Township brief
Leyden Township, measured.
23,497 residential parcels on the official record. Median home built 1952. 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.
23,497Homes on the county recordAssessor
1952Median year builtAssessor
3,312Homes with a roof permit on file (14.1%)County permits
19,500–20,000Homes 25+ yrs old with no roof permit on fileDerived · estimate
The stock
What Leyden's housing is made of.
96.6% of Leyden's homes predate 1980. 97.3% carry asphalt-shingle roofs, 49.8% are masonry-walled (not a siding market), and 79.7% have a full or partial basement. 89.6% are owner-occupied.
Flood exposure: 1,046 homes sit in a FEMA Special Flood Hazard Area, while 1,030 (4.4%) carry a First Street flood factor of 5+ — water risk beyond the mapped floodplain.
The read for contractors
The 19,500–20,000 homes at 25+ years with no roof permit on file are where Leyden's replacement cycle is furthest along — that cohort, minus fresh permits, is the campaign surface.
Stock profileAssessor · county permits
Re-roof waves
Leyden's permit history has a shape.
Roof permits in Leyden 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 |
|---|---|
| 2020 | 1,275 |
| 2021 | 906 |
| 2022 | 895 |
Want Leyden scored neighborhood by neighborhood?
This page is the township-level read. The Territory X-Ray ranks every Leyden neighborhood on the full model — roof age and size, storm cohort, permit suppression, ownership — with the first campaign chosen.
Request a Leyden Territory X-Ray