Half of the 2,338 homes in Tewksbury were built before 1978. Below: what the code asks of a replacement here, the permit, and the town’s own records.
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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. That covers the 87% of Tewksbury’s homes that are detached; twins, rowhouses, townhouses and structural work are outside it.
Source: N.J.A.C. 5:23-2.7
Layers
New Jersey deletes the IRC’s reroofing definitions (N.J.A.C. 5:23-3.21(c)2.xxii); its layer rule for existing houses is in the Rehabilitation Subcode, which this site has not read yet. 54% of Tewksbury’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
The state code’s ice barrier applies where the average January day is 25 °F or colder: Sussex County, per DCA Bulletin 07-3. In Tewksbury it is the installer’s and the manufacturer’s call; ask whether the quote includes it.
Source: N.J.A.C. 5:23-3.21; NJ DCA Bulletin 07-3
Checked against the code text on October 24, 2026. The state’s code edition and the rest of its rules: roof replacement in New Jersey.
Of 2,292 occupied homes in Tewksbury, 2,196 (96%) are owner-occupied. Counting by decade, 12% before 1940, 19% before 1960, 54% before 1980 of the housing was in place, and 19% dates from 2000 on. (ACS 2020–2024.)
The housing is 87% detached houses, 10% attached single-family houses (rowhouses, twins and townhouses).
Of the 23 Hunterdon County municipalities on this site, Tewksbury has the 14th largest share of homes built before 1980: 54%, against a county range of 27% to 93%.
ZIP codes: 07830 · 07979 · 08833 · 08858
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Tewksbury | 1978 | 54% | 96% | 10% | 4 |
| Lebanon Borough | 1980 | 49% | 59% | 26% | 6 |
| Bedminster | 1985 | 19% | 79% | 41% | 7 |
| High Bridge | 1971 | 68% | 84% | 15% | 7 |
| Peapack and Gladstone | 1970 | 65% | 80% | 2% | 6 |
| Washington Township, Morris County | 1979 | 52% | 91% | 5% | 5 |
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.
NOAA’s storm reports show 4 days since 2006 with hail of at least 1 inch inside a 10-mile circle around Tewksbury, topping out at 1.25 in on September 8, 2023.
That is fewer than most places in the state on this site (median 11 days).
Hunterdon County has had 8 federal major-disaster declarations for storms since 2006; the latest was 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.
Useful life is HUD’s planning figure, not a warranty. 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 | Simple roofs with long, unbroken slopes | A complete standing-seam system may go over the old roof (R908.3.1) |
| Slate | 75 years | Older houses; 12% here predate 1940 | Can’t be roofed over; check the framing for the weight |
| Flat roof: EPDM or TPO | 15 years | Additions and porch roofs | Coating is not a replacement |
Any business offering home improvements in Tewksbury must be registered with the New Jersey Division of Consumer Affairs, with the number on its contracts and ads (N.J.S.A. 56:8-138, 56:8-144); 47,473 registrations were active in October 2026.
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. That covers the 87% of Tewksbury’s homes that are detached; twins, rowhouses, townhouses and structural work are outside it.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Tewksbury was built in 1978, 54% of homes were built before 1980, 96% are owner-occupied.
Hail of 1 inch or larger was reported on 4 days within 10 miles of Tewksbury from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
Any business offering home improvements in Tewksbury must be registered with the New Jersey Division of Consumer Affairs, with the number on its contracts and ads (N.J.S.A. 56:8-138, 56:8-144); 47,473 registrations were active in October 2026.
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.