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Research/Chicago/Peoples Gas Building
Public SeedReviewed August 15, 2026

Peoples Gas Building

122 S Michigan Ave, Chicago, IL 60603

QUALITY STATE

20% provisional source coverage

USE BOUNDARY

Not verified · Not dispatch ready

Direct answer

The Peoples Gas Building is the historic D. H. Burnham & Company building at 122 South Michigan Avenue. Current project pages conflict between an office label and a stated 428-unit apartment conversion, so present use, occupancy, ownership and operating authority remain unverified.

Completed1910Published property record
StoriesUnknownConflicting or unavailable
Critical fields sourced20/10020% provisional coverage
Dispatch readyNoLive accuracy audit required
01

Canonical identity

This Public Seed resolves the historic physical asset and preserves the live use conflict. It does not treat 122 Property LLC, Phoenix Development Partners or The Prime Group as a proven title holder, manager or authorization authority, and it makes no claim that the residential conversion is complete.

Property typeHistoric office building with a publicly stated residential-conversion plan
Management routeNo current role-verified property manager or operating contact was found. Phoenix Development Partners and The Prime Group are current project-page associations only.
Ownership claimCurrent title, PINs and condominium-interest structure were not verified. Historical condominium-interest evidence is not current ownership proof.
Location41.87991, -87.62493
02

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.

City benchmark gross floor area512,369 sq ft2023 City benchmarking record; current use and conversion scope remain unresolved
Historical Klaff condominium interest361,473 sq ftHistorical 2000 fee-simple condominium-interest scope, sold in 2004; not a current whole-building measure
03

What public guidance supports

These are sourced research answers, not permission to enter, reserve, submit, or dispatch. Current affected-party authorization remains required.

Historic identity

The National Park Service identifies the Peoples Gas Building at 122 South Michigan Avenue as NRHP resource 84000293 and attributes it to D. H. Burnham & Company.

Historic register issued in 1984; reviewed August 15, 2026

Current-use conflict

Phoenix Development Partners states a 428-unit conversion targeted for the second quarter of 2026, while The Prime Group labels the project Office. Neither page proves completion or current occupancy.

Undated current project pages reviewed August 15, 2026

Dispatch state

No current building-specific management, move, access, COI, life-safety or telecom authorization source qualified for dispatch.

Public-source review completed August 15, 2026
04

Questions this record answers

Each concise answer includes the same caveats shown elsewhere on the page.

01What is the Peoples Gas Building?+

It is the historic building at 122 South Michigan Avenue, attributed by the National Park Service to D. H. Burnham & Company and associated with significant years 1910 and 1911.

02Has it been converted to apartments?+

A developer page states a 428-unit conversion targeted for the second quarter of 2026, but another current project page labels the asset Office. Completion and occupancy were not independently verified.

03Who owns or manages it?+

Current legal title and management were not verified. Public project associations are not treated as ownership or authorization authority.

04How can I improve this record?+

Submit a current public permit, occupancy record, title source, handbook, move rule or COI package and state whether it may be displayed publicly, used only for verification or retained privately. Contributions enter evidence review.

05

Explicit unknowns

Anything operationally material that is stale, incomplete, or unconfirmed remains visible here.

  1. 01Current title holder, Cook County PINs and present condominium-interest structure.
  2. 02Whether the apartment conversion was permitted, completed or occupied and the building's present primary use.
  3. 03Current owner, developer, property manager and role-verified operating contacts.
  4. 04Current tenant or resident population and occupancy status.
  5. 05Current move, loading, freight, access, COI, life-safety and telecom/riser authorization rules.
  6. 06The relationship of 122 Property LLC to title, management or operational authority.
06

Evidence register

Source links are direct. Authority and supported claim groups are stated so readers can inspect the underlying record.

  1. 01
    National Park Service — Peoples Gas Building ↗

    U.S. National Park Service · Supports: Historic name, address, NRHP ID, architect and significant years

  2. 02
    Chicago Historic Michigan Boulevard District ↗

    City of Chicago · Supports: Historic-district geography and designation context

  3. 03
    Phoenix Development Partners — 122 S Michigan ↗

    Current first-party project page · Supports: Publisher-stated 428-unit apartment-conversion plan and Q2 2026 target

  4. 04
    The Prime Group — 122 South Michigan ↗

    Current first-party project page · Supports: Current project association and conflicting Office label

  5. 05
    Klaff Realty — 122 South Michigan history ↗

    Former participant retrospective · Supports: Historical 2000–2004 condominium-interest scope

  6. 06
    Chicago Energy Benchmarking — Covered Buildings ↗

    City of Chicago · Supports: Benchmark ID 101841, address, geography and 2023 gross-floor-area field