Somerset County, NJ Roof Snow Load - 21 psf

How much snow is too much for a roof in Somerset County, NJ?

Picture it, not just weigh it: 46.2 in. if it's fresh powder, 16.8 in. once it settles, or a mere 4.2 in. if it's ice. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.

Somerset County, NJ: quick facts

• Design roof snow load21 psf
• Ground snow load, ASCE 7 map30 psf
• National rank#396 of 2,758
• New Jersey rank#2 of 17
• Population357,467
• Annual snowfall, NOAA normal23.9 in.
• FIPS34035

How Somerset County compares

21 psf ranks #396 of 2,758 US counties with a mapped snow load (top 14%) - and #2 of 17 in New Jersey. 20.1 psf is New Jersey's typical county figure - Somerset County beats it by 0.9 psf.

Population 357,467 (FIPS 34035), roughly 40.5655°N 74.6199°W. The 30 psf ground snow load ASCE 7-22 maps here becomes 21 psf once the code's own design factors are applied.

Typical snowfall in Somerset County, NJ

NOAA's 30-year normal for Somerset County: 23.9 in. of snow a year, from the WERTSVILLE 4 NE, NJ US station. (fresh vs. packed vs. ice explains why.)

What this Somerset County figure assumes

This is a county-level reference figure for a typical heated home built to Risk Category II (ordinary residential), on a partially exposed lot - the assumptions ASCE 7-22 itself treats as the default case. A steeper roof, a fully exposed hilltop lot, an unheated structure, or a higher risk category all change the actual number.

Somerset County's permit office wants an address-specific figure, not this county average - the ASCE 7 Hazard Tool is free, takes under a minute, and outputs a PDF most reviewers accept. (How this figure is calculated.)