Township brief
New Trier Township, measured.
18,745 residential parcels on the official record. Median home built 1953. 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.
18,745Homes on the county recordAssessor
1953Median year builtAssessor
241Homes with a roof permit on file (1.3%)County permits
16,000–16,500Homes 25+ yrs old with no roof permit on fileDerived · estimate
The stock
What New Trier's housing is made of.
81.9% of New Trier's homes predate 1980. 80.6% carry asphalt-shingle roofs, 34.1% are masonry-walled (not a siding market), and 94.5% have a full or partial basement. 90.3% are owner-occupied.
Flood exposure: 591 homes sit in a FEMA Special Flood Hazard Area, while 1,557 (8.3%) carry a First Street flood factor of 5+ — water risk beyond the mapped floodplain.
The read for contractors
The 16,000–16,500 homes at 25+ years with no roof permit on file are where New Trier's replacement cycle is furthest along — that cohort, minus fresh permits, is the campaign surface.
Stock profileAssessor · county permits
Re-roof waves
New Trier's permit history has a shape.
Roof permits in New Trier 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 |
|---|---|
| 2023 | 71 |
| 2025 | 66 |
| 2024 | 65 |
Want New Trier scored neighborhood by neighborhood?
This page is the township-level read. The Territory X-Ray ranks every New Trier neighborhood on the full model — roof age and size, storm cohort, permit suppression, ownership — with the first campaign chosen.
Request a New Trier Territory X-Ray