Dayton, Ohio Building Codes

Updated : 05/30/2024

Overview

The State of Ohio adopts and enforces a set of statewide mandatory construction codes. The building codes are strictly mandated throughout the state; however, local jurisdictions may adopt additional more stringent provisions so long as they are not in conflict with the state code. Ohio Rev. Code Ann. § 3781.01(A). Furthermore, jurisdictions may seek variances from the state for certain provisions that are in conflict with the code yet are deemed necessary to secure the health and safety within the local governing authority’s jurisdiction. Id.(C)(2)(b).

Dayton, Ohio, adopted the 2019 Ohio Residential Code (based on the 2018 International Residential Code). Dayton, OH, Muni. Code § 153.01 (adoption), § 153.03 (amendments), and Ohio Admin. Code § 4101.8. Dayton, Ohio, adopted the 2024 Ohio Building Code (based on the 2021 International Building Code). Dayton, OH, Muni. Code Dayton, OH, Muni. Code § 153.01 (adoption), § 153.02 (amendments), and Ohio Admin. Code § 4101.1. Dayton, Ohio, adopted the 2024 Ohio Existing Building Code (based on the 2021 International Existing Building Code). Dayton, OH, Muni. Code § 153.01 (adoption) and Ohio Admin. Code § 4101:1-34-01 (adoption and amendments). 

Helpful resources for Dayton, Ohio include the following.

Residential Building Code

Ohio adopted a statewide mandatory residential code that will control; however, local governments are free to make laws more strict (with some limitations).See PLRB, Ohio Building Codes for more information on state level codes.

Dayton adopted the 2018 IRC, locally. Note that adoptions usually come with amendments. So, it is important to review those amendments in addition to the unamended model code.

You can find a copy of the model code here.

You can find information about the adoption without amendment to the model code here.

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2019 Residential Code of Ohio (2018 IRC)(Dayton, OH Sec. 153.04. - General provisions of the Unified Building Code.)

...Sections 153.04 to 153.99, inclusive, shall apply to both the Ohio Building Code and the 1999 Ohio Residential Code for One, Two and Three Family Dwellings as adopted by Section 153.01. Further, such Sections shall be controlling when in conflict with any of the adopted provisions of the Ohio Building Code or the 1999 Ohio Residential Code for One, Two and...

Drip Edge

Drip Edge: No

Ice Barrier

Are ice barriers required for Dayton ? Yes
Citation: Ohio Admin. Code 4101.8-3 - 301.2(1) (Design criteria)
Municipal Code https://codes.ohio.gov/oac/4101:8-3-01v1
Comments:

Ohio completed Table 301.2(1), Climatic and Geographic Design Criteria, and indicated that ice barriers are required. Ohio Admin. Code § 4101.8-3-01, Table 301.2(1).

Government Officials
Last Name First Name Title E-mail Phone Note
Adams Scott Chief Building Official scott.adams@daytonohio.gov 937-333-3911
Eifert Robert Chief Building Inspector 937-333-3997

Comments

The State of Ohio adopts and enforces a set of statewide mandatory construction codes. The building codes are strictly mandated throughout the state; however, local jurisdictions may adopt additional more stringent provisions so long as they are not in conflict with the state code. Ohio Rev. Code Ann. § 3781.01(A). Furthermore, jurisdictions may seek variances from the state for certain provisions that are in conflict with the code yet are deemed necessary to secure the health and safety within the local governing authority’s jurisdiction. Id.(C)(2)(b).

Dayton, Ohio, adopted the 2019 Ohio Residential Code (based on the 2018 International Residential Code). Dayton, OH, Muni. Code § 153.01 (adoption), § 153.03 (amendments), and Ohio Admin. Code § 4101.8.

State amendments modify the drip-edge provision of the IRC to no longer explicitly require drip-edges, referring instead to sections. 903.1 and 905.1, which require installing roof coverings in accordance with the approved manufacturer’s installation instructions. Ohio Admin. Code § 4101:8-9-01 §§ 905.2.85, 903.1, and 905.1.

Existing Buildings

Existing buildings, meaning buildings that were built in accordance to code at the time of construction, typically merit extra consideration in a current updated code.

The State of Ohio adopts and enforces a set of statewide mandatory construction codes. The building codes are strictly mandated throughout the state; however, local jurisdictions may adopt additional more stringent provisions so long as they are not in conflict with the state code. Ohio Rev. Code Ann. § 3781.01(A). Furthermore, jurisdictions may seek variances from the state for certain provisions that are in conflict with the code yet are deemed necessary to secure the health and safety within the local governing authority’s jurisdiction. Id.(C)(2)(b).

No adoption of Appendix J was found in the municipal code or city ordinances

Dayton, Ohio, adopted the 2024 Ohio Existing Building Code (based on the 2021 International Existing Building Code). Dayton, OH, Muni. Code § 153.01 (adoption) and Ohio Admin. Code § 4101:1-34-01 (adoption and amendments). 

Commercial Building Code

Dayton adopted the 2021 IBC, locally. Note that adoptions usually come with amendments. So, it is important to review those amendments in addition to the unamended model code.

You can find a copy of the code here.You can find information about the adoption without amendment to the model code here.

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2024 Ohio Building Code (2021 IBC)(Dayton, OH Sec. 153.01. - Adoption of the Unified Building Code.)

...The building code adopted by this chapter may be referred to as the Unified Building Code. It shall consist of the following: (1) All of the provisions of the Ohio Building Code, including all amendments hereafter...

Comments

The State of Ohio adopts and enforces a set of statewide mandatory construction codes. The building codes are strictly mandated throughout the state; however, local jurisdictions may adopt additional more stringent provisions so long as they are not in conflict with the state code. Ohio Rev. Code Ann. § 3781.01(A). Furthermore, jurisdictions may seek variances from the state for certain provisions that are in conflict with the code yet are deemed necessary to secure the health and safety within the local governing authority’s jurisdiction. Id.(C)(2)(b).

Dayton, Ohio, adopted the 2024 Ohio Building Code (based on the 2021 International Building Code). Dayton, OH, Muni. Code Dayton, OH, Muni. Code § 153.01 (adoption), § 153.02 (amendments), and Ohio Admin. Code § 4101.1.

Existing Buildings

The State of Ohio adopts and enforces a set of statewide mandatory construction codes. The building codes are strictly mandated throughout the state; however, local jurisdictions may adopt additional more stringent provisions so long as they are not in conflict with the state code. Ohio Rev. Code Ann. § 3781.01(A). Furthermore, jurisdictions may seek variances from the state for certain provisions that are in conflict with the code yet are deemed necessary to secure the health and safety within the local governing authority’s jurisdiction. Id.(C)(2)(b).

Dayton, Ohio, adopted the 2024 Ohio Existing Building Code (based on the 2021 International Existing Building Code). Dayton, OH, Muni. Code § 153.01 (adoption) and Ohio Admin. Code § 4101:1-34-01 (adoption and amendments). 

Other Building Codes

Ohio’s building codes contain references to other codes that are applicable as references in limited scope as specified by the building or residential codes. These codes include:

Dayton, OH, Muni. Code § 153.01 (adoption).

  • The National Electrical Code (NFPA 70).