Alteration Residential
9857 S Cottage Grove Ave, Chicago, IL
ClassificationPERMIT - EASY PERMIT PROCESSResidential Alteration
Reliable valueNot in source
ContractorDeerfield Construction Group, INC →
Permit record
Parties
- Contractor
- Deerfield Construction Group, INC
- Applicant
- Not in source
- Owner
- Christina Wilburn
- 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
- 2511118032
- 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
- 41.7149, -87.6047
- Geocode confidence
- 90%
- Geocode source
- Not in source
- Issued
- Jan 4, 2022
- Applied
- Jan 4, 2022
- Work class
- Residential
Description
Source description
REVISION TO CHANGE OF GENERAL CONTRACTOR PERMIT #100937182 TO DEERFILED CONSTRUCTION GROUP.
Provenance
- First seen by PermitCore
- May 2, 2026 · 13:08 UTC
- Last seen
- May 15, 2026 · 08:47 UTC
- Last changed
- May 5, 2026 · 04:40 UTC
Data-quality checks1 of 12 flagged
1 of 12 data-quality checks flagged on this permit. Detail below.
- Valuation is placeholder
valuation_usd_is_placeholdervaluation_usd matched a known placeholder (often 0 or 1) used by the source when the real valuation wasn't reported.
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
Project timeline at this parcel
- Jan 4, 2022This permitAlteration ResidentialDeerfield Construction Group, INC
- Nov 5, 2015100622491Alteration Residential$20,000Midwest Underground Tech., INC.
- Mar 30, 2015100587816Alteration Residential$5,000Sru Electric INC
Full permit history at this parcel · as of Jul 8, 2026.
Other permits by Deerfield Construction Group, INC
Developer details
- Permit #
- 100954087
- Canonical ID
- 3:100954087
- Source permit ID
- 100954087