Project facts
| Address | 351 E 21ST ST, Chicago, IL |
|---|---|
| Jurisdiction | City of Chicago, IL (Cook County) |
| Operator named in the records | Equinix, Digital Realty |
| Furthest step on record | Building permit issued, February 14, 2025 |
| Capacity stated in a filing | None stated |
| Floor area stated | 26,690 sq ft |
| Site area stated | None stated |
| Records on file | 19, from August 4, 2006 to February 13, 2025 |
Records on file
| Filed | Type and status | What the record says | Source |
|---|---|---|---|
| Building permit Building permit issued | FIRE ALARM: MODIFICATION OF EXISTING SYSTEM. ASSOCIATED BUILDING PERMIT:101036937. AFFECTS: 0 DWELLING UNITS; 0 NON-RESIDENTIAL UNITS. HIGH-RISE BUILDING: YES. VOICE COMMUNICATION: YES. SPECIAL LOCKING: NO. MONITORING TYPE: SUPERVISING STATION . SPECIFIC LOCATION: THIRD FLOOR, NORTH DATA CENTER. Applicant: EQUINIX | Record | |
| Building permit Building permit issued | FIRE ALARM: MODIFICATION OF EXISTING SYSTEM. ASSOCIATED BUILDING PERMIT:101036937. AFFECTS: 0 DWELLING UNITS; 0 NON-RESIDENTIAL UNITS. HIGH-RISE BUILDING: YES. VOICE COMMUNICATION: YES. SPECIAL LOCKING: NO. MONITORING TYPE: SUPERVISING STATION . SPECIFIC LOCATION: THIRD FLOOR, SOUTH DATA CENTER. Applicant: PAYNE BRIAN | Record | |
| Building permit Building permit issued | RELOCATE SEVEN 30 TON LIEBERT CHILLED WATER AIR HANDLING UNITS WITHIN THE QWEST DATA CENTER LOCATED ON THE FIRST FLOOR. Applicant: DIGITAL REALTY TRUST | Record | |
| Building permit Building permit issued | RENOVATION OF EXISTING DATA CENTER OFFICE SPACE TO BUILD COMPARTMENTS #5 AND #11 SUITE#600*CONDITIONAL PERMIT SUBJECT TO AUDIT AND FIELD INSPECTION Applicant: LA MAR, CAROL GWENDOLYN | Record | |
| Building permit Building permit issued | REMODELING OF PREVIOUSLY CONSTRUCTED COMPUTER ROOMS WITHIN A DATA CENTER TO ADD ELECTRICAL PANELS, REVISE LIGHTING, MECHANICAL, AND SPRINKLERS IN 8TH FLOOR ( SUITE 880) AS PER PLANS Applicant: SHEEHAN, NEIL J | Record | |
| Building permit Building permit issued | RENOVATION OF EXISTING DATA CENTER SPACE TO BUILD COMPARTMETN #7. CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTION. Applicant: LA MAR, CAROL GWENDOLYN | Record | |
| Building permit Building permit issued | INTERIOR REMODELING OF A PREVIOUSLY OCCUPIED 6TH FLOOR SPACE TO SERVE AS DATA CENTER AS PER PLANS Applicant: SHEEHAN, NEIL J | Record | |
| Building permit Building permit issued | RENOVATION OF EXISTING 8TH FLOOR INFRASTRUCTURE TO SUPOORT DATA CENTER SPACE (GENS/FUEL TANK PARALLEL GEAR) (CONDITIONAL PERMIT ISSUED LESS THE DAY TANKS - DOE PERMIT TO BE ISSUED SEPARATELY) Applicant: DIGITAL REALTY TRUST | Record | |
| Building permit Building permit issued | BUILDOUT OF EXISTING 8TH FLOOR DATA CENTER SPACE. (CONDITIONAL APPROVAL SUBJECT TO FIELD INSPECTION) Applicant: DIGITAL REALTY TRUST | Record | |
| Building permit Building permit issued | RENOVATION OF EXISTING DATA CENTER TENANT SPACE TO ACCOMMODATE NEW SERVER EQUIPMENT. *CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTION. Applicant: RYAN NEW | Record | |
| Building permit Building permit issued | EXPANSION OF EXISTING CHILLER PLANT IN SUPPORT OF EXISTING DATA CENTER EQUIPMENT EXPANSION IN BASEMENT, ON 9TH FL., AND ROOFTOP. Applicant: ROBERT PETROWSKI | Record | |
| Building permit Building permit issued | INFRASTRUCTURE RENOVATION IN SUPPORT OF 4TH FLOOR DATA CENTER WITH WORK IN BASEMENT, 2ND, 4TH, AND 8TH FLOORS PER PLANS. Applicant: DIGITAL REALTY TRUST | Record | |
| Building permit Building permit issued | TENANT BUILDOUT OF EXISTING 4TH FLOOR DATA CENTER (SUITES 440, 450, 460) SPACE PER PLANS.CONDTIONAL PERMIT SUBJECT TO FIELD INSPECTION. Applicant: DIGITAL REALTY TRUST | Record | |
| Building permit Building permit issued | TENANT BUILDOUT OF EXISTING 4TH FLOOR DATA CENTER (SUITES 410,420, 430) SPACE PER PLANS.CONDTIIONAL PERMIT SUBJECT TO FIELD INSPECTION. Applicant: DIGITAL REALTY TRUST | Record | |
| Building permit Building permit issued | RENOVATION OF SUPPORT SPACES FOR 4TH DATA CENTER SPACE PER PLANS. CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTION. Applicant: DIGITAL REALTY TRUST | Record | |
| Building permit Building permit issued | RENOVATION OF EXISTING FIRST FLOOR DATA CENTER (APPROXIMATELY 26690 SF) FOR C/D/E SPACES INCLUDING 1200 SF EQUIPMENT ROOM IN BASEMENT AS PER PLANS. *CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTION Applicant: LA MAR, CAROL GWENDOLYN | Record | |
| Building permit Building permit issued | INSTALL INFRASTRUCTURE TO SUPPORT SUITE 600 DATA CENTER, INCLUDING ROOFTOP CHILLERS, FIRST FLOOR GENERATORS, AND FUEL STORAGE TANKS PER PLANS. Applicant: DIGITAL REALTY TRUST | Record | |
| Building permit Building permit issued | PHASE 3A RENOVATION OF EXISTING DATA CENTER SPACE @ 1ST FLOOR - CONDITIONAL PERMIT PENDING FIELD INSPECTION - Applicant: LA MAR, CAROL GWENDOLYN | Record | |
| Building permit Building permit issued | RENOVATION OF EXISTING DATA CENTER SPACE FOR SUITE 600.CONDITIONAL PERMIT SUBJECT TO FIELD INSPECTION. Applicant: LA MAR, CAROL GWENDOLYN | Record |
Every row comes from a public permit, air-quality or planning record, linked to its source. A permit shows that work was proposed or approved. It does not show that space is available or that a building is finished. Capacity figures carry the basis the filing gives.
Cite this page
Data Center Scouts, "Equinix and Digital Realty data center at 351 E 21st St, Chicago, IL," https://datacenterscouts.com/data-center-projects/illinois/351-e-21st-st-chicago/, updated October 9, 2026. Source records are linked on the page. Journalists and researchers are welcome to use this data with a link back.
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