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Permitting Authorities / Denver Borough - Construction Code Permits

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

Adopted code

Denver Borough - Construction Code Permits

Yes, a permit is required to replace a roof in Borough of Denver, PA, issued by Denver Borough - Construction Code Permits. Denver Borough's information sheet lists replacement of roofing materials as permit work, and its code exempts only re-roofing of less than 25% of the roof. The Borough's Construction Code and Zoning Permit Applications information sheet (read October 9, 2026) says "A Construction Code permit shall be required for all new construction but not limited to the following:" and lists "18. Replacement of roofing materials; including underlayment, rafter repair, etc." Section 94-4H(4)(c) of the Borough Code (added by Ord. No. 549, February 28, 2005, and amended by Ord. No. 602, October 31, 2011) requires permits for "All alterations or repairs to residential buildings which are exempt from the UCC by Act 92 of 2004," except nine listed kinds of work that "shall continue to be exempt and no permit will be required," the second of which is "Re-roofing of less than 25% of the total existing roof square footage." A full reroof is above that line. Under state law, Act 45 says the Act "shall not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" or to "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(5) and (6)), and of a municipal ordinance that adds to the code, section 503(c) says "An ordinance under this subsection shall not be effective nor enforceable unless subsections (d), (e), (f), (g), (h) and (i) have been satisfied." This record does not decide whether the municipality's requirement is one adopted under section 503 or kept in effect by section 303(b)(1). In practice, expect the Borough to require a Construction Code permit for a reroof, and its information sheet lists replacement of roofing materials without a size limit. Section 94-4J says anyone who "commences any work on a building, structure, electrical, gas, mechanical or plumbing system before obtaining the necessary Construction Code permits shall be subject to an additional fee for expedited processing which shall be equal to the fee which should have been paid at permit application," and Section 94-4O sets a penalty of "not less than $200 and not more than $1,000" for a violation. To apply, the Borough's permit process says the applicant first submits a signed Zoning Permit Application to the Municipal Building, then chooses one approved agency for plan review, and "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant"; the information sheet says residents unsure whether a permit is needed may contact the Municipal Building at 717-336-2831. The Borough office is open Monday to Friday, 8 a.m. to 5 p.m. Read for this answer: Chapter 94 of the Borough Code, Construction Codes, Uniform (Sections 94-1 to 94-5), in full; every page of a search of the whole Borough Code for "roof" and for "reroofing"; Chapter A205, Fees, which says the fee schedule is adopted by resolution and kept at the Borough offices (it is not published online and was not read); and the Borough's Departments and Forms pages, its Construction Code and Zoning Permit Applications information sheet and its Construction Code Permit Process and application.

Roof code checklist: Borough of Denver, PA

ItemAnswerCode citeSourceVerified
Permit to replace a roofYesaptg.co2026-10-09
Repair permit thresholdPublishedpacodeandbulletin.gov2026-10-09
Layer limit / roof-overPublishedR908.3.1.1pacodeandbulletin.gov2026-10-09
Deck & sheathingPublishedR905.2.1pacodeandbulletin.gov2026-10-09
Drip edgeNot published
Ice & water shieldNot published
Mid-roof inspectionNot published
Impact-resistant (Class 4) roofingNot published
Wind design criteriaNot published
Adopted codePublishedSec. 94-3pacodeandbulletin.gov2026-10-09
Contractor license / registrationYespalegis.us2026-10-09
Sales & use taxPublishedpa.gov2026-10-09

Each row comes from the sourced record on this page; full wording is in the table below. "Not published" means no official source for that item was found when the record was last verified.

