope is an official boundary, and even then it is a parcel or permit boundary.

Evidence

Sources are linked, not redistributed; each keeps its own terms. An archived copy is a lookup for the Wayback Machine capture nearest the retrieval date and may be unavailable or differ from what was reviewed. Each hash states what it covers; imported factual records are not publisher-page captures.

Evidence for 400 South LaSalle Data Center (Chicago)
Title	Publisher	Roles	Published	Retrieved	Licence	Attribution	Content hash (SHA-256)
City of Chicago Building Permits dataset (ydr8-5enu) metadata Archived copy	City of Chicago, Department of Buildings Government record	Site and project identity	not stated	2026-10-16	public-record-source-terms	City of Chicago — Building Permits open data	`4a39a6af0662cf751f77d71fcabdfa92b0cedc8eedaf999452e3aa026a4a3445` Retained source material; see source provenance
City of Chicago Building Permits dataset column definitions Archived copy	City of Chicago, Department of Buildings Government record	Site and project identity	not stated	2026-10-16	public-record-source-terms	City of Chicago — Building Permits open data	`da7e9165518e5813a8bcbc70d74d190bd3c0a63c90be133400474509ec58f1f7` Retained source material; see source provenance
City of Chicago building permits for the 400 S LaSalle St office-to-data-center conversion Archived copy	City of Chicago, Department of Buildings Government record	Development consent, Owner claim	2026-10-16	2026-10-16	public-record-source-terms	City of Chicago — Building Permits open data	`8dc3eaa324d6d29edd2ab2438ece10769e17b8290a6284a4c6982de73c8089c6` Retained source material; see source provenance
Cook County Assessor Parcel Addresses: PIN 17-16-242-017 Archived copy	Cook County Assessor's Office Government record	Site and project identity	not stated	2026-10-16	public-record-source-terms	Cook County Assessor's Office, Illinois	`66b47ef1b0ee60655ffa8701356440efac28e54b7a46bcd07e03a5a2d02cfbac` Retained source material; see source provenance
Cook County Assessor Parcel Universe column definitions Archived copy	Cook County Assessor's Office Government record	Site and project identity	not stated	2026-10-16	public-record-source-terms	Cook County Assessor's Office, Illinois	`b4963b13a1f6e4925c8c66481dc2e1fc290edb6ffead759d51a4e02db2f7f1d0` Retained source material; see source provenance
Cook County Assessor Parcel Universe: PIN 17-16-242-017 parcel centroid Archived copy	Cook County Assessor's Office Government record	Geometry	not stated	2026-10-16	public-record-source-terms	Cook County Assessor's Office, Illinois	`6ae7fd1464759cb9890afb5d085a12c8d0346c299f3b50771d25bdb7285738db` Retained source material; see source provenance

Cite this site

Kyars, K. (2026). 400 South LaSalle Data Center (Chicago) [site vcc-site-4eb4e1954e068943ce51]. In Data Center Atlas (2026-10-27) [Data set]. https://kiankyars.github.io/datacenter-atlas/sites/vcc-site-4eb4e1954e068943ce51/

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