Half of the 750 homes in South Coatesville were built before 1970. 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 South Coatesville 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). 53% of South Coatesville’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
Whether an eave membrane is a code item depends on the climate table the municipality filled in when it adopted the code (IRC R905.1.2, Table R301.2). The contractor or the borough code office in South Coatesville will know.
Checked against the code text on October 24, 2026. Everything else the state requires: roof replacement in Pennsylvania.
Of 715 occupied homes in South Coatesville, 431 (60%) are owner-occupied. Counting by decade, 26% before 1940, 39% before 1960, 53% before 1980 of the housing was in place, and 36% dates from 2000 on. (ACS 2020–2024.)
The housing is 33% detached houses, 45% attached single-family houses (rowhouses, twins and townhouses), 14% buildings of two to four units.
With 45% 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.
36% of homes here were built in 2000 or later. HUD’s useful-life table gives an asphalt-shingle roof 20 years, so roofs on houses from the early 2000s are reaching that age.
Of the 71 Chester County municipalities on this site, South Coatesville has the 21st largest share of homes built before 1980: 53%, against a county range of 12% to 80%.
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| South Coatesville | 1970 | 53% | 60% | 45% | 10 |
| Coatesville | 1952 | 68% | 40% | 45% | 11 |
| East Fallowfield | 1999 | 39% | 90% | 9% | 11 |
| Valley Township, Chester County | 1990 | 39% | 84% | 38% | 9 |
| Caln | 1981 | 48% | 70% | 25% | 14 |
| West Brandywine | 1989 | 34% | 96% | 1% | 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.
NOAA’s storm reports show 10 days since 2006 with hail of at least 1 inch inside a 10-mile circle around South Coatesville, topping out at 1.5 in on April 24, 2006. The most recent was September 7, 2023.
At the county level, South Coatesville 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.
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; 33% 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 | Roofs that will carry solar later | A complete standing-seam system may go over the old roof (R908.3.1) |
| Slate | 75 years | Older houses; 26% here predate 1940 | Sound slate can be reused (R908.5); broken slate cannot |
| Flat roof: EPDM or TPO | 15 years | Low-slope roofs and rear sections (45% 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 South Coatesville and look it up.
Contracts, deposits and the right to cancel: checking a roofing contractor. What moves the price: new roof cost in Pennsylvania.
South Coatesville’s ordinance decides. Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). Whether South Coatesville 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). 53% of South Coatesville’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 South Coatesville was built in 1970, 53% of homes were built before 1980, 60% are owner-occupied.
Hail of 1 inch or larger was reported on 10 days within 10 miles of South Coatesville 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 South Coatesville 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.