The median home in Mendham Township was built in 1976; there are 2,142 of them. What the code requires when that roof is replaced, and who signs off, is below.
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 Mendham Township, 97% 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
Which layers may stay is a Rehabilitation Subcode question in New Jersey (the IRC definitions are deleted by N.J.A.C. 5:23-3.21), and this site has not read that subcode yet. With 56% of Mendham Township’s homes were built before 1980, ask the contractor to count the layers before quoting.
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. Mendham Township 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
Rules as read on October 24, 2026. Everything else the state requires: roof replacement in New Jersey.
96% of the occupied homes in Mendham Township are lived in by their owners: 1,975 households, the people this line is for. By year built, 10% before 1940, 23% before 1960, 56% before 1980; 19% went up in 2000 or later. (ACS 2020–2024.)
By building type: 97% detached houses.
Of the 39 Morris County municipalities on this site, Mendham Township has the 31st largest share of homes built before 1980: 56%, against a county range of 42% to 87%.
ZIP codes: 07926 · 07945 · 07970
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Mendham Township | 1976 | 56% | 96% | 0% | 14 |
| Mendham Borough | 1972 | 73% | 86% | 14% | 13 |
| Randolph | 1977 | 56% | 78% | 7% | 12 |
| Morris | 1968 | 65% | 86% | 14% | 12 |
| Morristown | 1970 | 59% | 37% | 10% | 13 |
| Bernardsville | 1960 | 71% | 95% | 2% | 10 |
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.
Within 10 miles of Mendham Township, hail of an inch or more was reported on 14 days between 2006 and 2025, the biggest stones 1.75 in on July 7, 2013. The most recent was August 6, 2024.
Remnants of Hurricane Ida (DR-4614, September 2021) is the latest of 11 federal storm declarations covering Morris County since 2006. (OpenFEMA.)
A report says hail fell near Mendham Township, not that it damaged a 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; 97% 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 | Standing seam that carries its own loads can skip the tear-off (R908.3.1) |
| Slate | 75 years | Older houses; 10% here predate 1940 | Can’t be roofed over; check the framing for the weight |
| Flat roof: EPDM or TPO | 15 years | Porches, additions, low-slope rears | Coating is not a replacement |
Ask a roofer working in Mendham Township 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 price side is in what a new roof costs in New Jersey; the paperwork side in checking a roofing contractor.
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 Mendham Township, 97% 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 Mendham Township was built in 1976, 56% of homes were built before 1980, 96% are owner-occupied.
Hail of 1 inch or larger was reported on 14 days within 10 miles of Mendham Township 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 Mendham Township 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.