328 S Jefferson
328 S Jefferson, Chicago, IL 60661
40% provisional source coverage
USE BOUNDARYNot verified · Not dispatch ready
328 S Jefferson is a office building at 328 S Jefferson, Chicago, IL 60661 associated with Chicago benchmark ID 103815. It is Graph Mapped as a Public Seed, not Verified or Dispatch Ready.
Canonical identity
City of Chicago's covered-buildings record identifies 328 S Jefferson in the Near West Side as a commercial building in the greater-than-250,000-square-foot cohort. Current public real-estate material presents the address as a 10-story office building and calls it the former Igoe Mercantile Exchange Building. Public portfolio material associates the location with Blue Star Properties, but no parcel, title, management, operational, or authorization relationship is projected.
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
City of Chicago's covered-buildings record identifies 328 S Jefferson in the Near West Side as a commercial building in the greater-than-250,000-square-foot cohort. Current public real-estate material presents the address as a 10-story office building and calls it the former Igoe Mercantile Exchange Building. Public portfolio material associates the location with Blue Star Properties, but no parcel, title, management, operational, or authorization relationship is projected.
Sources reviewed August 18, 2026Evidence boundary
Parcel, title, control, management, operator and action authority are not inferred from public identity evidence.
Boundary reviewed August 18, 2026Coverage state
Public Seed / Graph Mapped only; explicit unknowns are retained for later enrichment.
Accepted August 18, 2026Questions this record answers
Each concise answer includes the same caveats shown elsewhere on the page.
01What is 328 S Jefferson?+
328 S Jefferson is a office building at 328 S Jefferson, Chicago, IL 60661 associated with Chicago benchmark ID 103815. It is Graph Mapped as a Public Seed, not Verified or Dispatch Ready.
02Is 328 S Jefferson ready for dispatch?+
No. It is a Public Seed and Graph Mapped, not Verified or Dispatch Ready.
03What remains unknown about 328 S Jefferson?+
No authoritative Cook County Assessor, Clerk recording, Recorder, or legal-description read-back verified a PIN, parcel extent, assessment account, deed, current recorded owner, beneficial owner, or control chain. No current management agreement, legal operator identity, facilities scope, security contract, leasing authority, work-order authority, emergency contact, access authority, or dispatch authority was verified. No complete current tenant roster, suite allocation, occupancy percentage, lease status, component relationship, or occupancy count was verified. No address-specific permit, inspection, certificate, violation, fire/life-safety, accessibility, environmental, zoning-enforcement, or regulatory-status record was verified. No telecom provider, service availability, riser/demarcation, wiring, network, contract, access, or authorization was verified. No visitor, contractor, delivery, loading, parking, security, emergency, access, work-order, or dispatch rule was verified.
Explicit unknowns
Anything operationally material that is stale, incomplete, or unconfirmed remains visible here.
- 01No authoritative Cook County Assessor, Clerk recording, Recorder, or legal-description read-back verified a PIN, parcel extent, assessment account, deed, current recorded owner, beneficial owner, or control chain.
- 02No current management agreement, legal operator identity, facilities scope, security contract, leasing authority, work-order authority, emergency contact, access authority, or dispatch authority was verified.
- 03No complete current tenant roster, suite allocation, occupancy percentage, lease status, component relationship, or occupancy count was verified.
- 04No address-specific permit, inspection, certificate, violation, fire/life-safety, accessibility, environmental, zoning-enforcement, or regulatory-status record was verified.
- 05No telecom provider, service availability, riser/demarcation, wiring, network, contract, access, or authorization was verified.
- 06No visitor, contractor, delivery, loading, parking, security, emergency, access, work-order, or dispatch rule was verified.
Evidence register
Source links are direct. Authority and supported claim groups are stated so readers can inspect the underlying record.
- 01City of Chicago, Energy Benchmarking Covered Buildings ↗
Official API row retrieved 2026-08-18; source row has verification_year 2027. · Supports: Source-scoped public facts only; The covered-buildings list is distinct from energy-use data. It does not establish title, parcel scope, ownership, management, operation, energy performance, reporting completion, compliance, or authorization.
- 02Revere / Cushman & Wakefield investment marketing ↗
Current public broker marketing page retrieved 2026-08-18; no publication date exposed. · Supports: Source-scoped public facts only; Marketing for a proposed sale. It is not evidence of parcel/legal boundary, recorded title, current control, tenant roster, occupancy, management agreement, operational procedure, or authority.
- 03Blue Star Properties public website ↗
Current public company portfolio homepage retrieved 2026-08-18; no publication date exposed. · Supports: Source-scoped public facts only; Portfolio presentation only; it does not establish a deed, present ownership, beneficial ownership, control, management, operational responsibility, or authority.
- 04The Real Deal trade press ↗
Published 2025-12-16; retrieved 2026-08-18. · Supports: Source-scoped public facts only; Secondary reporting; no deed, recording, title commitment, loan document, control-chain document, or authority instrument was reviewed.
- 05Cook County Assessor's Office ↗
Official public address-search page retrieved 2026-08-18. · Supports: Source-scoped public facts only; No address-specific property result was captured; it does not support any PIN, parcel, assessment, owner, or title claim.
Public change history
Only meaningful, accepted public deltas appear here. The current record above remains canonical.
328 S Jefferson
328 S Jefferson was added as a public, evidence-bounded building seed at 328 S Jefferson, Chicago, IL 60661; unresolved enrichment and authority fields remain explicit.