4256 Wesley Terrace
IndustrialCook County, Illinois · PJM
At a glance
4256 Wesley Terrace is an industrial datacenter candidate site in Cook County, Illinois, scoring 54.6/100 DC Readiness — 124th of 745 scored sites in the county. It sits in the PJM grid region and the COMMONWEALTH EDISON CO service territory, where interconnection has averaged 4.8 years from request to operation.
Power & interconnection
Speed to power
Deep queue and long historical waits — plan for a multi-year interconnection timeline and engage the utility early.
Connectivity
Risk & environment
Location context
Regulatory climate
New-DC state tax exemptions suspended for 2 years (from Jul 2026).
Incentive detail: Enterprise Zone sales tax exemption; High Impact Business designation for $12M+ DC investments.
Site location
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How does 4256 Wesley Terrace compare with other sites in Cook County?
4256 Wesley Terrace ranks 124th of 745 scored candidate sites in Cook County. Its 54.6/100 is roughly in line with the county average of 54.5. It is roughly in line with the Illinois average of 54.3 and roughly in line with the national average of 53.2.
Against the Illinois average, its strongest sub-score is fiber connectivity (84 vs 71) and its weakest is power availability (30 vs 37). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is 4256 Wesley Terrace to power, fiber and other datacenters?
The nearest located transmission bottleneck is NILES-EVERGFE B 138 KV (PJM), 6 miles away. For connectivity, the nearest internet exchange facility is Digital Realty CHI (9377 Grand Ave) at 2 miles. 18 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is Digital Realty Chicago ORD12, 2 miles away.
What are the flood, water and hazard risks at 4256 Wesley Terrace?
At the county level, FEMA's National Risk Index rates Cook County "Relatively High".
Full DC Readiness breakdown
All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.
Nearby comparable sites
Other scored datacenter candidate sites in Cook County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| UNKNOWN122269 | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 71.2 |
| UNKNOWN124436 | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 70.1 |
| UNKNOWN122285 | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 68.5 |
| UNKNOWN124699 | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 66.7 |
| UNKNOWN122531 | Substation-Adjacent | 345 kV | 600 MW | 3.0 yrs | 65.9 |
| BEDFORD PARK | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 65.7 |
| BLUE ISLAND | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 65.7 |
| UNKNOWN122289 | Substation-Adjacent | 345 kV | 600 MW | 4.8 yrs | 65.6 |
4256 Wesley Terrace: common questions
What is the DC Readiness score of 4256 Wesley Terrace?
4256 Wesley Terrace scores 54.6/100 on the GridCensus DC Readiness scale, rated fair. It ranks 124th of 745 scored sites in Cook County. The Cook County average is 54.5 and the Illinois average is 54.3.
Which electric utility serves 4256 Wesley Terrace?
COMMONWEALTH EDISON CO (investor owned) holds the retail service territory that contains the site; its holding company is EXELON CORP.
What grid region is 4256 Wesley Terrace in?
4256 Wesley Terrace is in the PJM region. Projects interconnecting there have averaged a 4.8-year wait from queue request to operation.
How far is 4256 Wesley Terrace from an internet exchange?
The nearest internet exchange facility is Digital Realty CHI (9377 Grand Ave), about 2 miles away; 18 fiber providers report service at the location.
Related pages
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “4256 Wesley Terrace, Cook County, IL”, https://gridcensus.com/datacenter-sites/illinois/cook-county/4256-wesley-terrace-3f8090d7 (data as of October 10, 2026).
Dataset updated . Screening estimates derived from public data sources.
Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.
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