Roofing in Delaware Township (Mercer County), Pennsylvania

Required

The 2021 International Residential Code, as adopted by the State in the Pennsylvania Uniform Construction Code (UCC). 34 Pa. Code 403.21(a)(7) adopts "The 'International Residential Code of 2021,' except that:" followed by the State's list of exclusions and modifications, effective January 1, 2026 (55 Pa.B. 7701). None of the State's changes touches Chapter 9, Roof Assemblies, or Section R803, Roof Sheathing, so those apply as the International Code Council publishes them. Work on existing buildings is also pointed to the State's existing-building code: "The repair, alteration, change of occupancy, addition and relocation of existing buildings must comply with Chapter 34 of the 'International Building Code of 2021' or with the 'International Existing Building Code of 2021'" (34 Pa. Code 403.21(f)). The UCC is the minimum everywhere in the state: "no municipality may propose or enact any ordinance which is less than the minimum requirement of the Uniform Construction Code" (Pennsylvania Construction Code Act, Act 45 of 1999, section 503(b)). The Act also lists work it "shall not apply to", including "Alterations to residential buildings which do not make structural changes or changes to means of egress" or to "Repairs to residential buildings," in each case "except as might be required by ordinances" kept in force under section 303(b)(1) or adopted under section 503 (Act 45 section 104(b)(5) and (6); 34 Pa. Code 403.1(b)(8) and (9)). The Act defines a repair as "The reconstruction or renewal of any part of an existing building for the purpose of its maintenance." So whether the code's roofing rules reach a given house reroof depends on the municipality's own ordinances. Everything above is Pennsylvania state law, the same in every municipality. Locally, Delaware Township does not issue permits for work on a house itself: its Building Permit Information page says "Any buildings/additions attached to a residential structure and/or 1000 square feet ( including swimming pools ) please contact one the agencies below," and lists three retained code agencies, one of them the Middle Department Inspection Agency (MDIA) at 724-814-6502. The Township's own application is for "any construction 1000 square feet or less that is not attached to a residential structure." Its Ordinance 06-04 (June 29, 2004) says "Delaware Township, Mercer County, hereby elects to administer and enforce the provisions of the Pennsylvania construction Code Act," and Ordinance 08-04 joins it to the Tri-County Association for Appeals, whose parties "have elected to administer and enforce" that Act. Ordinance 06-04 adopts "The Uniform Construction Code, contained in 34 Pa. Code, Chapters 401-405, as amended from time to time" as the municipal building code and keeps in force building code ordinances "adopted by this Municipality" on or before July 1, 1999 that equal or exceed the code (Section 5a); it names no roof work and adds no permit clause of its own for house repairs. Ordinance 06-04 adopts the Uniform Construction Code "as amended from time to time" and names no code edition, and the Township's pages name none; this record does not decide which edition the agencies apply.

Delaware Township's pages and ordinances read for this record do not say whether a house reroof needs a permit. Ordinance 06-04 adopts "The Uniform Construction Code, contained in 34 Pa. Code, Chapters 401-405, as amended from time to time" as the municipal building code and keeps in force building code ordinances "adopted by this Municipality" on or before July 1, 1999 that equal or exceed the code (Section 5a); it names no roof work and adds no permit clause of its own for house repairs. Neither the Township's pages nor the application forms and guides they link say whether a house reroof needs a permit. Under state law, Act 45 section 104(b)(5) and (6) list "Alterations to residential buildings which do not make structural changes or changes to means of egress" and "Repairs to residential buildings" among work the Act does not apply to, "except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503," and 34 Pa. Code 403.62(c) says "A permit is not required for the exceptions listed in § 403.1(b) (relating to scope) and the following, if the work does not violate a law or ordinance." This record does not state whether a permit is required for a house reroof; ask the Township office (724-588-2040) or one of the listed code agencies before starting. The Township's 2023 newsletter shows office hours of Monday and Friday, 9:00 a.m. to 12:00 p.m., and Tuesday to Thursday, 9:00 a.m. to 3:00 p.m. Read for this answer, October 12, 2026: the Township's Building Permit Information/Forms page; its Ordinances pages (all three), which list Ordinance 06-04 and Ordinance 08-04 as the construction code ordinances and no ordinance naming roofing, reroofing or roof replacement; Ordinances 06-04 and 08-04 in full; the Township's Flood Plain Management ordinance (6-2014), in full, whose Section 3.02 says "A Permit shall be required before any construction or development is undertaken within any area of the Township of Delaware" and whose Section 2.02B says "A Permit shall not be required for minor repairs to existing buildings or structures"; it sits in a flood plain ordinance, names no roof work, and this record does not decide whether a house reroof is "development" under it; the Township's building permit application; the Township's 2023 newsletter; and the agency application forms and guides the Forms page links, none of which names a reroof as permit work or as exempt. A name search of ecode360 found no Township code; the Township's own ordinance pages are the only code text found.