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Permitting Authorities / Township of Thetford - Building Department

Do you need a permit to replace a roof in Township of Thetford, MI?

Adopted code

Township of Thetford - Building Department

Yes, a permit is required to replace a roof in Township of Thetford, MI, issued by Township of Thetford - Building Department. Thetford Township's Fee Schedule, read October 11, 2026, lists "Roofing" as its own line under Miscellaneous Building Department Fees, priced "Based on value of construction + insp.", with inspections at $75.00, a re-inspection if work is not complete at $75.00 and work started before a permit is issued at double the fee. The Building page lists a building official and zoning administrator, a building inspector and a building assistant at (810) 686-5200 and says "Thetford Township contracts with VIENNA TOWNSHIP for Mechanical, Electrical and Plumbing permit issuance and inspection services." Vienna Township's line is (810) 686-7676, at 3400 West Vienna Road in Clio. The township's Building Permit Application says "INCOMPLETE APPLICATION WILL NOT BE PROCESSED", says "SEPARATE APPLICATIONS MUST BE COMPLETED FOR PLUMBING, MECHANICAL, AND ELECTRICAL WORK PERMITS" and notes "All trades are pulled through Vienna Township". The township office is open Monday through Thursday, 8 a.m. to 5 p.m. The pages name no online permit portal.

Roof code checklist: Township of Thetford, MI

ItemAnswerCode citeSourceVerified
Permit to replace a roofYesthetfordtwpmi.gov2026-10-11
Repair permit thresholdPublishedthetfordtwpmi.gov2026-10-11
Layer limit / roof-overPublishedR908.3.1.1codes.iccsafe.org2026-10-11
Deck & sheathingPublishedR905.2.1codes.iccsafe.org2026-10-11
Drip edgeYesR905.2.8.5codes.iccsafe.org2026-10-11
Ice & water shieldYesR905.1.2ars.apps.lara.state.mi.us2026-10-11
Mid-roof inspectionNot published
Impact-resistant (Class 4) roofingNoars.apps.lara.state.mi.us2026-10-11
Wind design criteriaNot published
Adopted codePublishedars.apps.lara.state.mi.us2026-10-11
Contractor license / registrationYeslegislature.mi.gov2026-10-11
Sales & use taxPublishedlegislature.mi.gov2026-10-11

