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Permitting Authorities / Charter Township of Plymouth - Building Department

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

Adopted code

Charter Township of Plymouth - Building Department

Yes, a permit is required to replace a roof in Charter Township of Plymouth, MI, issued by Charter Township of Plymouth - Building Department. In the Charter Township of Plymouth a reroof is applied for on the township's Building Permit Application, which lists "Replacement-" "Windows/Siding/Roof/Egress" "Door" among its project types and asks for the scope of work and the cost of construction. Contractors apply through the township's BS&A Online portal after linking their account with the township; the township says "Homeowners cannot pull permits online." and "PDFs of applications are available on the township website here." The Building Department says "Permits usually have at least two inspections - a rough and a final." and that most inspections should be scheduled by 2:00 pm the day before; building inspections run "Monday - Friday, 9:00AM to when scheduled inspections completed." Fees follow the department's "Fee Schedule - Building Department (Effective December 1, 2017 - Amended March 9, 2021)", which the township posts as a scanned document that was not read for this record, so ask the department for the current reroof fee. The department is at 9955 N. Haggerty Road, First Floor, Plymouth, MI 48170, (734) 354-3210, open 8:00 am to 4:30 pm.

Roof code checklist: Charter Township of Plymouth, MI

ItemAnswerCode citeSourceVerified
Permit to replace a roofYes20260922-Building_Permit_App.pdf2026-10-15
Repair permit thresholdPublished20260922-Building_Permit_App.pdf2026-10-15
Layer limit / roof-overPublishedR908.3.1.1codes.iccsafe.org2026-10-15
Deck & sheathingPublishedR905.2.1codes.iccsafe.org2026-10-15
Drip edgeYesR905.2.8.5codes.iccsafe.org2026-10-15
Ice & water shieldYesR905.1.2ars.apps.lara.state.mi.us2026-10-15
Mid-roof inspectionNot published
Impact-resistant (Class 4) roofingNoars.apps.lara.state.mi.us2026-10-15
Wind design criteriaNot published
Adopted codePublishedars.apps.lara.state.mi.us2026-10-15
Contractor license / registrationYeslegislature.mi.gov2026-10-15
Sales & use taxPublishedlegislature.mi.gov2026-10-15

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
Charter Township of Plymouth, Michigan
Jurisdiction type
city
Address
9955 N. Haggerty Road, Plymouth, MI 48170
Contact
  • url: https://www.plymouthtownshipmi.gov/government/departments/building_department/index.php
  • phone: 734-354-3210
Permit portal
Permit portal
Roofing permit required
Required
Contractor registration required
Required
Permit process note
In the Charter Township of Plymouth a reroof is applied for on the township's Building Permit Application, which lists "Replacement-" "Windows/Siding/Roof/Egress" "Door" among its project types and asks for the scope of work and the cost of construction. Contractors apply through the township's BS&A Online portal after linking their account with the township; the township says "Homeowners cannot pull permits online." and "PDFs of applications are available on the township website here." The Building Department says "Permits usually have at least two inspections - a rough and a final." and that most inspections should be scheduled by 2:00 pm the day before; building inspections run "Monday - Friday, 9:00AM to when scheduled inspections completed." Fees follow the department's "Fee Schedule - Building Department (Effective December 1, 2017 - Amended March 9, 2021)", which the township posts as a scanned document that was not read for this record, so ask the department for the current reroof fee. The department is at 9955 N. Haggerty Road, First Floor, Plymouth, MI 48170, (734) 354-3210, open 8:00 am to 4:30 pm.
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 Plymouth as its own building code enforcer. The Building Department's "Current Code Enforced" notice dated April 9, 2025 lists "Michigan Residential Code 2015" with an effective date of February 8, 2016. The township's Code of Ordinances is published on American Legal Publishing, which served a browser challenge to this directory's research client, so the township's codified building chapter was not read for this record.
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 township's Building Department page and Building Permit Application were read for a local rule and state nothing further on drip edge; the township's codified building chapter was not read. 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 township's Building Department page and Building Permit Application were read for a local rule and state nothing further on ice barrier; the township's codified building chapter was not read. 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 township's Building Department page and Building Permit Application were read for a local rule and state nothing further on impact resistance; the township's codified building chapter was not read.
Repair permit threshold
The Charter Township of Plymouth's Building Permit Application (September 2026) lists roof replacement as a project type of its own: under "Project Type" it offers "Replacement-" "Windows/Siding/Roof/Egress" "Door" beside new homes, additions, decks and garages. The application states no size, square or dollar point below which roof work needs no permit, so it leaves open whether a small roof repair needs one; it asks for the "Cost of Construction (labor and materials)" and says "Additional documents and plan review may be required. Please contact the Building Department or visit the township website for more information." The state part: Michigan's construction code act says "A building permit is not required for ordinary repairs of a building or structure" and does not define ordinary repairs. The township has published nothing applying that relief to roof work.
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 Building Department page, its April 9, 2025 list of codes enforced and the September 2026 Building Permit Application state no layer rule. The township's Code of Ordinances is published on American Legal Publishing, which served a browser challenge to this directory's research client, so the codified building chapter was not read, and this record states the state rule without saying that no local amendment exists.
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 township's Building Department page and Building Permit Application were read for a local rule and state nothing further on roof sheathing; the township's codified building chapter was not read.
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 Charter Township of Plymouth Building Department pages or in its permit application changes this.

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The Charter Township of Plymouth's Building Department, on the first floor of the township hall at 9955 N. Haggerty Road, issues building permits and inspects construction in the township, and takes contractor permit applications through the township's BS&A Online portal. The State of Michigan's jurisdiction list names the Township of Plymouth 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: Charter Township of Plymouth, MI

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

Yes, a permit is required to replace a roof in Charter Township of Plymouth, MI. The Charter Township of Plymouth's Building Permit Application (September 2026) lists roof replacement as a project type of its own: under "Project Type" it offers "Replacement-" "Windows/Siding/Roof/Egress" "Door" beside new homes, additions, decks and garages. The application states no size, square or dollar point below which roof work needs no permit, so it leaves open whether a small roof repair needs one; it asks for the "Cost of Construction (labor and materials)" and says "Additional documents and plan review may be required. Please contact the Building Department or visit the township website for more information." The state part: Michigan's construction code act says "A building permit is not required for ordinary repairs of a building or structure" and does not define ordinary repairs. The township has published nothing applying that relief to roof work.

Is ice & water shield required in Charter Township of Plymouth, 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 township's Building Department page and Building Permit Application were read for a local rule and state nothing further on ice barrier; the township's codified building chapter was not read.

Is drip edge required in Charter Township of Plymouth, 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 township's Building Department page and Building Permit Application were read for a local rule and state nothing further on drip edge; the township's codified building chapter was not read.

Can you roof over an existing roof in Charter Township of Plymouth, 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 Building Department page, its April 9, 2025 list of codes enforced and the September 2026 Building Permit Application state no layer rule. The township's Code of Ordinances is published on American Legal Publishing, which served a browser challenge to this directory's research client, so the codified building chapter was not read, and this record states the state rule without saying that no local amendment exists.

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

Yes.

What building code does Charter Township of Plymouth, 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 Plymouth as its own building code enforcer. The Building Department's "Current Code Enforced" notice dated April 9, 2025 lists "Michigan Residential Code 2015" with an effective date of February 8, 2016. The township's Code of Ordinances is published on American Legal Publishing, which served a browser challenge to this directory's research client, so the township's codified building chapter was not read for this record.