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Permitting Authorities / Georgia / City of Marietta, Georgia - Development Services / Building Inspections

Do you need a permit to replace a roof in Marietta, GA?

Adopted code

City of Marietta, Georgia - Development Services / Building Inspections

Yes, a permit is required to replace a roof in Marietta, GA, issued by City of Marietta, Georgia - Development Services / Building Inspections. Marietta states the permit trigger broadly and does not carve roofing out of it. The city's Building Permits guidance provides that a permit is required "whenever an owner or contractor intends to construct new, enlarge, alter, repair, move, demolish a building or structure, or install or alter any electrical, gas, mechanical, or plumbing system," and adds that utility construction and site development also require permits. Re-roofing a dwelling is an alteration/repair of a structure and falls inside that trigger; roofing does not appear among the exemptions Marietta publishes (its "Is anything exempt from a permit?" guidance surfaces fence construction as an exemption, subject to separate Planning and Zoning height, location and configuration requirements).

Roof code checklist: Marietta, GA

ItemAnswerCode citeSourceVerified
Permit to replace a roofYesmariettaga.gov2026-07-25
Repair permit thresholdPublishedmariettaga.gov2026-07-25
Layer limit / roof-overPublisheddca.georgia.gov2026-09-11
Deck & sheathingPublishedR905.2.1dca.georgia.gov2026-09-05
Drip edgeYesR905.2.8.5dca.georgia.gov2026-09-05
Ice & water shieldNot published
Mid-roof inspectionNot published
Impact-resistant (Class 4) roofingNodca.georgia.gov2026-07-25
Wind design criteriaNot published
Adopted codePublishedSec. 7-4-2-020library.municode.com2026-09-05
Contractor license / registrationNot published
Sales & use taxPublishedcobbcounty.gov2026-07-25