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
Township of Thetford, Michigan
Jurisdiction type
city
Address
4014 East Vienna Road, Clio, MI 48420
Contact
  • url: https://thetfordtwpmi.gov/building/
  • phone: 810-686-5200
Roofing permit required
Required
Contractor registration required
Required
Registration details
  • state_level: Michigan licenses residential maintenance and alteration contractors under the Occupational Code, and that licence "includes the following crafts and trades" among which it names roofing (MCL 339.2404(3)); "A person shall not engage in or attempt to engage in the practice of an occupation regulated under this act" without the licence (MCL 339.601(1)). MCL 339.2403 lists who may work without one, including a project whose "aggregate contract price for the labor, material, and any other items for the undertaking or project is less than $600.00". This record does not decide whether a given roofer falls inside an exemption.
  • city_level: Thetford Township's Building Permit Application asks the contractor for a builders license number and expiration date, a federal employer ID number or reason for exemption, a workers compensation carrier or reason for exemption and an MESC employer number or reason for exemption, and the Building page and the building ordinances listed on the ordinance page name no separate township contractor registration. This record does not decide whether a given roofer falls inside a state exemption.
Permit process note
Thetford Township's Fee Schedule, read October 11, 2026, lists "Roofing" as its own line under Miscellaneous Building Department Fees, priced "Based on value of construction + insp.", with inspections at $75.00, a re-inspection if work is not complete at $75.00 and work started before a permit is issued at double the fee. The Building page lists a building official and zoning administrator, a building inspector and a building assistant at (810) 686-5200 and says "Thetford Township contracts with VIENNA TOWNSHIP for Mechanical, Electrical and Plumbing permit issuance and inspection services." Vienna Township's line is (810) 686-7676, at 3400 West Vienna Road in Clio. The township's Building Permit Application says "INCOMPLETE APPLICATION WILL NOT BE PROCESSED", says "SEPARATE APPLICATIONS MUST BE COMPLETED FOR PLUMBING, MECHANICAL, AND ELECTRICAL WORK PERMITS" and notes "All trades are pulled through Vienna Township". The township office is open Monday through Thursday, 8 a.m. to 5 p.m. The pages name no online permit portal.
Adopted code
2015 Michigan Residential Code. This is state law and it is the same in every Michigan city, village, township and county: the state construction code act says "This act and the code apply throughout the state," and the Michigan Residential Code rule adopts "the international residential code, 2015 edition" with the state amendments in R 408.30500 to R 408.30547g. A 2021 edition was filed with the secretary of state in 2025 but has not taken effect. On July 7, 2025 the Michigan Court of Claims entered a stipulated order in Home Builders Assoc et al. v LARA et al., and the Michigan Department of Licensing and Regulatory Affairs (LARA) says that while that order remains in place "the 2015 versions of the IRC and residential provisions of the IECC standards currently adopted, in part, by each rule set will remain valid and in effect." LARA's Statewide Jurisdiction List names the Township of Thetford as its own building code enforcer. The township's ordinance page lists, under "4.10 - Enforcement of Construction and Building Codes", Ordinance 2015-06-67 (adopted August 13, 1984), which designates the township's ordinance enforcement officer as the enforcing agency under 1972 PA 230, and Ordinance 2015-06-107, the township's Construction Code Ordinance (adopted January 14, 2002, effective February 1, 2002), which adopts the State Building Code by reference and defines it as the Michigan Building Code under Michigan Administrative Rules R408.30101 to R408.30499a. Ordinance 107 names no residential code edition and is dated before February 8, 2016; the rule text it points to was not read, and this record states the 2015 Michigan Residential Code for the reasons above. The ordinance page also lists Ordinance 2015-06-05, which adopts the 2012 edition of the International Property Maintenance Code, a property maintenance code and not a residential building code. The Building Department's page and permit application name no code edition.
Drip edge
Required — Required on asphalt shingle roofs by state law. Michigan makes no amendment to the drip edge rule of the 2015 International Residential Code, Section R905.2.8.5, which applies as published: "A drip edge shall be provided at eaves and rake edges of shingle roofs." Segments overlap by at least 2 inches, the drip edge extends at least 1/4 inch below the roof sheathing and at least 2 inches back onto the deck, it is fastened at no more than 12 inches on center, and underlayment goes over it at the eaves and under it at the rakes. A reroof is held to the same rule, because "Materials and methods of application used for re-covering or replacing an existing roof covering shall comply with the requirements of Chapter 9" (R908.1). The Thetford Township building ordinances listed under 4.10, 4.90 and 4.100 on its ordinance page and its Building Permit Application were read for a local rule and state nothing further on drip edge. About drip edge
Ice & water shield
Required — Required everywhere in Michigan by state law. Michigan fills in the climatic design table of the 2015 code once for the whole state (Rule 516, Table R301.2(1)), and its ice barrier underlayment column reads Yes. The state footnote calls for Yes "for areas where the average daily temperature in January is 25 degrees Fahrenheit" or less, or where ice damming has caused damage. The base code then requires an ice barrier "for asphalt shingles, metal roof shingles, mineral-surfaced roll roofing, slate and slate-type shingles, wood shingles and wood shakes," running "from the lowest edges of all roof surfaces to a point not less than 24 inches (610 mm) inside the exterior wall line of the building" (R905.1.2). Detached accessory structures without conditioned floor area are exempt. On a tear-off, an existing ice barrier that is adhered to the deck may stay and be covered with an additional layer (R908.3, Exception). The Thetford Township building ordinances listed under 4.10, 4.90 and 4.100 on its ordinance page and its Building Permit Application were read for a local rule and state nothing further on ice barrier. About ice & water barrier
Impact-resistant roofing
Not required — No impact-resistance requirement under state law. The 2015 Michigan Residential Code was searched in full and has no hail or impact rating rule for roof coverings: the words hail, impact and UL 2218 do not appear in it, and none of them appears in the roof assemblies chapter of the base 2015 International Residential Code either. Michigan applies one code statewide ("This act and the code apply throughout the state."), and the act gives the power to amend it to the state director, who adopts the model codes "with amendments, additions, or deletions as the director determines appropriate." The Thetford Township building ordinances listed under 4.10, 4.90 and 4.100 on its ordinance page and its Building Permit Application were read for a local rule and state nothing further on impact resistance.
Repair permit threshold
No size or cost threshold for a reroof is published. Thetford Township's Fee Schedule, read October 11, 2026, lists "Roofing" on its own line among its miscellaneous building department fees, priced "Based on value of construction + insp.", and the township's Building Permit Application lists REPAIR and ALTERATION among its types of improvement and says "MANDATORY TO OBTAIN PERMIT". The schedule prices a building permit at $50 for a project of $0 to $3,000, $75 for $3,001 to $5,000 and $100 for $5,001 to $10,000. Under state law, "A building permit is not required for ordinary repairs of a building or structure." (MCL 125.1510), without a definition of ordinary repairs.
Roof layer limit / recover
Two layers at most, under state law. Michigan builds one- and two-family homes to the 2015 Michigan Residential Code, which adopts the 2015 International Residential Code and makes no amendment to its reroofing section, Section R908; the Michigan rule set was searched in full and R908 does not appear in it. The base section therefore applies as the International Code Council publishes it. Section R908.3.1.1 lists the conditions under which a new roof may not be laid over an existing one, and the third is "Where the existing roof has two or more applications of any type of roof covering." One existing layer may be covered once; a roof that already carries two layers is torn off to the deck. The same section also bars covering a roof that is water soaked or too deteriorated to serve as a base, and covering "slate, clay, cement or asbestos-cement tile." Locally, the township's building instruments listed on its ordinance page were read: Ordinance 2015-06-67 and Ordinance 2015-06-107 under 4.10, Ordinances 2015-06-47, 2015-06-122 and 2015-06-123 under 4.90 Flood Plains, and Ordinance 2015-06-05 under 4.100. They designate the enforcing agency, adopt the state building code by reference without modifying its roof provisions, regulate flood plain development and adopt a property maintenance code, and none has a reroofing provision or amends anything in Section R908. The Building Department's page and permit application state no layer rule.
Deck & sheathing requirements
State law, from the base code. Michigan makes no amendment to the roof sheathing section of the 2015 International Residential Code, Section R803, which does not appear in the Michigan rule set, so it applies as published. 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 must 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 may not exceed "the values set forth in Table R503.2.1.1(1), or APA E30." For a shingle roof the base code adds that "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" (R908.2). The Thetford Township building ordinances listed under 4.10, 4.90 and 4.100 on its ordinance page and its Building Permit Application were read for a local rule and state nothing further on roof sheathing.
Sales & use tax
6%, statewide, with no local add-on. This is state law: the General Sales Tax Act sets the tax "equal to 6% of the gross proceeds of the business," the Use Tax Act sets "a total combined rate equal to 6%," and the Michigan Department of Treasury says "Michigan does not allow city or local units to impose sales tax." On a roofing job the roofer is the taxpayer on materials, because the Use Tax Act counts as a consumer "A person acquiring tangible personal property if engaged in the business of constructing, altering, repairing, or improving the real estate of others." Nothing on the Thetford Township Building Department pages or its fee schedule changes this.

