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 borough code office can say what West Chester requires.
Source: 34 Pa. Code § 403.1(b)
Roof Replacement in West Chester, PA
Half of the 8,087 homes in West Chester were built before 1954. 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 West Chester
Layers
One old layer can stay; two cannot
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). 75% of West Chester’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
West Chester’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. West Chester’s answer is with the borough code office.
Rules as read on October 24, 2026. Code edition, permit and contract rules for the whole state: roof replacement in Pennsylvania.
Homes and roofs in West Chester
Owners live in 2,753 of West Chester’s occupied homes, or 35%. By year built, 43% before 1940, 54% before 1960, 75% before 1980; 16% went up in 2000 or later. (ACS 2020–2024.)
By building type: 17% detached houses, 32% attached single-family houses (rowhouses, twins and townhouses), 17% buildings of two to four units.
With about one in three of homes attached, many roofs here meet a neighbor’s roof at a party wall. Say so on the call, and ask the contractor how the new roof will be tied in where it meets the house next door.
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 71 Chester County municipalities on this site, West Chester has the 3rd largest share of homes built before 1980: 75%, against a county range of 12% to 80%.
ZIP codes: 19383
West Chester and the towns around it
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| West Chester | 1954 | 75% | 35% | 32% | 10 |
| West Goshen | 1978 | 53% | 72% | 10% | 10 |
| East Bradford | 1987 | 27% | 88% | 35% | 15 |
| Westtown | 1981 | 47% | 83% | 11% | 15 |
| Thornbury Township, Chester County | 1994 | 27% | 77% | 26% | 15 |
| East Goshen | 1982 | 46% | 72% | 25% | 13 |
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 West Chester
NOAA’s storm reports show 10 days since 2006 with hail of at least 1 inch inside a 10-mile circle around West Chester, topping out at 2 in on August 10, 2008. The most recent was July 14, 2024.
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 West Chester, not that it damaged a roof. When wind or hail damage means a new roof.
What goes on the roof next
HUD’s useful-life figures are for planning; a warranty is a separate promise. For West Chester’s houses: 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; 17% 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; 43% here predate 1940 | Can’t be roofed over; check the framing for the weight |
| Flat roof: EPDM or TPO | 15 years | Low-slope roofs and rear sections (32% of homes here are attached) | Coating is not a replacement |
Checking a contractor in Pennsylvania
Before signing for a roof in West Chester, get the contractor’s PA registration number: the home improvement law requires registration with the Attorney General above $5,000 a year of such work, and the number on contracts and estimates (HICPA § 3, § 6).
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 West Chester
Does a roof replacement in West Chester need a 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 borough code office can say what West Chester requires.
Can a new roof go over the old one in West Chester?
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). 75% of West Chester’s homes were built before 1980, so count the layers before comparing quotes.
How old are the houses in West Chester?
By the Census Bureau’s American Community Survey (2020–2024), the median home in West Chester was built in 1954, 75% of homes were built before 1980, 35% are owner-occupied.
How many hail days has West Chester had?
Hail of 1 inch or larger was reported on 10 days within 10 miles of West Chester 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 West Chester?
Before signing for a roof in West Chester, get the contractor’s PA registration number: the home improvement law requires registration with the Attorney General above $5,000 a year of such work, and the number on contracts and estimates (HICPA § 3, § 6).
What they will ask on the phone
- The street address in West Chester, or at least the ZIP code
- Detached, twin or rowhouse, and the number of stories
- What covers the roof now and about when it went on
- Whether there is one layer or more, if you know
- That you want a new roof or a full replacement, and when you want the work done
- Any historic-district or HOA rules on the house in West Chester
- That you are the owner and the one who decides
The full list: before you call.