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Contractor name / Source history

Onni Contracting (Chicago) Inc

Filings naming this contractor, across the public source's longer history.

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Recent collected filings2
Earliest in these recordsJul 14, 2026
Latest in these recordsAug 31, 2026

This query uses the listed source name, ignoring letter case. Aliases and namesakes are not resolved, and this is not a company's verified complete work history. Dates mean issued / ready to issue. They do not establish construction start, completion, available bids, or work quality. Reported estimates are not added.

Filings by source date

Issued / ready
#101087061 · 200 N La Salle St$1,300,000

Source status: Active

Work description & named contractors

HVAC · Electrical · Plumbing

BONUS ELECTRIC · Contractor-Electrical

HEATMASTERS MECHANICAL LLC · Contractor-General Contractor

ONNI CONTRACTING (CHICAGO) INC · Contractor-General Contractor

JOHNS PLUMBING, INC. · Contractor-Plumber/Plumbing

Issued / ready
#101076997 · 931 N Halsted St$190,000,000

Source status: Active

Work description & named contractors

Roofing

SHAMROCK ELECTRIC CO.INC · Contractor-Electrical

ONNI CONTRACTING (CHICAGO) INC · Contractor-General Contractor

EWING-DOHERTY MECHANICAL, INC · Contractor-Plumber/Plumbing

HEATMASTERS INC · Contractor-Ventilation

Planning rows link to the City Clerk, ADU or Plan Commission source; their checked scope is shown on Planning. Application rows link to the public status portal and retain its separate date meanings. Permit source: City of Chicago Building Permits ↗. Queries cover available source filings from January 1, 2006, with up to 5,000 newest records. Voided/revoked permits are excluded by the source. Historical lookups stay separate from daily alerts and do not expand citywide coverage.