Half of the 16,712 homes in Plainfield were built before 1952. 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
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). Attached houses (5% of Plainfield’s homes) and any work that touches the structure fall outside the rule.
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. 85% of Plainfield’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 Plainfield 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 15,907 occupied homes in Plainfield, 7,125 (45%) are owner-occupied. Counting by decade, 36% before 1940, 62% before 1960, 85% before 1980 of the housing was in place, and 7% dates from 2000 on. (ACS 2020–2024.)
The housing is 42% detached houses, 5% attached single-family houses (rowhouses, twins and townhouses), 30% buildings of two to four units.
Older houses hide their history: ask the contractor to confirm the deck (board or sheet) and every layer above it before pricing, because slate or two layers mean a full tear-off.
Of the 21 Union County municipalities on this site, Plainfield has the 8th largest share of homes built before 1980: 85%, against a county range of 65% to 98%.
ZIP codes: 07060 · 07062 · 07063
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Plainfield | 1952 | 85% | 45% | 5% | 16 |
| North Plainfield | 1954 | 86% | 53% | 3% | 15 |
| Watchung | 1974 | 60% | 84% | 6% | 14 |
| Fanwood | 1954 | 83% | 85% | 4% | 15 |
| Scotch Plains | 1960 | 81% | 79% | 4% | 16 |
| South Plainfield | 1964 | 71% | 86% | 6% | 11 |
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 Plainfield, hail of an inch or more was reported on 16 days between 2006 and 2025, the biggest stones 1.75 in on September 9, 2023. The most recent was August 6, 2024.
That is more hail days than 80% of the places in the state on this site.
Union 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.
Lifespans come from HUD’s capital-needs table, not from a brochure. 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; 42% 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; 36% here predate 1940 | Sound slate can be reused (R908.5); broken slate cannot |
| Flat roof: EPDM or TPO | 15 years | Additions and porch roofs | Coating is not a replacement |
Any business offering home improvements in Plainfield 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.
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). Attached houses (5% of Plainfield’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 Plainfield was built in 1952, 85% of homes were built before 1980, 45% are owner-occupied.
Hail of 1 inch or larger was reported on 16 days within 10 miles of Plainfield 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 Plainfield 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.