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
City of Marietta, Georgia
Jurisdiction type
city
Address
Marietta, GA
Contact
  • url: https://www.mariettaga.gov/443/Building-Permits
  • phone: 770-794-5659
Roofing permit required
Required
Registration details
  • state_level: STATEWIDE, AND IT TURNS ON WHAT KIND OF CONTRACTOR YOU ARE RATHER THAN ON THE TRADE. Georgia licenses residential and commercial general contractors through the State Licensing Board for Residential and Commercial General Contractors under O.C.G.A. Title 43, Chapter 41, created by House Bill 1003 of 2004 and amended since, including by Senate Bill 115 of 2007 and Senate Bill 503 of 2024. There is no Georgia licence titled roofer: the chapter creates residential-basic, residential-light commercial and commercial general contractor licences and no roofing class, and O.C.G.A. 43-41-17(e) names the Chapter 14 trades it deals with as plumbing, conditioned air contracting, utility contracting, electrical contracting and low-voltage contracting, which does not include roofing. Section 43-41-17(a) provides that "No person, whether an individual or a business organization, shall have the right to engage in the business of residential contracting or commercial general contracting without a current, valid residential contractor license or commercial general contractor license, respectively", a requirement in force since July 1, 2008. What pulls a roofing job inside that requirement is a definition rather than a trade: O.C.G.A. 43-41-2(9) makes a person a residential contractor where the work falls into the residential-basic or residential-light commercial category and "the total value of the work or activity or of the compensation to be received by the contractor for such activity or work, whichever is the higher, exceeds $2,500.00". That figure is per job, taken on the higher of work value or compensation; it is not an annual figure, not a materials-only figure, and not specific to roofing. TWO EXCEPTIONS REACH ROOFING AND NEITHER IS A DOLLAR TEST. The first is the specialty-contractor exception at O.C.G.A. 43-41-17(f), which begins "Nothing in this chapter shall preclude a specialty contractor from offering or contracting to perform or undertaking or performing for an owner limited, specialty, or specific trade contractor work". As Chapter 41 was first enacted in 2004 that sentence carried on to confine the exception to work that put no part of the job under anyone but the contractor's own direct employees; Senate Bill 115 struck that limitation out in 2007, so the exception no longer states a supervision test. In its place the same subsection directs that "The board shall, by rule or policy, identify specialty contractors or other criteria to determine eligibility under the exemption of this subsection." Senate Bill 115 set a January 1, 2008 deadline for that, which Senate Bill 503 of 2024 deleted. The second is the repair exception at O.C.G.A. 43-41-17(g): "Nothing in this chapter shall preclude a person from offering or contracting to perform or undertaking or performing for an owner repair work, provided that the person performing the repair work discloses to the owner that such person does not hold a license under this chapter and provided, further, that such work does not affect the structural integrity of the real property." The board defined repair at Ga. Comp. R. & Regs. r. 553-8-.01 to mean "fixing, mending, maintenance, replacement or restoring of a part or portions of real property to good condition", on four conditions: written disclosure to the owner that the person is not licensed as a residential or general contractor, no delegation of supervision to anyone but employees, work that does not affect the life safety requirements or structural integrity of the property, and obtaining the permits and inspections the local authority requires. Whether a full tear-off and replacement is repair within that definition is a legal question neither the statute nor the rule answers. WHAT THE BOARD HAS SAID ABOUT ROOFERS, AND WHERE IT STOPS. No rule identifying specialty contractors was ever made: the board's regulations at Department 553 of the Georgia Administrative Code run twelve chapters - organisation, examination exemption, qualifications for licensure in each division, procedural rules, fees, written warranty, definitions, disciplinary action, inactive licence, changes in status, and licence renewal and continuing education - and not one of them names a trade. Since Senate Bill 115 the same subsection has also let an exempt specialty contractor take on work that would otherwise need a licence "where the total scope of the work to be performed is predominantly of the type for which such specialty contractor is duly recognized as exempt under this subsection by the board, provided that such other work involved is incidental to and an integral part of the exempt work performed by the specialty contractor and does not exceed the greater of $10,000.00 or 25 percent of the total value at the time of contracting of the work to be performed". The statute allowed policy as the alternative to a rule, and the board has published it on its own site, sos.ga.gov. Its "Traditional Specialty Contractors Policy Statements" (revised 03/06/20) list Flat Roofing, Sheet Metal Roofing, Shingles and Shakes, and Gutters and Downspouts among the specialty categories, and state that "Traditional specialty contractors will not be required to carry a residential or general contractor license but will be required to comply with all applicable national, state, and local codes and ordinances." Its "Limited Service Specialty Contractors Policy Statements" (revised 01/31/12) list "Re-Roofing of Existing Structures" as a separate limited-service category whose allowable work is rooftop equipment, demolition and remediation, adding: "You may be required to hold a contractor license if your company exceeds this scope of work." Both documents say "The following list is under development and subject to change." So a roofer whose job is predominately shingle, flat or sheet-metal roofing, with any other work incidental to it and inside the statute's $10,000.00-or-25-percent limit, is within the board's published specialty categories, which the board says do not require the residential or general contractor licence; a job that goes beyond that scope can bring the licence requirement back. The list is the board's policy rather than a rule and can change, so where a job is marginal, put its scope to the board before bidding. Two state publications say the same in general terms: the board's consumer handout "TIPS FOR CONSUMERS", which Cherokee County gives out at its permit counter, says specialty services "do not require that the person be licensed" and names roofers, and the Attorney General's Consumer Protection Division says "certain specialty occupations such as roofers, painters, drywall contractors, and repair handymen are not required to be licensed by the state"; Johns Creek's building guidance notes "exceptions for limited specialty contractors such as pool and retaining wall installers, roofers, etc." THE SANCTION IS WHY THIS IS WORTH SETTLING BEFORE YOU SIGN. Under O.C.G.A. 43-41-17(b) a contract entered into on or after July 1, 2008 for work for which a licence is required, between an owner and a contractor who does not hold one, "shall be unenforceable in law or in equity by the unlicensed contractor", and "no lien or bond claim shall exist in favor of the unlicensed contractor for any labor, services, or materials provided under the contract". AND ONE THING THE STATE DOES TO THE LOCAL LAYER. O.C.G.A. 43-41-17(c) provides that "no municipality or county may require any such person licensed under this chapter to comply with any additional licensing requirements imposed by such municipality or county relative to the performance of construction work subject to the licensing requirements under this chapter", while preserving a local licence, registration or certification requirement already "in effect and operation as of the effective date of this chapter or July 1, 2004, whichever is earlier" - and even then the local requirement may not shut a state-licensed contractor out of the jurisdiction. So where a Georgia city or county credential is pressed against a state-licensed contractor, the date the local scheme was adopted is the test.
  • city_level: Marietta runs a business and occupation tax scheme, not a contractor registration. The Business License Division administers business and occupation taxes, regulatory fees and franchise fees; the City uses business license and occupational tax certificate as names for the same document, which is ordinary business licensing rather than a roofing-specific trade credential. Business License Division, 205 Lawrence Street, Marietta, GA 30060, mailing address P.O. Box 609, Marietta, GA 30061-0609, phone 770-794-5520. Marietta's business-licence chapter, Municipal Code Chapter 8-4, was read in full for this entry and creates no trade licence, contractor registration or roofing credential; its single reference to a contractor is in the definition of doing business, which provides that the term includes independent contractors. What Marietta does instead is enforce the state credential at the permit counter. Municipal Code 7-4-2-050 E., Contractor Responsibilities, makes it the duty of every contractor who contracts for the installation or repair of buildings and structures for which a permit is required to comply with state or local licensing rules, and provides: "In such case that the state requires a contractor to have obtained a state license before they are permitted to perform work, the contractor shall supply the local government with their license number before receiving a permit for work to be performed." So a roofer needing a state residential or general contractor licence for the job will be asked for the licence number before Marietta issues the permit. Georgia does let a municipality keep enforcing a contractor licensing or registration ordinance already in effect and operation as of July 1, 2004 (O.C.G.A. 43-41-17(c)), but the Marietta chapters read for this entry disclose no such scheme.
Permit process note
Marietta states the permit trigger broadly and does not carve roofing out of it. The city's Building Permits guidance provides that a permit is required "whenever an owner or contractor intends to construct new, enlarge, alter, repair, move, demolish a building or structure, or install or alter any electrical, gas, mechanical, or plumbing system," and adds that utility construction and site development also require permits. Re-roofing a dwelling is an alteration/repair of a structure and falls inside that trigger; roofing does not appear among the exemptions Marietta publishes (its "Is anything exempt from a permit?" guidance surfaces fence construction as an exemption, subject to separate Planning and Zoning height, location and configuration requirements).
