Hillsdale has 3,602 homes, and half of them were standing by 1959. Below: what the code asks of a replacement here, the permit, and the town’s own records.
New Roofing Costs connects homeowners with independent local roofing contractors. We do not perform roofing work.
This number connects homeowners who are planning a new roof or a full roof replacement with independent local roofing contractors. It is not for leak repairs or patch jobs. The call must come from the homeowner who decides on the roof. Calls may be recorded.
Permit
Under N.J.A.C. 5:23-2.7 a reroof of a detached one- or two-family house goes ahead without a permit or a notice to the construction office. Attached houses (4% of Hillsdale’s homes) and any work that touches the structure fall outside the rule.
Source: N.J.A.C. 5:23-2.7
Layers
The state strikes the IRC reroof definitions from its code (N.J.A.C. 5:23-3.21) and leaves existing houses to the Rehabilitation Subcode, not yet checked here. 84% of Hillsdale’s homes were built before 1980, so get the layer count and a tear-off price in writing.
Source: N.J.A.C. 5:23-3.21
Ice barrier
Only Sussex County meets New Jersey’s 25 °F January test for a required ice barrier (N.J.A.C. 5:23-3.21; DCA Bulletin 07-3). For Hillsdale, ask whether the quote includes one anyway.
Source: N.J.A.C. 5:23-3.21; NJ DCA Bulletin 07-3
Checked against the code text on October 24, 2026. Code edition, permit and contract rules for the whole state: roof replacement in New Jersey.
93% of the occupied homes in Hillsdale are lived in by their owners: 3,229 households, the people this line is for. Counting by decade, 22% before 1940, 52% before 1960, 84% before 1980 of the housing was in place, and 6% dates from 2000 on. (ACS 2020–2024.)
The housing is 87% detached houses, 4% attached single-family houses (rowhouses, twins and townhouses).
Of the 68 Bergen County municipalities on this site, Hillsdale has the 16th largest share of homes built before 1980: 84%, against a county range of 30% to 93%.
ZIP codes: 07642
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Hillsdale | 1959 | 84% | 93% | 4% | 20 |
| Westwood | 1958 | 81% | 63% | 1% | 21 |
| Woodcliff Lake | 1967 | 66% | 86% | 1% | 20 |
| Washington Township, Bergen County | 1962 | 80% | 97% | 10% | 17 |
| Park Ridge | 1966 | 68% | 81% | 7% | 19 |
| River Vale | 1971 | 68% | 90% | 11% | 22 |
Median built: median year the homes were built. Before 1980: share of homes built then. Owners: share of homes that are owner-occupied. Row, twin: share of homes that are rowhouses, twins or townhouses. Census ACS 2020–2024. Hail days: days with hail of 1 inch or larger within 10 miles, 2006–2025, NOAA Storm Prediction Center.
Since 2006 the National Weather Service has logged hail of 1 inch or larger on 20 separate days within 10 miles of Hillsdale; the largest was 2.5 in on July 8, 2021. The most recent was August 3, 2024.
That is more hail days than 93% of the places in the state on this site.
At the county level, Hillsdale shares Bergen County’s record of 10 storm disaster declarations since 2006, the newest DR-4614 (Remnants of Hurricane Ida, September 2021). (OpenFEMA.)
Storm reports are what observers logged, not a measure of damage to any roof. When wind or hail damage means a new roof.
HUD’s useful-life figures are for planning; a warranty is a separate promise. For Hillsdale’s houses: More in the guides to shingles, metal, slate and flat roofs.
| Material | HUD useful life | Fits a house like | Watch for |
|---|---|---|---|
| Asphalt shingles | 20 years | Most pitched roofs; 87% of homes here are detached | Wind class set by the design wind speed (IRC Table R905.2.4.1) |
| Metal (standing seam, panels) | 50 years | Low pitches and long runs | A complete standing-seam system may go over the old roof (R908.3.1) |
| Slate | 75 years | Older houses; 22% here predate 1940 | Sound slate can be reused (R908.5); broken slate cannot |
| Flat roof: EPDM or TPO | 15 years | Additions and porch roofs | Seams at walls and drainage |
Ask a roofer working in Hillsdale for the New Jersey home improvement registration number, which the law requires on contracts and advertising (N.J.S.A. 56:8-138, 56:8-144), and look it up with the Division of Consumer Affairs.
Contracts, deposits and the right to cancel: checking a roofing contractor. What moves the price: new roof cost in New Jersey.
Detached houses: no permit, no notice. Under N.J.A.C. 5:23-2.7 a reroof of a detached one- or two-family house goes ahead without a permit or a notice to the construction office. Attached houses (4% of Hillsdale’s homes) and any work that touches the structure fall outside the rule.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Hillsdale was built in 1959, 84% of homes were built before 1980, 93% are owner-occupied.
Hail of 1 inch or larger was reported on 20 days within 10 miles of Hillsdale from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
Ask a roofer working in Hillsdale for the New Jersey home improvement registration number, which the law requires on contracts and advertising (N.J.S.A. 56:8-138, 56:8-144), and look it up with the Division of Consumer Affairs.
The full list: before you call.
Checked October 24, 2026. Laws and code editions change; the date says when these were last read at the source.