Cranbury has 1,327 homes, and half of them were standing by 1988. 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
New Jersey treats a new covering on a detached one- or two-family house as ordinary maintenance: no permit, no notice (N.J.A.C. 5:23-2.7). In Cranbury, 77% of homes are detached. An attached house, or work on rafters and beams, is not covered.
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. 34% of Cranbury’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. Cranbury is outside it, so whether to add one is up to you and the installer.
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.
Of 1,313 occupied homes in Cranbury, 1,123 (86%) are owner-occupied. Counting by decade, 14% before 1940, 25% before 1960, 34% before 1980 of the housing was in place, and 25% dates from 2000 on. (ACS 2020–2024.)
The housing is 77% detached houses, 11% attached single-family houses (rowhouses, twins and townhouses).
Of the 25 Middlesex County municipalities on this site, Cranbury has the 22nd largest share of homes built before 1980: 34%, against a county range of 26% to 88%.
ZIP codes: 08512
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Cranbury | 1988 | 34% | 86% | 11% | 8 |
| Hightstown | 1950 | 76% | 72% | 9% | 10 |
| Plainsboro | 1986 | 26% | 48% | 12% | 6 |
| East Windsor | 1976 | 60% | 61% | 23% | 10 |
| Monroe Township, Middlesex County | 1995 | 28% | 91% | 26% | 6 |
| Jamesburg | 1978 | 51% | 72% | 30% | 6 |
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 8 separate days within 10 miles of Cranbury; the largest was 1.5 in on April 1, 2023. The most recent was September 9, 2023.
That is fewer than most places in the state on this site (median 11 days).
At the county level, Cranbury shares Middlesex County’s record of 8 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 Cranbury’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; 77% 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; 14% here predate 1940 | Never a base for a new layer (R908.3.1.1); heavy |
| Flat roof: EPDM or TPO | 15 years | Additions and porch roofs | Coating is not a replacement |
Ask a roofer working in Cranbury 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.
No permit for a detached house. New Jersey treats a new covering on a detached one- or two-family house as ordinary maintenance: no permit, no notice (N.J.A.C. 5:23-2.7). In Cranbury, 77% of homes are detached. An attached house, or work on rafters and beams, is not covered.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Cranbury was built in 1988, 34% of homes were built before 1980, 86% are owner-occupied.
Hail of 1 inch or larger was reported on 8 days within 10 miles of Cranbury 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 Cranbury 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.