Adopted code
STATE-GOVERNED, NOT CITY-SET. Georgia designates a specific list of codes as MANDATORY state minimum standard codes that bind construction anywhere in the state whether or not the local government elects to enforce them locally. O.C.G.A. 8-2-25(a) provides that on and after July 1, 2004 the codes enumerated in O.C.G.A. 8-2-20(9)(A)(i)(I)-(VIII) and (9)(B)(i)(I)-(VIII) "shall have state-wide application and shall not require adoption by a municipality or county"; the Georgia Department of Community Affairs (DCA) restates this as "Georgia law gives the enumerated codes statewide applicability," so local governments need not formally adopt them but must adopt administrative procedures in order to enforce them. The International Residential Code is on the mandatory list. The operative residential standard is therefore the Georgia State Minimum Standard One- and Two-Family Dwelling Code = the 2024 International Residential Code with Georgia Amendments (the "Georgia State Amendments to the International Residential Code (2024 Edition), Revised January 1, 2026" packet), which the DCA Board adopted with an effective date of January 1, 2026. Marietta's Plan Review page states that all plans must comply with the current International Building Code, International Residential Code, Georgia Fire Codes and City of Marietta construction codes. A local government MAY adopt local amendments, but only ones MORE stringent than the state minimum, only where justified by local climatic, geologic, topographic or public safety factors, only after submitting the proposal with legislative findings to DCA for review and written recommendation, and only after filing the adopted amendment with the department. No Marietta-specific roofing amendment on file with DCA was located, so the state text is the operative roofing standard for Marietta. APPENDIX U, DISASTER RESILIENT CONSTRUCTION, IS NOT AMONG THE PERMISSIVE CODES MARIETTA TAKES UP. The Department of Community Affairs adopts that appendix to the Residential Code as a permissive code rather than a mandatory one, and the appendix states the same of itself at AU101.3.1: "The provisions of this appendix are not mandatory unless specifically referenced in an adopting ordinance of [NAME OF JURISDICTION]. If adopted, the provisions shall apply to all new development and to substantial improvements to existing development." The Department's guidance sets out the route: "in order for a local government to enforce one or more of these permissive codes, that code or codes must be adopted, either by ordinance or resolution, by the local jurisdiction", with a copy of the ordinance or resolution forwarded to the Department under O.C.G.A. 8-2-25(b). Marietta records both halves of that choice in one section. Code of Ordinances section 7-4-2-020, State minimum standard codes adopted, declares in paragraph A the intention "to enforce the latest edition of the following Georgia State Minimum Standard Codes, as adopted and amended by the Georgia Department of Community Affairs" and lists the nine mandatory codes, the International Residential Code for One- and Two-Family Dwellings among them; paragraph B then adopts by reference the International Existing Building Code, and paragraph C the Standard Existing Building Code and the Standard Swimming Pool Code. Those three are the permissive codes Marietta has taken up, and Appendix U is not one of them. Article 7-4-2 is the whole of the City's building instrument, Chapter 7-4 holding only that article and a fair housing article, and it was read in full: the word appendix does not occur in it once, and neither does Disaster Resilient. So the enhanced roof-deck sealing and shingle fastening the appendix carries at AU408 do not apply in Marietta. Note in any event that AU101.3.1 would limit the appendix, where a jurisdiction does adopt it, to new development and to substantial improvements to existing development, and the appendix does not define substantial improvement, so it is not a rule about how an ordinary reroof is installed. The Code of Ordinances is codified through Ordinance No. 8523, enacted June 10, 2026.
Drip edge
Required — STATE-GOVERNED, NOT CITY-SET. Marietta adopts the state codes rather than writing its own: Municipal Code section 7-4-2-020 declares the intention "to enforce the latest edition of the following Georgia State Minimum Standard Codes, as adopted and amended by the Georgia Department of Community Affairs," and lists the "International Residential Code for One- & Two-Family Dwellings" among them. The International Residential Code is in any event a mandatory state minimum standard code, so under O.C.G.A. 8-2-25(a) it binds construction in Marietta whether or not the City elects to enforce it locally. The Georgia Department of Community Affairs amendment packet for the 2024 IRC carries no amendment to Chapter 9 (Roof Assemblies), so the Chapter 9 drip-edge provision at Section R905.2.8.5 stands as written, neither deleted nor rewritten for Georgia. Marietta's own building instrument was read in full for this entry: Chapter 7-4, Building and Housing Regulations, in its entirety, meaning all fourteen sections of Article 7-4-2 (General Provisions), 7-4-2-020 through 7-4-2-150. Not one of them mentions drip edge, underlayment, sheathing or shingles, and none of them amends any part of IRC Chapter 9, so there is no Marietta rewrite either. The operative ICC text of R905.2.8.5, which sets the extent, lap and fastening specifics, sits behind the ICC paywall; this record does not restate it and does not rely on any third-party republication of it. What is recorded is the sourced fact that the requirement is in force in Marietta unamended. About drip edge
