Do you need a permit to replace a roof in Borough of West Mifflin, PA?

Roofing questions: Borough of West Mifflin, PA

Do you need a permit to replace a roof in Borough of West Mifflin, PA?

No, Borough of West Mifflin, PA does not require a permit to replace a roof. West Mifflin Borough's Community Development department says a building permit is not required for a residential roof replacement if only the shingles are replaced; the Borough's floodplain ordinance has a permit of its own, which is not required for minor repairs. The department's Application for Small Projects (read October 7, 2026), under PERMIT REQUIREMENTS, says "RESIDENTIAL ROOF REPLACEMENT: Building permit is not required if only the shingles are replaced." The same list requires a building permit for decks, foundation repair, gazebos, steps and storage sheds; its answer names shingles and does not speak to other roof coverings or to replacing roof sheathing. Chapter 100 of the Borough Code, the Borough's Uniform Construction Code ordinance, names no roof work either way: for residential permits it adopts the State's own permit section, 34 Pa. Code 403.62, adding only that the owner and contractor must make sure any required permit is obtained and posted, and it has no clause of its own on house repairs. The Borough's 2026 Fee Schedule prices building permits for "New Construction, Addition(s), Garages, Swimming Pools, Decks, Patios, Porches, Electrical" by value of construction and has no roofing line; Chapter 116 keeps the fee schedule "on file in the office of the Borough Manager." Chapter 135, Flood Damage Prevention, the Borough's floodplain ordinance, has a permit of its own from the Borough's Floodplain Administrator: "A permit shall be required before any construction or development is undertaken within any area of the Borough of West Mifflin," and "A permit shall not be required for minor repairs to existing buildings or structures." The enacted text names no roof work either way; the no-permit line is the department's stated practice, and this record does not decide whether it is the department's reading of the State's exclusion for house repairs. 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." State law sets no square-footage or percentage threshold for roof work; any threshold is set locally. The Uniform Construction Code "does not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as required by ordinances in effect under sections 303(b)(1) or 503 of the act" or to "Repairs to residential buildings, except as required by ordinances in effect under sections 303(b)(1) and 503 of the act" (34 Pa. Code 403.1(b)(8) and (9)), and "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" (34 Pa. Code 403.62(c)). For houses the regulation adds: "An ordinary repair does not require a permit." Its list of work that is not an ordinary repair names cutting away a load-bearing wall, "The removal or cutting of any structural beam or load-bearing support," changes to a required means of egress, and new or relocated piping, wiring or mechanical work (34 Pa. Code 403.62(d)); roofing is not named. A municipality may require more: under Act 45 section 503(c) it "may enact ordinances pursuant to this section which adopt additional code requirements for alterations or repairs to residential buildings," after a public hearing and after filing the proposed ordinance with the Department of Labor and Industry. These rules concern a "Residential building," which the regulation defines as "Detached one-family and two-family dwellings and townhouses which are not more than three stories above grade plane in height with a separate means of egress and their accessory structures" (34 Pa. Code 401.1). Everything above is Pennsylvania state law, the same in every municipality. Locally, West Mifflin Borough administers the code itself through its Community Development department, at 1020 Lebanon Road: the department's page says "It is through this department that permits for building construction and renovation, occupancy, grading, and signs are submitted, reviewed, and approved," and Chapter 100 of the Borough Code gives the Borough's Building Code Official and Construction Code Official the issuing of permits. The Borough sends commercial plans to Middle Department Inspection Agency for review, and plumbing is administered by the Allegheny County Health Department. The department's no-permit line, quoted at the start, holds "if only the shingles are replaced"; no Borough text sets an area or cost threshold for roof work.

Can you roof over an existing roof in Borough of West Mifflin, PA?

Two layers at most where the state code reaches the job. Pennsylvania adopts the 2021 International Residential Code without changing its reroofing section, R908 (34 Pa. Code 403.21(a)(7); the State's list of changes names no Chapter 9 section). Section R908.3.1.1 says "A roof recover shall not be permitted where any of the following conditions occur," and the third condition is "Where the existing roof has two or more applications of any type of roof covering." So one existing layer may be covered once, and a roof that already has two layers is torn off to the deck. The same section also bars a recover "Where the existing roof or roof covering is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing" and "Where the existing roof covering is slate, clay, cement or asbestos-cement tile." The existing-building code the State also adopts, the 2021 International Existing Building Code (34 Pa. Code 403.21(f)), carries the same three conditions in Section 705.2.1.1. These rules bind work the Uniform Construction Code reaches. The Act does not apply to "Repairs to residential buildings" or to alterations that make no structural change, "except as might be required by ordinances" (Act 45 section 104(b)(5) and (6)), so whether R908 binds a particular house reroof turns on that exclusion and on the municipality's own ordinances. Everything above is Pennsylvania state law, the same in every municipality. Locally, West Mifflin Borough administers the code itself through its Community Development department, at 1020 Lebanon Road: the department's page says "It is through this department that permits for building construction and renovation, occupancy, grading, and signs are submitted, reviewed, and approved," and Chapter 100 of the Borough Code gives the Borough's Building Code Official and Construction Code Official the issuing of permits. The Borough sends commercial plans to Middle Department Inspection Agency for review, and plumbing is administered by the Allegheny County Health Department. Chapter 100 of the Borough Code changes nothing in the code's reroofing provisions, and the department says a building permit is not required for a residential roof replacement if only the shingles are replaced; its pages say nothing on roof layers. Chapter 100 of the Borough Code adopts "the International Residential Code/2006" and the other 2006 codes as the building codes of the Borough, the department's Application for Residential Permit says "the International Residential Code 2006 Edition will apply," and its Application for Small Projects says "For all detached single family accessory structures, the International Residential Code 2018 Edition apply"; the text above is the 2021 edition's, and the 2006 and 2018 editions' reroofing text was not read for this record.

Do roofing contractors need a license or registration in Borough of West Mifflin, PA?

Yes.

What building code does Borough of West Mifflin, PA use?

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, West Mifflin Borough administers the code itself through its Community Development department, at 1020 Lebanon Road: the department's page says "It is through this department that permits for building construction and renovation, occupancy, grading, and signs are submitted, reviewed, and approved," and Chapter 100 of the Borough Code gives the Borough's Building Code Official and Construction Code Official the issuing of permits. The Borough sends commercial plans to Middle Department Inspection Agency for review, and plumbing is administered by the Allegheny County Health Department. Section 100-5 of the Borough Code fills in Table R301.2(1) of the 2006 International Residential Code, including "Ground snow load: 30 pounds per square foot" and "Ice shield underlayment required: yes," and Chapter 100 changes nothing in the code's roofing provisions. Chapter 100 of the Borough Code adopts "the International Residential Code/2006" and the other 2006 codes as the building codes of the Borough, the department's Application for Residential Permit says "the International Residential Code 2006 Edition will apply," and its Application for Small Projects says "For all detached single family accessory structures, the International Residential Code 2018 Edition apply"; this record has not read the 2006 or 2018 edition's text and does not decide which edition the Borough applies.