Jurisdiction
Borough of Denver, Pennsylvania
Jurisdiction type
city
Address
501 Main Street, Denver, PA 17517
Contact
  • url: https://www.denverboro.net/o/bod/page/departments
  • phone: 717-336-2831
Roofing permit required
Required
Contractor registration required
Required
Permit process note
Denver Borough's information sheet lists replacement of roofing materials as permit work, and its code exempts only re-roofing of less than 25% of the roof. The Borough's Construction Code and Zoning Permit Applications information sheet (read October 9, 2026) says "A Construction Code permit shall be required for all new construction but not limited to the following:" and lists "18. Replacement of roofing materials; including underlayment, rafter repair, etc." Section 94-4H(4)(c) of the Borough Code (added by Ord. No. 549, February 28, 2005, and amended by Ord. No. 602, October 31, 2011) requires permits for "All alterations or repairs to residential buildings which are exempt from the UCC by Act 92 of 2004," except nine listed kinds of work that "shall continue to be exempt and no permit will be required," the second of which is "Re-roofing of less than 25% of the total existing roof square footage." A full reroof is above that line. Under state law, Act 45 says the Act "shall not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" or to "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(5) and (6)), and of a municipal ordinance that adds to the code, section 503(c) says "An ordinance under this subsection shall not be effective nor enforceable unless subsections (d), (e), (f), (g), (h) and (i) have been satisfied." This record does not decide whether the municipality's requirement is one adopted under section 503 or kept in effect by section 303(b)(1). In practice, expect the Borough to require a Construction Code permit for a reroof, and its information sheet lists replacement of roofing materials without a size limit. Section 94-4J says anyone who "commences any work on a building, structure, electrical, gas, mechanical or plumbing system before obtaining the necessary Construction Code permits shall be subject to an additional fee for expedited processing which shall be equal to the fee which should have been paid at permit application," and Section 94-4O sets a penalty of "not less than $200 and not more than $1,000" for a violation. To apply, the Borough's permit process says the applicant first submits a signed Zoning Permit Application to the Municipal Building, then chooses one approved agency for plan review, and "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant"; the information sheet says residents unsure whether a permit is needed may contact the Municipal Building at 717-336-2831. The Borough office is open Monday to Friday, 8 a.m. to 5 p.m. Read for this answer: Chapter 94 of the Borough Code, Construction Codes, Uniform (Sections 94-1 to 94-5), in full; every page of a search of the whole Borough Code for "roof" and for "reroofing"; Chapter A205, Fees, which says the fee schedule is adopted by resolution and kept at the Borough offices (it is not published online and was not read); and the Borough's Departments and Forms pages, its Construction Code and Zoning Permit Applications information sheet and its Construction Code Permit Process and application.
Adopted code
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, Denver Borough in Lancaster County issues Construction Code permits from its Municipal Building at 501 Main Street: the Borough's December 2025 Construction Code Permit Process says "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant," after plan review by one of four third-party agencies the Borough has approved as "construction plan review and inspection agencies for the Borough's Uniform Construction Code" (Associated Building Inspections LLC, Commonwealth Code Inspection Service, Inc., Building Inspection Underwriters of PA, and Contractors Inspection Services, LTD), whose fees "are billed directly to the applicant." Section 94-3 adopts the standards the Department of Labor and Industry has adopted as the Uniform Construction Code as the Denver Borough Construction Code, and Chapter 94 changes nothing in the code's roofing provisions. Chapter 94 adopts the Uniform Construction Code "as such regulations and standard codes adopted by such regulations may be amended from time to time," amends "the International Building Code/2006 or such future edition of the International Building Code as may be adopted from time to time," and completes "Table R301.2(1) of the International Residential Code/2003," including "Ice shield underlayment required: Yes"; the Borough's permit pages name no edition; this record has not read the 2003 or 2006 edition's text and does not decide which edition the Borough applies.
