Permit Record

MEP Plumbing

10409 S St Louis Ave, Chicago, IL

ClassificationPlumbing
Reliable valueNot in source
ContractorLeonard & Son Construction Company, INC →
Permit record
Parties
Contractor
Leonard & Son Construction Company, INC
Applicant
Not in source
Owner
Michael And Cara O'Connor
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
2414202096
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
41.7039, -87.7085
Geocode confidence
90%
Geocode source
Not in source
Issued
Nov 5, 2018
Applied
Nov 5, 2018
Work class
Not in source
Description
Source description

REVISION TO PERMIT 100741959 , CHANGE GC TO LEONARD & SON CONSTRUCTION, MASON TO SHANNON VIEW HOMES INC. , CHANGE HVAC TO HEATING & COOLING SOLUTIONS AND PLUMBER TO MAC PLUMBING INC

Provenance
First seen by PermitCore
May 2, 2026 · 13:03 UTC
Last seen
May 15, 2026 · 08:45 UTC
Last changed
May 5, 2026 · 04:40 UTC

Open in Chicago source →

Data-quality checks1 of 12 flagged

1 of 12 data-quality checks flagged on this permit. Detail below.

Valuation is placeholder
valuation_usd_is_placeholder

valuation_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

2 permits at this parcel (parcel 2414202096) · Feb 2, 2018 – Nov 5, 2018

  1. Nov 5, 2018This permitMEP PlumbingLeonard & Son Construction Company, INC
  2. Feb 2, 2018100741959Alteration Residential · Finaled$200,000Ryan & Joyce Development LLC - Construction

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

Other permits by Leonard & Son Construction Company, INC

Showing up to 12 most-recent permits by this contractor in the indexed window

No other permits by this contractor in the indexed window.
Developer details
Permit #
100791606
Canonical ID
3:100791606
Source permit ID
100791606
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