Single-family residential only — verified against county records at every source.
Roof age 14–25 years — the Florida insurance replacement window.
No roofing permit on record newer than 14 years — the roof has not been replaced.
Sourced two ways: roofing permits (finaled 14–25 years ago) and original-construction roofs on homes built 2001–2012 with no roofing permit ever filed.
Sources
Housing stock: Florida DOR 2025 Final NAL tax rolls (county parcel data, use code 001 — single-family).
Permits: JaxEPICS (Duval) and WATS (St. Johns) official county permit records, 2001–present.