Repair permit threshold
Denver Borough's information sheet lists replacement of roofing materials as permit work, and its code exempts only re-roofing of less than 25% of the roof. The Borough's Construction Code and Zoning Permit Applications information sheet (read October 9, 2026) says "A Construction Code permit shall be required for all new construction but not limited to the following:" and lists "18. Replacement of roofing materials; including underlayment, rafter repair, etc." Section 94-4H(4)(c) of the Borough Code (added by Ord. No. 549, February 28, 2005, and amended by Ord. No. 602, October 31, 2011) requires permits for "All alterations or repairs to residential buildings which are exempt from the UCC by Act 92 of 2004," except nine listed kinds of work that "shall continue to be exempt and no permit will be required," the second of which is "Re-roofing of less than 25% of the total existing roof square footage." A full reroof is above that line. Under state law, Act 45 says the Act "shall not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" or to "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(5) and (6)), and of a municipal ordinance that adds to the code, section 503(c) says "An ordinance under this subsection shall not be effective nor enforceable unless subsections (d), (e), (f), (g), (h) and (i) have been satisfied." This record does not decide whether the municipality's requirement is one adopted under section 503 or kept in effect by section 303(b)(1). In practice, expect the Borough to require a Construction Code permit for a reroof, and its information sheet lists replacement of roofing materials without a size limit. Section 94-4J says anyone who "commences any work on a building, structure, electrical, gas, mechanical or plumbing system before obtaining the necessary Construction Code permits shall be subject to an additional fee for expedited processing which shall be equal to the fee which should have been paid at permit application," and Section 94-4O sets a penalty of "not less than $200 and not more than $1,000" for a violation. 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, Denver Borough in Lancaster County issues Construction Code permits from its Municipal Building at 501 Main Street: the Borough's December 2025 Construction Code Permit Process says "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant," after plan review by one of four third-party agencies the Borough has approved as "construction plan review and inspection agencies for the Borough's Uniform Construction Code" (Associated Building Inspections LLC, Commonwealth Code Inspection Service, Inc., Building Inspection Underwriters of PA, and Contractors Inspection Services, LTD), whose fees "are billed directly to the applicant." Its enacted threshold is the one in Section 94-4H(4)(c)[2] quoted at the start: re-roofing of less than 25% of the total existing roof square footage needs no permit, and a larger reroof does; the information sheet's roofing line names no size limit.
Roof layer limit / recover
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, Denver Borough in Lancaster County issues Construction Code permits from its Municipal Building at 501 Main Street: the Borough's December 2025 Construction Code Permit Process says "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant," after plan review by one of four third-party agencies the Borough has approved as "construction plan review and inspection agencies for the Borough's Uniform Construction Code" (Associated Building Inspections LLC, Commonwealth Code Inspection Service, Inc., Building Inspection Underwriters of PA, and Contractors Inspection Services, LTD), whose fees "are billed directly to the applicant." Chapter 94 of the Borough Code changes nothing in the code's reroofing provisions, and the Borough's pages say nothing on roof layers. Chapter 94 adopts the Uniform Construction Code "as such regulations and standard codes adopted by such regulations may be amended from time to time," amends "the International Building Code/2006 or such future edition of the International Building Code as may be adopted from time to time," and completes "Table R301.2(1) of the International Residential Code/2003," including "Ice shield underlayment required: Yes"; the Borough's permit pages name no edition; the text above is the 2021 edition's, the 2003 edition's reroofing text was not read for this record, and this record does not decide which edition the Borough applies.
Deck & sheathing requirements
