Winnebago County, Illinois: roof stress score 71.1 of 100
Winnebago County ranks #181 of 1,113 scored counties (high stress) and #9 of 46 in Illinois. Winnebago County homes: 86.8% predate 2000, median year 1971. Hail in Winnebago County (1 inch or more): 2.5 days a year. Permits in Winnebago County ran 16.3 per 1,000 homes, 2014 to 2025.
- 71.1score
- #181nationally
- #9in Illinois
- 1971median home year
Inputs behind the 71.1
| Input | Winnebago County | Median | Stress percentile | In IL |
|---|---|---|---|---|
| Homes built before 2000 | 86.8% | 80.4% | 73 | 53 |
| Severe hail days per year | 2.5 | 2.0 | 67 | 86 |
| New-home permits per 1,000 homes (inverted) | 16.3 | 35.5 | 73 | 58 |
Average of 73, 67 and 73: 71.1
Winnebago County on age: only 13.2% of homes date from 2000 or later. Winnebago County on hail: 27 severe days over 11 full years, 4 of them in 2023. Winnebago County on building: 16.3 permits per 1,000 homes; median 35.5.
Winnebago County: is your roof past its time?
Winnebago County hail days: NOAA 1 inch+ reports
Winnebago County homes by decade built
| pre-1940 | 15.4% |
|---|---|
| 1940s | 6.4% |
| 1950s | 14.2% |
| 1960s | 12.8% |
| 1970s | 14.9% |
| 1980s | 10.7% |
| 1990s | 12.3% |
| 2000s | 10.9% |
| 2010s | 2.0% |
| 2020+ | 0.2% |
124,959 housing units. Biggest slice: pre-1940, 15.4%. Before 1980: 63.8%. Since 2010: 2.3%.
New-home permits in Winnebago County
| 14 | 123 |
|---|---|
| 15 | 78 |
| 16 | 178 |
| 17 | 188 |
| 18 | 164 |
| 19 | 179 |
| 20 | 112 |
| 21 | 146 |
| 22 | 160 |
| 23 | 150 |
| 24 | 248 |
| 25 | 309 |
Winnebago County issued 2,035 single-family permits, equal to 1.6% of its 124,959 housing units. Pace: about 236 a year lately, up from 126 a year at the start. Peak: 309 permits in 2025.
Severe hail days in Winnebago County, by year
| 14 | 4 |
|---|---|
| 15 | 2 |
| 16 | 3 |
| 17 | 3 |
| 18 | 1 |
| 19 | 0 |
| 20 | 4 |
| 22 | 2 |
| 23 | 4 |
| 24 | 2 |
| 25 | 2 |
| 26* | 4 |
* partial year. Winnebago County: severe days in 10 of 11 full years (worst: 2023, 4 days).
Map of 77 hail reports in Winnebago County
Dots mark reports, not storm paths.
Winnebago County among Illinois counties
| County | Score | Pre-2000 | Hail days | Permits | Gap |
|---|---|---|---|---|---|
| Peoria County | 72.1 | 85.5% | 2.5 | 11.0 | +1.0 |
| Winnebago County | 71.1 | 86.8% | 2.5 | 16.3 | -0.0 |
| Sangamon County | 68.5 | 85.1% | 2.8 | 24.7 | -2.6 |
| Macon County | 63.1 | 92.0% | 1.3 | 8.8 | -8.0 |
4 published. Winnebago County on the Illinois map
Counties scoring near 71.1
| County | Rank | Score | Gap |
|---|---|---|---|
| Reno County, KS | #85 | 81.0 | +9.9 |
| Garfield County, OK | #91 | 80.4 | +9.3 |
| Peoria County, IL | #174 | 72.1 | +1.0 |
| Shawnee County, KS | #182 | 71.1 | -0.0 |
| St. Louis County, MN | #188 | 70.3 | -0.8 |
| Comanche County, OK | #190 | 69.9 | -1.2 |
Why Winnebago County lands at 71.1
Winnebago County: housing age pulls hardest, at the 73th percentile. Age stands at 73, hail at 67, renewal at 73. Your house may differ: the score of Winnebago County is not a verdict on one roof.
Winnebago County next steps
- Check an address in Winnebago County: hail check.
- Compare Winnebago County with roof age by city.
- Winnebago County roofers we list: Rockford.
Winnebago County data: NOAA (27 severe days), Census ACS (124,959 homes), Census BPS (2,035 permits). Method, limits and common questions