FLORIDA ROOF AGE INDEX · ST. JOHNS COUNTY, FL
Roof Age Data for St. Johns County, FL
Live permit roof age data
ReroofGen has a dated roof for 84% of the 105,000+ single family homes in St. Johns County, built from county and city building permit records. That is 88,000+ homes where you can see how old the roof is before anyone visits, calls, or mails.
6,000+ of those dated roofs are 20 or more years old. Every count is from the Florida Roof Age Index as of November 3, 2026, refreshed quarterly.
St. Johns County, FL has permit backed roof ages for 84% of its 105,000+ single family homes (88,000+ dated roofs), with 6,000+ roofs 20+ years old, as of November 3, 2026.
St. Johns County, FL roof age, measured
Counts from county and municipal building permit records, as of November 3, 2026. Part of the Florida Roof Age Index.
- Single family homes: 105,000+
- Dated roof records: 88,000+ (84% of homes)
- Dated roofs 20+ years: 6,000+
- Median dated roof age: 6 years
- Roof permit records held: 47,000+
St. Johns County has 105,000+ single family homes, 88,000+ of them (84%) with a dated roof record as of November 3, 2026. 6,000+ dated roofs are 20 or more years old. The median dated roof is 6 years old.
St. Johns County, FL data coverage
- Permit backed roof age: Live
- Year built: Authoritative
- Estimated home value: Authoritative
- Owner mailing address: Authoritative
- Owner occupancy signal: Best official signal
- Length of residence: Derivable
- Building square footage: Not yet available
- Roof cover type: Not yet available
- Mortgage signal: Not yet available
Key takeaways
- 88,000+ of 105,000+ single family homes in St. Johns County have a dated roof from a building permit.
- 6,000+ dated roofs are 20+ years old: the homes most likely to need a replacement.
- The median dated roof in St. Johns County is 6 years old.
- 47,000+ roof permit records back these numbers, matched to parcels on the ReroofGen map.
How roof age is measured in St. Johns County
Each dated roof comes from a real reroof or new roof permit filed with the county or one of its cities, matched to the parcel it covers. A home without a matching permit is shown as undated, never as an original roof, so the 84% figure is a floor, not an estimate.
St. Johns County clears the index bar of 40% of homes dated, which is when the index publishes a county's full numbers and a median roof age.
Working St. Johns County with ReroofGen
Filter the map to roofs 20+ years old, see the owner and whether they live in the home, save the street as a list, and send postcards or a Project Manager to exactly those doors. Storm alerts show which of these roofs sit under a live National Weather Service warning.
- 6,000+ roofs 20+ years old to target today
- Owner, occupancy and parcel data on the same map
- Lists for canvassing, CRM follow up and direct mail
Frequently asked questions
How many homes in St. Johns County have an old roof?
As of November 3, 2026, 6,000+ single family homes in St. Johns County have a permit dated roof 20 or more years old. These count dated roofs only, so the real number is higher.
Where does ReroofGen get roof age for St. Johns County?
From county and city building permit records: 47,000+ roof permit records matched to parcels. No roof age is modeled or guessed from the year a home was built.
How often is St. Johns County roof data updated?
The Florida Roof Age Index is republished quarterly, and the ReroofGen map reads the same roof coverage rollup every day.
See how ReroofGen surfaces roof age across an entire territory