Local roofing hub

Roofing in Thetford Township, MichiganCity hub

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Thetford Township's Building Department, at the township offices at 4014 East Vienna Road in Clio, issues the township's building permits, and the township contracts with Vienna Township for the issuance and inspection of its mechanical, electrical and plumbing permits. The State of Michigan's Statewide Jurisdiction List names the Township of Thetford as its own building code enforcer. Michigan's single state construction code applies, and for houses that is the 2015 Michigan Residential Code.

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Sources

Roofing questions: Township of Thetford, MI

Do you need a permit to replace a roof in Township of Thetford, MI?

Yes, a permit is required to replace a roof in Township of Thetford, MI. No size or cost threshold for a reroof is published. Thetford Township's Fee Schedule, read October 11, 2026, lists "Roofing" on its own line among its miscellaneous building department fees, priced "Based on value of construction + insp.", and the township's Building Permit Application lists REPAIR and ALTERATION among its types of improvement and says "MANDATORY TO OBTAIN PERMIT". The schedule prices a building permit at $50 for a project of $0 to $3,000, $75 for $3,001 to $5,000 and $100 for $5,001 to $10,000. Under state law, "A building permit is not required for ordinary repairs of a building or structure." (MCL 125.1510), without a definition of ordinary repairs.

Is ice & water shield required in Township of Thetford, MI?

