The median home in Bethlehem City was built in 1957; there are 23,239 of them. Below: what the code asks of a replacement here, the permit, and the town’s own records.
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 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. So the city code office in Bethlehem City is the one to ask before work starts.
Source: 34 Pa. Code § 403.1(b)
Layers
IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. 79% of Bethlehem City’s homes were built before 1980; many have been reroofed before.
Ice barrier
IRC R905.1.2 calls for an ice barrier where Table R301.2 says so; in Pennsylvania the municipality completes that table. Ask the city code office or the contractor what Bethlehem City’s says.
Rules as read on October 24, 2026. Code edition, permit and contract rules for the whole state: roof replacement in Pennsylvania.
48% of the occupied homes in Bethlehem City are lived in by their owners: 10,606 households, the people this line is for. By year built, 33% before 1940, 55% before 1960, 79% before 1980; 9% went up in 2000 or later. (ACS 2020–2024.)
By building type: 35% detached houses, 30% attached single-family houses (rowhouses, twins and townhouses), 12% buildings of two to four units.
On a house built before 1940, ask what the deck is (boards or plywood) and whether slate sits under the later layers: slate can’t be roofed over.
Of the 34 Northampton County municipalities on this site, Bethlehem City has the 10th largest share of homes built before 1980: 79%, against a county range of 20% to 91%.
ZIP codes: 18015 · 18017 · 18018
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Bethlehem City, Northampton County | 1957 | 79% | 48% | 30% | 23 |
| Bethlehem City, Lehigh County | 1957 | 79% | 48% | 30% | 23 |
| Freemansburg | 1981 | 49% | 56% | 44% | 26 |
| Fountain Hill | 1947 | 89% | 58% | 35% | 24 |
| Hellertown | 1952 | 87% | 67% | 18% | 22 |
| Lower Saucon | 1979 | 51% | 88% | 14% | 20 |
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.
Since 2006 the National Weather Service has logged hail of 1 inch or larger on 23 separate days within 10 miles of Bethlehem City; the largest was 2 in on May 29, 2019. The most recent was July 3, 2025.
That is more hail days than 98% of the places in the state on this site.
Federal major-disaster declarations for storms in Northampton County since 2006: 6, most recently DR-4618, Remnants of Hurricane Ida, declared September 2021. (OpenFEMA.)
A report says hail fell near Bethlehem City, not that it damaged a 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; 35% 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 | Standing seam that carries its own loads can skip the tear-off (R908.3.1) |
| Slate | 75 years | Older houses; 33% here predate 1940 | Never a base for a new layer (R908.3.1.1); heavy |
| Flat roof: EPDM or TPO | 15 years | Low-slope roofs and rear sections (30% of homes here are attached) | Seams at walls and drainage |
Pennsylvania’s home improvement law (HICPA § 3, § 6) requires registration with the Attorney General from $5,000 a year of such work and puts the number on every estimate; ask for it in Bethlehem City and look it up.
The price side is in what a new roof costs in Pennsylvania; the paperwork side in checking a roofing contractor.
Ask Bethlehem City first. Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. So the city code office in Bethlehem City is the one to ask before work starts.
IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. 79% of Bethlehem City’s homes were built before 1980; many have been reroofed before.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Bethlehem City was built in 1957, 79% of homes were built before 1980, 48% are owner-occupied.
Hail of 1 inch or larger was reported on 23 days within 10 miles of Bethlehem City from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
Pennsylvania’s home improvement law (HICPA § 3, § 6) requires registration with the Attorney General from $5,000 a year of such work and puts the number on every estimate; ask for it in Bethlehem City and look it up.
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.