The LaSalle Wacker Building
221 N LaSalle St, Chicago, IL 60601
70% provisional source coverage
USE BOUNDARYNot verified · Not dispatch ready
The LaSalle Wacker Building is one 41-story corner office building addressed as both 221 North LaSalle Street and 121 West Wacker Drive. Chicago Benchmark ID 103639 explicitly uses the AKA relationship, while the legal multi-PIN assembly and current title remain unresolved.
Canonical identity
This Public Seed resolves a material dual-address identity question without collapsing multiple permit PINs into one parcel. The City benchmark point is visibly excluded from routing because it conflicts with address-linked records.
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.
Dual-address identity
City and federal historic evidence support 121 W Wacker and 221 N LaSalle as frontages of one building.
Evidence reviewed August 16, 2026Geometry caution
The benchmark coordinate is materially inconsistent with the canonical address and cannot be used for routing or parcel matching.
Conflict retained August 16, 2026Operating rules
No access, loading, life-safety, telecom, after-hours or dispatch procedure was accepted.
Public-source review completed August 16, 2026Questions this record answers
Each concise answer includes the same caveats shown elsewhere on the page.
01Are 121 W Wacker and 221 N LaSalle separate buildings?+
No. The retained government evidence strongly supports one corner building with two street frontages.
02Does the dual address prove one parcel?+
No. Multiple permit PINs remain visible and require authoritative parcel/title reconciliation.
03How can I correct or enrich this record?+
Submit an authoritative public link or dated official document and identify whether it may be displayed publicly, used only for verification, or retained privately. Tenant handbooks, dock and freight guidance, move rules and COI packages enter evidence review and never overwrite accepted claims directly.
Explicit unknowns
Anything operationally material that is stale, incomplete, or unconfirmed remains visible here.
- 01Current deed holder, beneficial owner and exact parcel or condominium assembly.
- 02Current management agreement, authorized site representative and tenant roll.
- 03Access, dock, freight, move, safety, telecom, utility and vendor procedures.
Evidence register
Source links are direct. Authority and supported claim groups are stated so readers can inspect the underlying record.
- 01Chicago Energy Benchmarking record 103639 ↗
City of Chicago · Supports: Explicit 121 W Wacker AKA 221 N LaSalle identity and 2023 benchmark fields
- 02LaSalle-Wacker historic district registration ↗
National Park Service · Supports: Single corner-building form, 41 stories and both street facades
- 03LaSalle Wacker regulatory notice ↗
Illinois EPA · Supports: Facility name, 221 N LaSalle address and historical permittee relationship
- 04121 W Wacker leasing listing ↗
Cushman & Wakefield · Supports: Current-facing property name and leasing contacts only
Public change history
Only meaningful, accepted public deltas appear here. The current record above remains canonical.
The LaSalle Wacker Building
Factum published a Public Seed resolving 121 W Wacker and 221 N LaSalle as one LaSalle Wacker Building while preserving multi-PIN, title, area, and geometry limits.