Impact-resistant roofing
Not required — The Georgia State Amendments to the 2024 IRC (a full section-by-section amendment list) contains no entry touching IRC Chapter 9, and no Marietta-specific roofing amendment is on file with the Georgia Department of Community Affairs. No impact-resistant, Class 4, or UL 2218 roof-covering requirement appears in either instrument, so none applies in Marietta beyond whatever the unamended base 2024 IRC itself requires.
Repair permit threshold
Marietta publishes NO cost-based exemption for repair or re-roofing permits - unlike the City of Atlanta, which exempts non-structural residential re-roofs under a $10,000 repair-valuation threshold, Marietta's own Building Permits guidance states a permit is required "whenever an owner or contractor intends to construct new, enlarge, alter, repair, move, demolish a building or structure," with no dollar-value carve-out for repair work. Marietta's own "Is anything exempt from a permit?" guidance names only fence construction as exempt (subject to separate Planning and Zoning height, location and configuration requirements); re-roofing is not listed among the exemptions. Practical effect: a Marietta re-roof requires a permit regardless of job cost.
Roof layer limit / recover
TWO LAYERS MAXIMUM, SET BY THE STATE CODE; MARIETTA WRITES NO LAYER RULE OF ITS OWN. Marietta adopts the state codes rather than writing its own: Municipal Code section 7-4-2-020 declares the intention "to enforce the latest edition of the following Georgia State Minimum Standard Codes, as adopted and amended by the Georgia Department of Community Affairs," and lists the "International Residential Code for One- & Two-Family Dwellings" among them. Marietta's own building instrument was read in full for this entry: Chapter 7-4, Building and Housing Regulations, in its entirety, meaning all fourteen sections of Article 7-4-2 (General Provisions), 7-4-2-020 through 7-4-2-150. It contains no rule of its own on re-covering a roof or on the number of roof-covering layers, no amendment to any part of IRC Chapter 9, and no reference to R908. Marietta's other development chapter, Chapter 7-8 (Comprehensive Development Code), was also searched and contains none either. The Georgia Department of Community Affairs amendment packet for the 2024 IRC carries no amendment to Chapter 9. So the operative limit on re-covering an existing roof in Marietta is whatever the base IRC Chapter 9 recover provisions at Section R908 require, as adopted for Georgia and unmodified by the City. Base-code rule, read at 2024 International Residential Code Section R908.4, Roof recover, Exceptions, and quoted here rather than left behind the ICC paywall: a roof recover "shall not be permitted" where "the existing roof has two or more applications of any type of roof covering." One existing layer may be recovered; a second existing layer means a tear-off to the deck. Confirm anything unusual with Marietta Development Services before the tear-off.
Deck & sheathing requirements
NOT SET BY THE CITY, AND NOT RESTATED HERE. Marietta adopts the state codes rather than writing its own: Municipal Code section 7-4-2-020 declares the intention "to enforce the latest edition of the following Georgia State Minimum Standard Codes, as adopted and amended by the Georgia Department of Community Affairs," and lists the "International Residential Code for One- & Two-Family Dwellings" among them. Marietta's own building instrument was read in full for this entry: Chapter 7-4, Building and Housing Regulations, in its entirety, meaning all fourteen sections of Article 7-4-2 (General Provisions), 7-4-2-020 through 7-4-2-150. Nothing in it addresses roof-deck sheathing, the substrate an asphalt shingle may be fastened to, or the fastening of a roof covering; the words sheathing, underlayment and shingle do not appear in the chapter at all, and its only references to a roof are in the inspection sequence, where the frame and rough-in inspections are to be made after the roof, framing, fireblocking and bracing are in place. The Georgia Department of Community Affairs amendment packet for the 2024 IRC likewise carries no amendment to Chapter 9 (Roof Assemblies). The governing provision is therefore the base Chapter 9 sheathing requirement, IRC Section R905.2.1, as adopted for Georgia and unmodified by either government. That ICC text is behind the ICC paywall and this record deliberately does not reproduce it from any third-party republication, so a roofer needing the exact wording should read it in the code itself or ask Marietta Development Services.
Sales & use tax
6.00% combined in Marietta: 4.00% Georgia state rate + 2.00% Cobb County local rate. Marietta levies no additional municipal sales tax of its own, so the 6.00% figure applies uniformly across Cobb County including the Marietta city limits. This is the rate a roofing contractor pays on materials purchased in Marietta.