State rules from the base code, where the state code reaches the job. Pennsylvania adopts the 2021 International Residential Code without changing Section R803, Roof Sheathing (34 Pa. Code 403.21(a)(7); the State's changes to Chapter 8 are to ridge framing and attic ventilation). Lumber roof sheathing follows Table R803.1: over rafters or beams 24 inches apart it must be at least 5/8 inch net thick. Wood structural panels "shall be identified for grade, bond classification and performance category by a grade mark or certificate of inspection issued by an approved agency," and their spans "shall not exceed the values set forth in Table R503.2.1.1(1) or APA E30." For shingles, "Asphalt shingles shall be fastened to solidly sheathed decks" (R905.2.1), and on any reroof "The structural roof components shall be capable of supporting the roof covering system and the material and equipment loads that will be encountered during installation of the roof covering system" (R908.2). 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)). Act 45 section 104(b)(5) excludes alterations "which do not make structural changes or changes to means of egress" and says only that "a structural change does not include a minor framing change needed to replace existing windows or doors"; 34 Pa. Code 403.62(d)(2) lists "The removal or cutting of any structural beam or load-bearing support" as not an ordinary repair. Neither names roof sheathing; this record does not decide whether replacing it is either. Everything above is Pennsylvania state law, the same in every municipality. Locally, Denver Borough in Lancaster County issues Construction Code permits from its Municipal Building at 501 Main Street: the Borough's December 2025 Construction Code Permit Process says "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant," after plan review by one of four third-party agencies the Borough has approved as "construction plan review and inspection agencies for the Borough's Uniform Construction Code" (Associated Building Inspections LLC, Commonwealth Code Inspection Service, Inc., Building Inspection Underwriters of PA, and Contractors Inspection Services, LTD), whose fees "are billed directly to the applicant." Chapter 94 of the Borough Code changes nothing in the code's roof sheathing provisions; the Borough's information sheet lists replacement of roofing materials "including underlayment, rafter repair, etc." as permit work and draws no separate line for sheathing. Chapter 94 adopts the Uniform Construction Code "as such regulations and standard codes adopted by such regulations may be amended from time to time," amends "the International Building Code/2006 or such future edition of the International Building Code as may be adopted from time to time," and completes "Table R301.2(1) of the International Residential Code/2003," including "Ice shield underlayment required: Yes"; the Borough's permit pages name no edition; the text above is the 2021 edition's, the 2003 edition's sheathing text was not read for this record, and this record does not decide which edition the Borough applies.
Sales & use tax
6% Pennsylvania sales and use tax, with a local tax added on purchases made in Allegheny County (1%) and Philadelphia (2%). On a reroof the roofer pays the tax on the materials and does not add it to the homeowner's bill. The Department of Revenue says: "The Pennsylvania sales tax rate is 6 percent. By law, a 1 percent local tax is added to purchases made in Allegheny County, and 2 percent local tax is added to purchases made in Philadelphia." Roof work is a construction activity: the rule's list of items "presumed to become a permanent part of real estate" includes "Roofing (repairs)" (61 Pa. Code 31.11). For construction activities, "A contractor shall pay tax upon the purchase price ... of all property, including materials, equipment, components and supplies, which he furnishes and installs" (61 Pa. Code 31.12(a)(1)), and the rule's example says the contractor "does not charge sales tax on this transaction to his customer. The contractor may include the tax he must pay in his bid proposal but not as a separately stated item." Apart from limited exceptions set out in the rule, the same holds on jobs for tax-exempt owners: "a contractor erecting a building, repairing a roof, replacing a door for a governmental agency, ... school district, charitable or religious organization, and the like, shall pay tax upon the property which he consumes" (61 Pa. Code 31.13(a)). Everything above is Pennsylvania state law, the same in every municipality. Denver Borough is in Lancaster County. The Borough's permit pages say nothing on sales tax.

