Permit
Local ordinance, not the state
Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. The township code office can say what Pennsbury requires.
Source: 34 Pa. Code § 403.1(b)
Roof Replacement in Pennsbury, PA
Half of the 1,453 homes in Pennsbury were built before 1983. The rules below decide how much of the old roof has to come off and what goes under the new one.
New Roofing Costs connects homeowners with independent local roofing contractors. We do not perform roofing work.
Call (833) 781-1806 Replacement and new roofs only · homeowners
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.
The rules for a reroof in Pennsbury
Layers
Two layers means a tear-off
A new roof may go over one existing layer; with two or more, or over slate, clay or cement tile, everything comes off to the deck (IRC R908.3.1.1). 42% of Pennsbury’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
Pennsbury’s climate table decides
IRC R905.1.2 calls for an ice barrier where Table R301.2 says so; in Pennsylvania the municipality completes that table. Pennsbury’s answer is with the township code office.
Rules as read on October 24, 2026. Everything else the state requires: roof replacement in Pennsylvania.
Homes and roofs in Pennsbury
Owners live in 1,130 of Pennsbury’s occupied homes, or 81%. By year built, 8% before 1960, 42% before 1980; 16% went up in 2000 or later. (ACS 2020–2024.)
By building type: 73% detached houses, 14% attached single-family houses (rowhouses, twins and townhouses).
Of the 71 Chester County municipalities on this site, Pennsbury has the 36th largest share of homes built before 1980: 42%, against a county range of 12% to 80%.
ZIP codes: 19317
Pennsbury and the towns around it
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Pennsbury | 1983 | 42% | 81% | 14% | 15 |
| Birmingham | 1989 | 27% | 99% | 16% | 16 |
| Chadds Ford | 1983 | 44% | 92% | 14% | 17 |
| Kennett | 1991 | 38% | 77% | 19% | 10 |
| Pocopson | 1986 | 42% | 99% | 13% | 17 |
| Kennett Square | 1957 | 75% | 56% | 15% | 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.
Storm record around Pennsbury
NOAA’s storm reports show 15 days since 2006 with hail of at least 1 inch inside a 10-mile circle around Pennsbury, topping out at 2.5 in on May 22, 2014. The most recent was September 8, 2023.
Remnants of Hurricane Ida (DR-4618, September 2021) is the latest of 5 federal storm declarations covering Chester County since 2006. (OpenFEMA.)
A report says hail fell near Pennsbury, not that it damaged a roof. When wind or hail damage means a new roof.
What goes on the roof next
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; 73% 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 | Low pitches and long runs | Standing seam that carries its own loads can skip the tear-off (R908.3.1) |
| Slate | 75 years | Older and historic houses | Sound slate can be reused (R908.5); broken slate cannot |
| Flat roof: EPDM or TPO | 15 years | Porches, additions, low-slope rears | Coating is not a replacement |
Checking a contractor in Pennsylvania
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 Pennsbury and look it up.
The price side is in what a new roof costs in Pennsylvania; the paperwork side in checking a roofing contractor.
Questions about a new roof in Pennsbury
Do I need a permit to replace a roof in Pennsbury?
Local ordinance, not the state. Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. The township code office can say what Pennsbury requires.
Do the old shingles have to come off in Pennsbury?
A new roof may go over one existing layer; with two or more, or over slate, clay or cement tile, everything comes off to the deck (IRC R908.3.1.1). 42% of Pennsbury’s homes were built before 1980, so count the layers before comparing quotes.
How old are the houses in Pennsbury?
By the Census Bureau’s American Community Survey (2020–2024), the median home in Pennsbury was built in 1983, 42% of homes were built before 1980, 81% are owner-occupied.
Does Pennsbury get hail that damages roofs?
Hail of 1 inch or larger was reported on 15 days within 10 miles of Pennsbury from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
How do I check a roofing contractor in Pennsbury?
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 Pennsbury and look it up.
What they will ask on the phone
- The street address in Pennsbury, or at least the ZIP code
- The number of stories, and whether the house stands alone
- What covers the roof now and about when it went on
- The number of layers, if anyone has counted
- Your timing for a complete replacement
- Any historic-district or HOA rules on the house in Pennsbury
- That you own the home and decide on the roof
The full list: before you call.