Half of the 993 homes in West Grove were built before 1971. 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.
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
Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). Whether West Grove wants a permit is in its own ordinance; ask the borough code office before the old roof comes off.
Source: 34 Pa. Code § 403.1(b)
Layers
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). 59% of West Grove’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
The code requires an ice barrier where the local climate table (Table R301.2) says so, and each Pennsylvania municipality fills that table in. Ask the borough code office or the contractor what West Grove’s says.
Checked against the code text on October 24, 2026. Everything else the state requires: roof replacement in Pennsylvania.
Owners live in 755 of West Grove’s occupied homes, or 77%. Counting by decade, 26% before 1940, 39% before 1960, 59% before 1980 of the housing was in place, and 15% dates from 2000 on. (ACS 2020–2024.)
The housing is 69% detached houses, 21% attached single-family houses (rowhouses, twins and townhouses).
Of the 71 Chester County municipalities on this site, West Grove has the 13th largest share of homes built before 1980: 59%, against a county range of 12% to 80%.
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| West Grove | 1971 | 59% | 77% | 21% | 10 |
| London Grove | 1997 | 26% | 96% | 7% | 10 |
| Penn Township, Chester County | 2002 | 19% | 78% | 12% | 9 |
| Avondale | 1938 | 69% | 62% | 25% | 10 |
| New Garden | 1994 | 26% | 77% | 7% | 12 |
| Franklin Township, Chester County | 1994 | 28% | 94% | 3% | 12 |
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.
Within 10 miles of West Grove, hail of an inch or more was reported on 10 days between 2006 and 2025, the biggest stones 1.75 in on July 25, 2010. The most recent was May 3, 2025.
At the county level, West Grove shares Chester County’s record of 5 storm disaster declarations since 2006, the newest DR-4618 (Remnants of Hurricane Ida, September 2021). (OpenFEMA.)
Storm reports are what observers logged, not a measure of damage to any 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; 69% 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 | A complete standing-seam system may go over the old roof (R908.3.1) |
| Slate | 75 years | Older houses; 26% 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 (21% of homes here are attached) | Where the roof meets a wall or parapet |
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 West Grove and look it up.
Contracts, deposits and the right to cancel: checking a roofing contractor. What moves the price: new roof cost in Pennsylvania.
Ask West Grove first. Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). Whether West Grove wants a permit is in its own ordinance; ask the borough code office before the old roof comes 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). 59% of West Grove’s homes were built before 1980, so count the layers before comparing quotes.
By the Census Bureau’s American Community Survey (2020–2024), the median home in West Grove was built in 1971, 59% of homes were built before 1980, 77% are owner-occupied.
Hail of 1 inch or larger was reported on 10 days within 10 miles of West Grove 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 West Grove 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.