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Denver Borough in Lancaster County issues Construction Code permits from its Municipal Building at 501 Main Street, with plan review and inspections by one of four third-party agencies it has approved, and its information sheet lists replacement of roofing materials as work needing a permit. The Pennsylvania Uniform Construction Code applies statewide, but Act 45 section 104(b) lists "Repairs to residential buildings" and alterations that make no structural or egress change among work it 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."

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Roofing questions: Borough of Denver, PA

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

Yes, a permit is required to replace a roof in Borough of Denver, PA. Denver Borough's information sheet lists replacement of roofing materials as permit work, and its code exempts only re-roofing of less than 25% of the roof. The Borough's Construction Code and Zoning Permit Applications information sheet (read October 9, 2026) says "A Construction Code permit shall be required for all new construction but not limited to the following:" and lists "18. Replacement of roofing materials; including underlayment, rafter repair, etc." Section 94-4H(4)(c) of the Borough Code (added by Ord. No. 549, February 28, 2005, and amended by Ord. No. 602, October 31, 2011) requires permits for "All alterations or repairs to residential buildings which are exempt from the UCC by Act 92 of 2004," except nine listed kinds of work that "shall continue to be exempt and no permit will be required," the second of which is "Re-roofing of less than 25% of the total existing roof square footage." A full reroof is above that line. Under state law, Act 45 says the Act "shall not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" or to "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(5) and (6)), and of a municipal ordinance that adds to the code, section 503(c) says "An ordinance under this subsection shall not be effective nor enforceable unless subsections (d), (e), (f), (g), (h) and (i) have been satisfied." This record does not decide whether the municipality's requirement is one adopted under section 503 or kept in effect by section 303(b)(1). In practice, expect the Borough to require a Construction Code permit for a reroof, and its information sheet lists replacement of roofing materials without a size limit. Section 94-4J says anyone who "commences any work on a building, structure, electrical, gas, mechanical or plumbing system before obtaining the necessary Construction Code permits shall be subject to an additional fee for expedited processing which shall be equal to the fee which should have been paid at permit application," and Section 94-4O sets a penalty of "not less than $200 and not more than $1,000" for a violation. 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, Denver Borough in Lancaster County issues Construction Code permits from its Municipal Building at 501 Main Street: the Borough's December 2025 Construction Code Permit Process says "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant," after plan review by one of four third-party agencies the Borough has approved as "construction plan review and inspection agencies for the Borough's Uniform Construction Code" (Associated Building Inspections LLC, Commonwealth Code Inspection Service, Inc., Building Inspection Underwriters of PA, and Contractors Inspection Services, LTD), whose fees "are billed directly to the applicant." Its enacted threshold is the one in Section 94-4H(4)(c)[2] quoted at the start: re-roofing of less than 25% of the total existing roof square footage needs no permit, and a larger reroof does; the information sheet's roofing line names no size limit.

Can you roof over an existing roof in Borough of Denver, 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, Denver Borough in Lancaster County issues Construction Code permits from its Municipal Building at 501 Main Street: the Borough's December 2025 Construction Code Permit Process says "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant," after plan review by one of four third-party agencies the Borough has approved as "construction plan review and inspection agencies for the Borough's Uniform Construction Code" (Associated Building Inspections LLC, Commonwealth Code Inspection Service, Inc., Building Inspection Underwriters of PA, and Contractors Inspection Services, LTD), whose fees "are billed directly to the applicant." Chapter 94 of the Borough Code changes nothing in the code's reroofing provisions, and the Borough's pages say nothing on roof layers. Chapter 94 adopts the Uniform Construction Code "as such regulations and standard codes adopted by such regulations may be amended from time to time," amends "the International Building Code/2006 or such future edition of the International Building Code as may be adopted from time to time," and completes "Table R301.2(1) of the International Residential Code/2003," including "Ice shield underlayment required: Yes"; the Borough's permit pages name no edition; the text above is the 2021 edition's, the 2003 edition's reroofing text was not read for this record, and this record does not decide which edition the Borough applies.

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

Yes.

What building code does Borough of Denver, 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, Denver Borough in Lancaster County issues Construction Code permits from its Municipal Building at 501 Main Street: the Borough's December 2025 Construction Code Permit Process says "The Zoning Officer/Building Code Official shall issue a Construction Code Permit to the applicant," after plan review by one of four third-party agencies the Borough has approved as "construction plan review and inspection agencies for the Borough's Uniform Construction Code" (Associated Building Inspections LLC, Commonwealth Code Inspection Service, Inc., Building Inspection Underwriters of PA, and Contractors Inspection Services, LTD), whose fees "are billed directly to the applicant." Section 94-3 adopts the standards the Department of Labor and Industry has adopted as the Uniform Construction Code as the Denver Borough Construction Code, and Chapter 94 changes nothing in the code's roofing provisions. Chapter 94 adopts the Uniform Construction Code "as such regulations and standard codes adopted by such regulations may be amended from time to time," amends "the International Building Code/2006 or such future edition of the International Building Code as may be adopted from time to time," and completes "Table R301.2(1) of the International Residential Code/2003," including "Ice shield underlayment required: Yes"; the Borough's permit pages name no edition; this record has not read the 2003 or 2006 edition's text and does not decide which edition the Borough applies.