Roof Replacement in Pennsylvania: Code, Permits and Who May Do the Work

What part of Pennsylvania this site covers

Eastern and central Pennsylvania: Philadelphia and its suburbs, the Lehigh Valley, Berks, Lancaster, York and Harrisburg, the Poconos and the Scranton and Wilkes-Barre area, and the central counties. Pittsburgh and Erie are not on this site. A municipality gets a page when more than half of its land lies in the ZIP codes the site serves and it has at least 1,000 residents.

Which code applies

Pennsylvania’s Uniform Construction Code uses the 2021 International Residential Code for one- and two-family homes, in force since January 1, 2026.

Layers: when the old roof has to come off

A new roof may go over one existing layer only. Where the roof already has two or more layers, where the old covering is slate, clay or cement tile, or where it is water-soaked or deteriorated, everything comes off to the deck first. (IRC R908.3.1.1, part of the 2021 code Pennsylvania adopted.)

Ice barrier

The code requires an eave ice barrier where the local climate table (Table R301.2) says so, and in Pennsylvania each municipality fills in that table when it adopts the code. Ask your township or borough code office, or the contractor, whether the table marks your area “yes.”

Contractor and contract

Home improvement contractors with $5,000 or more of such work a year must register with the Attorney General, and the registration number has to appear on every contract and estimate (HICPA § 3, § 6). Search it before you sign.

You can cancel a home improvement contract within three business days of signing, wherever it was signed (HICPA § 7(b)). On a job over $5,000 the deposit can’t exceed one-third of the price plus the cost of special-order materials (HICPA § 9).

In Philadelphia a contractor working on an existing one- or two-family house also needs the City’s “PA Home Improvement” registration on top of the state one; 555 were active on October 22, 2026 (OpenDataPhilly, trade licenses).

How the six states compare: checking a roofing contractor. Reading the paperwork: the estimate and the contract.

What a new roof costs in Pennsylvania

No public source gives a statewide price, and a price no source backs is not printed here. What changes the number in Pennsylvania, line by line: new roof cost in Pennsylvania.