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The permitting authority for the City of Marietta, Georgia, the county seat of Cobb County in the Atlanta metropolitan area. Marietta is an incorporated municipality that runs its own building-permit and inspection program; it is NOT served by Cobb County Community Development for permitting within the city limits. (This record covers Marietta, Georgia, not Marietta, Ohio.) Marietta enforces the Georgia State Minimum Standard Codes, whose technical content is set by the state and applies statewide under O.C.G.A. 8-2-25(a) regardless of local adoption; the city's own levers are permit administration, fees, inspections, business licensing, and any local amendment it has filed with the Georgia Department of Community Affairs.

Hail reports near Marietta, GA

Reports, last 24 months
6
Largest, last 24 months
1.25 in Jun 27, 2025
Most recent
Sep 6, 2025 1.00 in
Reports, last 5 years
12
5 most recent reports, last 5 years
DateHail sizeDistance
Sep 6, 20251.00 in10 mi NNW
Sep 6, 20251.00 in9 mi NNW
Jun 27, 20251.25 in9 mi N
Jun 26, 20251.25 in9 mi S
Jun 26, 20251.00 in9 mi S

Source: NOAA Storm Prediction Center severe weather database and daily storm reports (reports since the start of the current year are preliminary), within 10 miles of Marietta, GA (Census point). Data through Oct 7, 2026, not updated since. A report is an observation, not a damage record.

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Sources

Roofing questions: Marietta, GA

Do you need a permit to replace a roof in Marietta, GA?

Yes, a permit is required to replace a roof in Marietta, GA. Marietta publishes NO cost-based exemption for repair or re-roofing permits - unlike the City of Atlanta, which exempts non-structural residential re-roofs under a $10,000 repair-valuation threshold, Marietta's own Building Permits guidance states a permit is required "whenever an owner or contractor intends to construct new, enlarge, alter, repair, move, demolish a building or structure," with no dollar-value carve-out for repair work. Marietta's own "Is anything exempt from a permit?" guidance names only fence construction as exempt (subject to separate Planning and Zoning height, location and configuration requirements); re-roofing is not listed among the exemptions. Practical effect: a Marietta re-roof requires a permit regardless of job cost.

Is drip edge required in Marietta, GA?

Yes. STATE-GOVERNED, NOT CITY-SET. Marietta adopts the state codes rather than writing its own: Municipal Code section 7-4-2-020 declares the intention "to enforce the latest edition of the following Georgia State Minimum Standard Codes, as adopted and amended by the Georgia Department of Community Affairs," and lists the "International Residential Code for One- & Two-Family Dwellings" among them. The International Residential Code is in any event a mandatory state minimum standard code, so under O.C.G.A. 8-2-25(a) it binds construction in Marietta whether or not the City elects to enforce it locally. The Georgia Department of Community Affairs amendment packet for the 2024 IRC carries no amendment to Chapter 9 (Roof Assemblies), so the Chapter 9 drip-edge provision at Section R905.2.8.5 stands as written, neither deleted nor rewritten for Georgia. Marietta's own building instrument was read in full for this entry: Chapter 7-4, Building and Housing Regulations, in its entirety, meaning all fourteen sections of Article 7-4-2 (General Provisions), 7-4-2-020 through 7-4-2-150. Not one of them mentions drip edge, underlayment, sheathing or shingles, and none of them amends any part of IRC Chapter 9, so there is no Marietta rewrite either. The operative ICC text of R905.2.8.5, which sets the extent, lap and fastening specifics, sits behind the ICC paywall; this record does not restate it and does not rely on any third-party republication of it. What is recorded is the sourced fact that the requirement is in force in Marietta unamended.

Can you roof over an existing roof in Marietta, GA?

TWO LAYERS MAXIMUM, SET BY THE STATE CODE; MARIETTA WRITES NO LAYER RULE OF ITS OWN. Marietta adopts the state codes rather than writing its own: Municipal Code section 7-4-2-020 declares the intention "to enforce the latest edition of the following Georgia State Minimum Standard Codes, as adopted and amended by the Georgia Department of Community Affairs," and lists the "International Residential Code for One- & Two-Family Dwellings" among them. Marietta's own building instrument was read in full for this entry: Chapter 7-4, Building and Housing Regulations, in its entirety, meaning all fourteen sections of Article 7-4-2 (General Provisions), 7-4-2-020 through 7-4-2-150. It contains no rule of its own on re-covering a roof or on the number of roof-covering layers, no amendment to any part of IRC Chapter 9, and no reference to R908. Marietta's other development chapter, Chapter 7-8 (Comprehensive Development Code), was also searched and contains none either. The Georgia Department of Community Affairs amendment packet for the 2024 IRC carries no amendment to Chapter 9. So the operative limit on re-covering an existing roof in Marietta is whatever the base IRC Chapter 9 recover provisions at Section R908 require, as adopted for Georgia and unmodified by the City. Base-code rule, read at 2024 International Residential Code Section R908.4, Roof recover, Exceptions, and quoted here rather than left behind the ICC paywall: a roof recover "shall not be permitted" where "the existing roof has two or more applications of any type of roof covering." One existing layer may be recovered; a second existing layer means a tear-off to the deck. Confirm anything unusual with Marietta Development Services before the tear-off.

