What the records say about Montville homes, rivers and winters

Montville's housing count depends on who is counting and when. Wikipedia gives 7,823 housing units for 2010 and no 2020 figure. The township's Facts and Figures page lists 7,897 households from the 2020 census. The 2025 housing plan counts 8,272 homes, and Census Reporter's 2024 five-year American Community Survey profile shows 8,602, give or take 353.

Households and housing units are different measures, and survey estimates carry margins of error, so the gap is not a contradiction. The plan's year-built table is the part that matters for roofing. More than half of the homes date from 1970 through 1999, which puts any original roofs between 27 and 56 years old.

The township counted 7,084 owner-occupied households and 813 renter-occupied ones in 2020, which puts renters at about one household in ten. The mix changes a short drive away. Boonton's housing plan shows renters in 43.2 percent of occupied homes, and the Parsippany-Troy Hills plan reports 39.3 percent renter-occupied homes in a count of 23,215.

In a rented building the owner decides about the roof, and a tenant's job is to tell the landlord what showed up and when. A dated photo of a stain helps that conversation along.

Morris County's 2025 hazard plan ranks flood, severe weather and severe winter storm as High hazards for Montville Township. The township annex counts 209 flood insurance policies in force, 5 repetitive-loss properties and 2 severe repetitive-loss properties, none of them mitigated yet. Its named residential trouble spot is the Normandy Drive, Sheffield Place, Lancaster, Manchester and Stiles Lane area, where frequent flooding has damaged homes. Changebridge Road floods from the Rockaway River, and Hatfield Creek is called prone to flooding. The annex also places some homes inside the inundation area of the Boonton Dam and lists outreach to residents downstream.

None of that is a roof problem, but the water a roof sheds lands on the same ground. Where the water goes follows a downspout outward from the eaves.

The state climatologist's page puts annual snowfall in northern New Jersey at 40 to 50 inches, against 10 to 15 in the far south. It gives an average of 163 days without a freeze in the northern highlands. By simple subtraction, roughly 200 days a year fall outside that stretch, and a freeze is possible on any of them.

Montville's snow and ice page puts sidewalk clearing on residents, within 24 hours after a snow event ends, along with driveway aprons and mailboxes. Icy streets are reported to public works in business hours and to the police after hours. The page does not mention roofs. The county hazard annex has its own winter item. Sump pumps that discharge into streets cause icing in extreme cold, and the township lists work on that among its actions.

Montville Township says it keeps residents informed through Nixle, Reverse 9-1-1, its web page and message boards, and encourages sign-ups. Residents who need extra help in an emergency can register through Register Ready.

For power, a 2018 JCP&L notice posted by Morris County says to report downed wires to the utility or to local police or fire. It says never to go near a downed line, even one that seems to be off. The utility's newsletter says to stay at least 30 feet from a downed power line and 100 feet from a downed high-voltage transmission line. It says to call 911 to report one. Its outage number is 888-544-4877. A Patch report from 12 December 2023 described power outages affecting an estimated 1,418 customers in Parsippany and Montville and named JCP&L as the utility.

A line down across a driveway is a 911 call or a utility call, never a roofing question.

If a stain, a sag or a trail of shingle pieces sits behind a question about these figures, a roof inspection is the usual first step. Call (862) 430-2399 and describe what you saw, where and when.