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Contractor name / Source history

Winslow Development Group Llc

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

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Recent collected filings3
Earliest in these recordsJul 24, 2026
Latest in these recordsSep 21, 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
#101088372 · 2123 W Cortland St$100

Source status: Active

Work description & named contractors

Plumbing

FERIK ELECTRICAL SERVICE,INC. · Contractor-Electrical

WINSLOW DEVELOPMENT GROUP LLC · Contractor-General Contractor

B&K CONCRETE 01 · Masonry Contractor

BACZYNSKI MASONRY INC · Masonry Contractor

WERMAR PLUMBING CORP · Contractor-Plumber/Plumbing

MURRAY MECHANICAL · Contractor-Refrigeration

MURRAY MECHANICAL · Contractor-Ventilation

Issued / ready
#101086037 · 907 W Webster Ave$3,000,000

Source status: Active

Work description & named contractors

New construction

FERIK ELECTRICAL SERVICE,INC. · Contractor-Electrical

WINSLOW DEVELOPMENT GROUP LLC · Contractor-General Contractor

B&K CONCRETE 01 · Masonry Contractor

BACZYNSKI MASONRY INC · Masonry Contractor

LS PLUMBING,INC. · Contractor-Plumber/Plumbing

MURRAY MECHANICAL · Contractor-Refrigeration

MURRAY MECHANICAL · Contractor-Ventilation

Issued / ready
#B200477822 · 638 W Arlington PlNot supplied

Source status: Complete

Work description & named contractors

Electrical · Plumbing

WERMAR PLUMBING CORP · Plumbing Contractor

WINSLOW DEVELOPMENT GROUP LLC · General Contractor

FERIK ELECTRICAL SERVICE,INC. · Electrical Contractor

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.