What building code does Marietta, GA use?

STATE-GOVERNED, NOT CITY-SET. Georgia designates a specific list of codes as MANDATORY state minimum standard codes that bind construction anywhere in the state whether or not the local government elects to enforce them locally. O.C.G.A. 8-2-25(a) provides that on and after July 1, 2004 the codes enumerated in O.C.G.A. 8-2-20(9)(A)(i)(I)-(VIII) and (9)(B)(i)(I)-(VIII) "shall have state-wide application and shall not require adoption by a municipality or county"; the Georgia Department of Community Affairs (DCA) restates this as "Georgia law gives the enumerated codes statewide applicability," so local governments need not formally adopt them but must adopt administrative procedures in order to enforce them. The International Residential Code is on the mandatory list. The operative residential standard is therefore the Georgia State Minimum Standard One- and Two-Family Dwelling Code = the 2024 International Residential Code with Georgia Amendments (the "Georgia State Amendments to the International Residential Code (2024 Edition), Revised January 1, 2026" packet), which the DCA Board adopted with an effective date of January 1, 2026. Marietta's Plan Review page states that all plans must comply with the current International Building Code, International Residential Code, Georgia Fire Codes and City of Marietta construction codes. A local government MAY adopt local amendments, but only ones MORE stringent than the state minimum, only where justified by local climatic, geologic, topographic or public safety factors, only after submitting the proposal with legislative findings to DCA for review and written recommendation, and only after filing the adopted amendment with the department. No Marietta-specific roofing amendment on file with DCA was located, so the state text is the operative roofing standard for Marietta. APPENDIX U, DISASTER RESILIENT CONSTRUCTION, IS NOT AMONG THE PERMISSIVE CODES MARIETTA TAKES UP. The Department of Community Affairs adopts that appendix to the Residential Code as a permissive code rather than a mandatory one, and the appendix states the same of itself at AU101.3.1: "The provisions of this appendix are not mandatory unless specifically referenced in an adopting ordinance of [NAME OF JURISDICTION]. If adopted, the provisions shall apply to all new development and to substantial improvements to existing development." The Department's guidance sets out the route: "in order for a local government to enforce one or more of these permissive codes, that code or codes must be adopted, either by ordinance or resolution, by the local jurisdiction", with a copy of the ordinance or resolution forwarded to the Department under O.C.G.A. 8-2-25(b). Marietta records both halves of that choice in one section. Code of Ordinances section 7-4-2-020, State minimum standard codes adopted, declares in paragraph A the intention "to enforce the latest edition of the following Georgia State Minimum Standard Codes, as adopted and amended by the Georgia Department of Community Affairs" and lists the nine mandatory codes, the International Residential Code for One- and Two-Family Dwellings among them; paragraph B then adopts by reference the International Existing Building Code, and paragraph C the Standard Existing Building Code and the Standard Swimming Pool Code. Those three are the permissive codes Marietta has taken up, and Appendix U is not one of them. Article 7-4-2 is the whole of the City's building instrument, Chapter 7-4 holding only that article and a fair housing article, and it was read in full: the word appendix does not occur in it once, and neither does Disaster Resilient. So the enhanced roof-deck sealing and shingle fastening the appendix carries at AU408 do not apply in Marietta. Note in any event that AU101.3.1 would limit the appendix, where a jurisdiction does adopt it, to new development and to substantial improvements to existing development, and the appendix does not define substantial improvement, so it is not a rule about how an ordinary reroof is installed. The Code of Ordinances is codified through Ordinance No. 8523, enacted June 10, 2026.