307 S Sangamon St
307 S Sangamon St, Chicago, IL 60607
92% provisional source coverage
USE BOUNDARYNot verified · Not dispatch ready
307 S Sangamon St is an office building at 307 S Sangamon St in Chicago. EPA identifies the address as an office building, while The Walsh Group Headquarters remains an attributed historical project name rather than a current control claim.
Canonical identity
EPA and a first-party project history support one office building at this address. Conflicting area and construction-vintage records remain unreconciled; current title, occupancy, management, and operating rules remain unknown.
Area claims stay separate
Gross, rentable, and office area are not interchangeable. Factum stores each measurement with its source meaning instead of choosing a convenient single number.
What public guidance supports
These are sourced research answers, not permission to enter, reserve, submit, or dispatch. Current affected-party authorization remains required.
Public identity
EPA identifies one office building at 307 S Sangamon St; the historical project account also identifies the address-level building.
EPA information current as of 2025; reviewed 2026-08-30Evidence boundary
Area and construction chronology conflict across sources. Historical project naming and time-bounded registry metadata do not establish current ownership, occupancy, management, or control.
Reviewed 2026-08-30Coverage state
Public Seed / Graph Mapped only; parcel, title, operator, tenants, access, safety, authorization, operating, and dispatch rules remain unknown.
Accepted 2026-08-30Questions this record answers
Each concise answer includes the same caveats shown elsewhere on the page.
01What is 307 S Sangamon St?+
It is an office building at 307 S Sangamon St in Chicago. EPA lists the address as 307 S SANGAMON.
02Is it The Walsh Group Headquarters?+
That is an attributed historical project name. It is not used here as evidence of current ownership, tenancy, management, or control.
03Is the record ready for dispatch?+
No. It is a Public Seed and Graph Mapped, not Verified or Dispatch Ready.
Explicit unknowns
Anything operationally material that is stale, incomplete, or unconfirmed remains visible here.
- 01current legal owner, parcel/PIN, operator, manager, occupants, and tenants
- 02reconciled gross floor area and construction/renovation chronology
- 03current certification status after the 2025 registry vintage
- 04access, safety, authorization, operating, and dispatch rules
Evidence register
Source links are direct. Authority and supported claim groups are stated so readers can inspect the underlying record.
- 01ENERGY STAR Registry — 307 S SANGAMON ↗
U.S. Environmental Protection Agency; information current as of 2025 and reviewed 2026-08-30 · Supports: address, office classification, and dated registry identity
- 02Walsh Headquarters is LEED Platinum ↗
The Walsh Group historical project account; March 2012 and reviewed 2026-08-30 · Supports: historical project name and address-level building history
Public change history
Only meaningful, accepted public deltas appear here. The current record above remains canonical.
307 S Sangamon St
Factum published 307 S Sangamon St as a Public Seed with its office identity sourced and historical naming, area, and construction conflicts preserved.