The median home in South Londonderry was built in 2000; there are 3,487 of them. 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 Londonderry wants a permit is in its own ordinance; ask the township code office before the old roof comes off.
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. 31% of South Londonderry’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
IRC R905.1.2 calls for an ice barrier where Table R301.2 says so; in Pennsylvania the municipality completes that table. South Londonderry’s answer is with the township code office.
Rules as read on October 24, 2026. Everything else the state requires: roof replacement in Pennsylvania.
Owners live in 2,468 of South Londonderry’s occupied homes, or 76%. By year built, 11% before 1940, 16% before 1960, 31% before 1980; 51% went up in 2000 or later. (ACS 2020–2024.)
By building type: 55% detached houses, 24% attached single-family houses (rowhouses, twins and townhouses), 7% buildings of two to four units, 6% manufactured homes.
51% 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 23 Lebanon County municipalities on this site, South Londonderry has the smallest share of homes built before 1980: 31%, against a county range of 31% to 88%.
ZIP codes: 17010 · 17041 · 17064 · 17078
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| South Londonderry | 2000 | 31% | 76% | 24% | 17 |
| South Annville | 1978 | 57% | 91% | 3% | 17 |
| Conewago Township, Dauphin County | 1978 | 54% | 89% | 6% | 18 |
| Mount Joy Township, Lancaster County | 1991 | 34% | 73% | 16% | 19 |
| West Cornwall | 1977 | 54% | 91% | 12% | 16 |
| Palmyra Borough | 1957 | 83% | 58% | 19% | 17 |
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 17 separate days within 10 miles of South Londonderry; the largest was 1.75 in on March 29, 2009. The most recent was June 26, 2023.
That is more hail days than 79% of the places in the state on this site.
Severe Winter Storm and Snowstorm (DR-4267, March 2016) is the latest of 3 federal storm declarations covering Lebanon County since 2006. (OpenFEMA.)
A report says hail fell near South Londonderry, 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; 55% 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; 11% 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 (24% 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 South Londonderry and look it up.
The price side is in what a new roof costs in Pennsylvania; the paperwork side in checking a roofing contractor.
South Londonderry’s ordinance decides. Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). Whether South Londonderry wants a permit is in its own ordinance; ask the township code office before the old roof comes off.
IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. 31% of South Londonderry’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 Londonderry was built in 2000, 31% of homes were built before 1980, 76% are owner-occupied.
Hail of 1 inch or larger was reported on 17 days within 10 miles of South Londonderry 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 Londonderry 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.