Permit Record

Alteration Residential

1641 W 21st St, Chicago, IL

ClassificationPERMIT - RENOVATION/ALTERATIONResidential Alteration
Reliable value$45,000
Contractor3F Construction, LLC. →
Permit record
Parties
Contractor
3F Construction, LLC.
Applicant
Not in source
Owner
3FLTH Iv LLC Holdings 1
Architect
Not in source
Engineer
Not in source
Contractor license
Not in source
Building & lot · PLUTO
Building class
Not in source
Zoning district
Not in source
Lot area
Not in source
Year built
Not in source
Units (total)
Not in source
Units (residential)
Not in source
Units (commercial)
Not in source
Floor area
Not in source
Parcel & enrichment
Parcel APN
1719425008
Climate zone (IECC)
5A
Roof area (est.)
Not derivable — no building-size signal for this permit
HVAC tonnage (est.)
Not derivable — no building-size signal for this permit
Building type
Not in source
Building subtype
Not in source
Geocode & dates
Coordinates
41.8540, -87.6678
Geocode confidence
90%
Geocode source
Not in source
Issued
Mar 2, 2016
Applied
Jul 29, 2015
Work class
Residential
Description
Source description

INTERIOR ALTERATION TO DECONVERT 2DU TO SINGLE FAMILY FOR EXISTING COACH HOUSE BRICK BUILDING AS PER PLAN

Status
Current status
finaled
Source status
COMPLETE
Provenance
First seen by PermitCore
May 2, 2026 · 12:59 UTC
Last seen
May 15, 2026 · 08:43 UTC
Last changed
May 12, 2026 · 00:29 UTC

Open in Chicago source →

Data-quality checks0 of 12 flagged

0 of 12 data-quality rules flagged anything on this permit.

Checks not flagged

  • Geocode out of bounds
  • Geocode is sentinel
  • Issued date in the future
  • Issued date parse bug
  • Issued date is placeholder
  • Commercial units is placeholder
  • Residential units out of bounds
  • Residential units is placeholder
  • Total units out of bounds
  • Total units is placeholder
  • Valuation out of bounds
  • Valuation is placeholder
Project timeline at this parcel

4 permits at this parcel (parcel 1719425008) · Jul 16, 2014 – Mar 2, 2016

  1. Mar 2, 2016This permitAlteration Residential · Finaled$45,0003F Construction, LLC.
  2. Aug 26, 2015100597288Alteration Residential · Expired$75,0003F Construction, LLC.
  3. Aug 3, 2015100607648Alteration Residential$18,500
  4. Jul 16, 2014100550421Roofing$1,900

Full permit history at this parcel · as of Jul 8, 2026.

Other permits by 3F Construction, LLC.

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Developer details
Permit #
100597307
Canonical ID
3:100597307
Source permit ID
100597307
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