Morristown has 9,360 homes, and half of them were standing by 1970. 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
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 25% of Morristown’s homes that are detached; twins, rowhouses, townhouses and structural work are outside it.
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. With 59% of Morristown’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. In Morristown 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 9,069 occupied homes in Morristown, 3,325 (37%) are owner-occupied. Counting by decade, 24% before 1940, 39% before 1960, 59% before 1980 of the housing was in place, and 25% dates from 2000 on. (ACS 2020–2024.)
The housing is 25% detached houses, 10% attached single-family houses (rowhouses, twins and townhouses), 18% buildings of two to four units.
Of the 39 Morris County municipalities on this site, Morristown has the 25th largest share of homes built before 1980: 59%, against a county range of 42% to 87%.
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Morristown | 1970 | 59% | 37% | 10% | 13 |
| Morris | 1968 | 65% | 86% | 14% | 12 |
| Morris Plains | 1964 | 65% | 72% | 2% | 13 |
| Hanover | 1976 | 56% | 79% | 13% | 13 |
| Harding | 1967 | 66% | 90% | 11% | 13 |
| Madison | 1961 | 70% | 64% | 6% | 13 |
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 13 days since 2006 with hail of at least 1 inch inside a 10-mile circle around Morristown, topping out at 1.75 in on July 7, 2013. The most recent was August 6, 2024.
Morris County has had 11 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; 25% 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 | Roofs that will carry solar later | A complete standing-seam system may go over the old roof (R908.3.1) |
| Slate | 75 years | Older houses; 24% 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 | Where the roof meets a wall or parapet |
New Jersey had 47,473 active home improvement registrations in October 2026; the one belonging to whoever quotes your roof in Morristown should be on the contract (N.J.S.A. 56:8-144).
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 25% of Morristown’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 Morristown was built in 1970, 59% of homes were built before 1980, 37% are owner-occupied.
Hail of 1 inch or larger was reported on 13 days within 10 miles of Morristown from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
New Jersey had 47,473 active home improvement registrations in October 2026; the one belonging to whoever quotes your roof in Morristown should be on the contract (N.J.S.A. 56:8-144).
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.