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Permitting Authorities / City of Gahanna - Division of Building

Do you need a permit to replace a roof in Gahanna, OH?

Adopted code

City of Gahanna - Division of Building

The City of Gahanna Division of Building issues building permits, reviews plans and inspects construction work in Gahanna (Franklin County); the city's permitting page lists the Gahanna Civic Center at 825 Tech Center Drive. The Residential Code of Ohio applies to one-, two- and three-family dwellings in Gahanna as it does statewide. This listing covers the office's contact details and the rules state law sets for every Ohio jurisdiction; it does not cover Gahanna's own codified building ordinances.

Jurisdiction
City of Gahanna, Ohio
Jurisdiction type
city
Address
825 Tech Center Drive, Gahanna, OH 43230
Contact
  • url: https://www.gahanna.gov/229/Permitting
  • phone: 614-342-4010
Permit portal
Permit portal
Adopted code
The Residential Code of Ohio (RCO), Ohio Administrative Code Division 4101:8, adopted by the Ohio Board of Building Standards, governs one-, two- and three-family dwellings statewide; its roof assemblies rule (OAC 4101:8-9-01) and administration rule (OAC 4101:8-1-01) carry an effective date of July 1, 2019. Ohio Rev. Code 3781.01(B) provides that the state residential building code "does not prevent a local governing authority from adopting additional regulations governing residential structures that do not conflict with the state residential building code". Under RCO 101.5, where no building department certified by the Board of Building Standards for residential buildings has jurisdiction, "the owner is not required to make submission of construction documents, seek approvals, request inspections, or obtain certificates of occupancy". In Gahanna, the Division of Building issues permits, reviews plans, inspects construction work and enforces building regulations. This record did not read Gahanna's own codified ordinances, so any additional local building regulation is not reflected here.
Ice & water shield
Required — SET BY STATE RULE. Table 301.2(1) of the Residential Code of Ohio (OAC 4101:8-3-01) marks ice barrier underlayment as required, and its footnote h states that "all jurisdictions in Ohio have a history of local damage from the effects of ice damming". RCO 905.1.2 then requires the ice barrier for asphalt shingles and the other listed coverings, consisting of "not fewer than two layers of underlayment cemented together, or a self-adhering polymer-modified bitumen sheet", extending 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", and on slopes of 8 in 12 or steeper not less than 36 inches measured along the slope from the eave edge. The section's own exception covers "Detached accessory structures and roof assemblies terminating at a vertical wall over unconditioned floor areas". Ohio Rev. Code 3781.01(B) lets a city add regulations that do not conflict with the state code; this record did not read Gahanna's own ordinances. About ice & water barrier
Deck & sheathing requirements
SET BY STATE RULE. RCO 905.2.1 (OAC 4101:8-9-01) provides: "Asphalt shingles shall be fastened to solidly sheathed decks." RCO 905.6.1 sets the same rule for slate: "Slate shingles shall be fastened to solidly sheathed roofs." Ohio Rev. Code 3781.01(B) lets a city add regulations that do not conflict with the state code; this record did not read Gahanna's own ordinances.
Sales & use tax
Franklin County: 8.00% combined state and local sales and use tax rate (5.75% state rate plus a 1.25% county permissive rate plus a 1.00% transit rate), per the Ohio Department of Taxation's Sales and Use Tax Rate Map dated September 9, 2026, for rates in effect as of October 2026.

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Sources

Roofing questions: Gahanna, OH

Is ice & water shield required in Gahanna, OH?

Yes. SET BY STATE RULE. Table 301.2(1) of the Residential Code of Ohio (OAC 4101:8-3-01) marks ice barrier underlayment as required, and its footnote h states that "all jurisdictions in Ohio have a history of local damage from the effects of ice damming". RCO 905.1.2 then requires the ice barrier for asphalt shingles and the other listed coverings, consisting of "not fewer than two layers of underlayment cemented together, or a self-adhering polymer-modified bitumen sheet", extending 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", and on slopes of 8 in 12 or steeper not less than 36 inches measured along the slope from the eave edge. The section's own exception covers "Detached accessory structures and roof assemblies terminating at a vertical wall over unconditioned floor areas". Ohio Rev. Code 3781.01(B) lets a city add regulations that do not conflict with the state code; this record did not read Gahanna's own ordinances.

What building code does Gahanna, OH use?

The Residential Code of Ohio (RCO), Ohio Administrative Code Division 4101:8, adopted by the Ohio Board of Building Standards, governs one-, two- and three-family dwellings statewide; its roof assemblies rule (OAC 4101:8-9-01) and administration rule (OAC 4101:8-1-01) carry an effective date of July 1, 2019. Ohio Rev. Code 3781.01(B) provides that the state residential building code "does not prevent a local governing authority from adopting additional regulations governing residential structures that do not conflict with the state residential building code". Under RCO 101.5, where no building department certified by the Board of Building Standards for residential buildings has jurisdiction, "the owner is not required to make submission of construction documents, seek approvals, request inspections, or obtain certificates of occupancy". In Gahanna, the Division of Building issues permits, reviews plans, inspects construction work and enforces building regulations. This record did not read Gahanna's own codified ordinances, so any additional local building regulation is not reflected here.