Yes. Required everywhere in Michigan by state law. Michigan fills in the climatic design table of the 2015 code once for the whole state (Rule 516, Table R301.2(1)), and its ice barrier underlayment column reads Yes. The state footnote calls for Yes "for areas where the average daily temperature in January is 25 degrees Fahrenheit" or less, or where ice damming has caused damage. The base code then requires an ice barrier "for asphalt shingles, metal roof shingles, mineral-surfaced roll roofing, slate and slate-type shingles, wood shingles and wood shakes," running "from the lowest edges of all roof surfaces to a point not less than 24 inches (610 mm) inside the exterior wall line of the building" (R905.1.2). Detached accessory structures without conditioned floor area are exempt. On a tear-off, an existing ice barrier that is adhered to the deck may stay and be covered with an additional layer (R908.3, Exception). The Thetford Township building ordinances listed under 4.10, 4.90 and 4.100 on its ordinance page and its Building Permit Application were read for a local rule and state nothing further on ice barrier.

Is drip edge required in Township of Thetford, MI?

Yes. Required on asphalt shingle roofs by state law. Michigan makes no amendment to the drip edge rule of the 2015 International Residential Code, Section R905.2.8.5, which applies as published: "A drip edge shall be provided at eaves and rake edges of shingle roofs." Segments overlap by at least 2 inches, the drip edge extends at least 1/4 inch below the roof sheathing and at least 2 inches back onto the deck, it is fastened at no more than 12 inches on center, and underlayment goes over it at the eaves and under it at the rakes. A reroof is held to the same rule, because "Materials and methods of application used for re-covering or replacing an existing roof covering shall comply with the requirements of Chapter 9" (R908.1). The Thetford Township building ordinances listed under 4.10, 4.90 and 4.100 on its ordinance page and its Building Permit Application were read for a local rule and state nothing further on drip edge.

Can you roof over an existing roof in Township of Thetford, MI?

Two layers at most, under state law. Michigan builds one- and two-family homes to the 2015 Michigan Residential Code, which adopts the 2015 International Residential Code and makes no amendment to its reroofing section, Section R908; the Michigan rule set was searched in full and R908 does not appear in it. The base section therefore applies as the International Code Council publishes it. Section R908.3.1.1 lists the conditions under which a new roof may not be laid over an existing one, and the third is "Where the existing roof has two or more applications of any type of roof covering." One existing layer may be covered once; a roof that already carries two layers is torn off to the deck. The same section also bars covering a roof that is water soaked or too deteriorated to serve as a base, and covering "slate, clay, cement or asbestos-cement tile." Locally, the township's building instruments listed on its ordinance page were read: Ordinance 2015-06-67 and Ordinance 2015-06-107 under 4.10, Ordinances 2015-06-47, 2015-06-122 and 2015-06-123 under 4.90 Flood Plains, and Ordinance 2015-06-05 under 4.100. They designate the enforcing agency, adopt the state building code by reference without modifying its roof provisions, regulate flood plain development and adopt a property maintenance code, and none has a reroofing provision or amends anything in Section R908. The Building Department's page and permit application state no layer rule.

Do roofing contractors need a license or registration in Township of Thetford, MI?

Yes.

What building code does Township of Thetford, MI use?

2015 Michigan Residential Code. This is state law and it is the same in every Michigan city, village, township and county: the state construction code act says "This act and the code apply throughout the state," and the Michigan Residential Code rule adopts "the international residential code, 2015 edition" with the state amendments in R 408.30500 to R 408.30547g. A 2021 edition was filed with the secretary of state in 2025 but has not taken effect. On July 7, 2025 the Michigan Court of Claims entered a stipulated order in Home Builders Assoc et al. v LARA et al., and the Michigan Department of Licensing and Regulatory Affairs (LARA) says that while that order remains in place "the 2015 versions of the IRC and residential provisions of the IECC standards currently adopted, in part, by each rule set will remain valid and in effect." LARA's Statewide Jurisdiction List names the Township of Thetford as its own building code enforcer. The township's ordinance page lists, under "4.10 - Enforcement of Construction and Building Codes", Ordinance 2015-06-67 (adopted August 13, 1984), which designates the township's ordinance enforcement officer as the enforcing agency under 1972 PA 230, and Ordinance 2015-06-107, the township's Construction Code Ordinance (adopted January 14, 2002, effective February 1, 2002), which adopts the State Building Code by reference and defines it as the Michigan Building Code under Michigan Administrative Rules R408.30101 to R408.30499a. Ordinance 107 names no residential code edition and is dated before February 8, 2016; the rule text it points to was not read, and this record states the 2015 Michigan Residential Code for the reasons above. The ordinance page also lists Ordinance 2015-06-05, which adopts the 2012 edition of the International Property Maintenance Code, a property maintenance code and not a residential building code. The Building Department's page and permit application name no code edition.