Township brief
Jefferson Township, measured.
111,928 residential parcels on the official record, median home built 1927. Every figure below is computed from the county assessor's file, county roof permits, FEMA + First Street flood layers. Aggregate only, and never a claim about any specific property.
111,928Homes on the county recordAssessor
1927Median year builtAssessor
1,796Homes with a roof permit on file (1.6%)County permits
107,500–108,000Homes 25+ yrs old with no roof permit on fileDerived · estimate
The stock
What Jefferson's housing is made of.
95.6% of Jefferson's homes predate 1980. 88.4% carry asphalt-shingle roofs, 58.2% are masonry-walled (not a siding market), and 88.2% have a full or partial basement. 86.6% are owner-occupied.
Flood exposure: 22 homes sit in a FEMA Special Flood Hazard Area, while 11,941 (10.7%) carry a First Street flood factor of 5+, which is water risk beyond the mapped floodplain.
The read for contractors
The 107,500–108,000 homes at 25+ years with no roof permit on file are where Jefferson's replacement cycle is furthest along. That cohort, minus fresh permits, is the campaign surface.
Stock profileAssessor · county permits
Re-roof waves
Jefferson's permit history has a shape.
Roof permits in Jefferson cluster into waves; the county file shows the biggest recent years to the right. Homes that didn't replace during a wave are aging on the same clock as the neighbors that did.
The read for contractors
Campaign the non-replacers inside a past wave's footprint. Demand that already proved itself once tends to prove itself again.
Biggest recent permit yearsCounty roof permits
| Year | Roof permits |
|---|---|
| 2024 | 587 |
| 2025 | 578 |
| 2022 | 392 |
More township briefs
Every Cook township, measured.
Start with the county-level brief, then drill into any of the 38 townships:
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South Chicago
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West Chicago
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Want Jefferson scored neighborhood by neighborhood?
This page is the township-level read. The Territory X-Ray ranks every Jefferson neighborhood on the full model (roof age and size, storm cohort, permit suppression, ownership) with the first campaign chosen.
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