Current Commercial Code

This code is mandatory statewide for the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, maintenance, removal and demolition of buildings under its purview. The OBC is generally applicable to construction that is not detached one-, two-, or three-family dwellings.
2024 Ohio Building Code
Adoption Info
Official title
2024 Ohio Building Code (OBC)
Overview
The 2024 Ohio Building Code is based on the 2021 International Building Code (IBC) with Ohio-specific amendments. It sets the minimum requirements for building design, construction, and safety in commercial buildings within the state of Ohio. This code ensures that commercial structures are built to provide safety, public health, and general welfare through structural strength, means of egress, stability, sanitation, light and ventilation, energy conservation, and safety to life and property from fire and other hazards attributed to the built environment.
Ohio Building Codes 2017Â
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2019 Residential Code of Ohio
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2024 Existing Building Code
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Ohio Plumbing Code 2024
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Ohio Mechanical Code 2024
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Ohio Fuel Gas Code 2021
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Ohio Energy Code 2021
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Ohio Storm Shelter Code 2020
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Ohio Accessibility Code 2017
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2010 ADA Standards
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Ohio Electrical Code 2023
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Ohio Fire Sprinkler Code 2022
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Ohio One- and Two-Family Dwelling Fire Sprinkler Installation Code 2022
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Ohio Low-rise Residential Fire Sprinkler Installation Code 2022
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Ohio LP Gas Code 2020
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Ohio Fire Alarm Code 2022
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Ohio Fire Wall Code 2021
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Ohio Stationary Fuel Cell Power Code 2020
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Ohio Commercial Energy Code 2019
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Ohio Commercial HVAC Inspection and Maintenance Code 2018
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Ohio Elevator and Escalator Code 2016
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Ohio Existing Elevator and Escalator Code 2015
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Ohio Wind Turbine Tower Elevator Code 2016
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Ohio Platform Lift and Stairway Chairlift Code 2014
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Ohio Belt Manlift Code 2015
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Ohio Solder Joint Pressure Fitting Code for Cast Copper Alloy 2018
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Ohio Solder Joint Pressure Fitting Code for Wrought Copper and Copper Alloy 2018
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Ohio Conveyor and Related Equipment Code 2018
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Ohio Building Services Piping Code 2020
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Ohio Concrete Construction Tolerance Code 2010
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Ohio Concrete Construction Tolerance Code 2010
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Ohio Concrete Thin Shells Code 2019
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Ohio Post-Installed Mechanical Anchors in Concrete Code 2019
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Ohio Post-Installed Adhesive Anchors in Concrete Code 2011
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Ohio Special Unbonded Post-Tensioned Precast Structural Walls Code, 2007
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Ohio Precast Concrete Tolerances Code, 2009
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Ohio Seismic Steel Construction Code 2016
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Ohio Prequalified Moment Frame Connection Code 2016 w/ Supplement 1-2018
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Ohio Steel Construction Code 2016
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Ohio Wood Construction Wind and Seismic Code 2021
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Ohio Joists and Rafters Span Tables Code 2021
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Ohio Masonry Specification Code 2016
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Ohio Peak Cooling and Heating Calculation Code (Commercial / Mid & High-rise Residential) 2007 (R2014)
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ABA Standards 2015
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Ohio Typical Timber Construction Details Code 2003
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Ohio Structural Glued Laminated Timber Appearance Grades Code 2001
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Ohio Structural Glued Laminated Timber Dimensions Code 2010
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Ohio Structural Glued Laminated Timber of Hardwood Species Specifications Code 1996
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OhioPower Assist and Low Energy Power Operated Doors Code 2019
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Emergency Eyewash and Shower Equipment Code 2014
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Ohio Metal and Flexible Duct Code 2020
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Ohio Phenolic Duct Construction Code 2015
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Ohio Carbon Structural Steel Code, 2014
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Ohio Welded and Seamless Steel Pipe Piles Code, 2010 (R2018)
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Ohio Deformed and Plain Carbon-steel Bars for Concrete Reinforcement Code 2015ae1
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Ohio Steel Sheet, Zinc-Coated Galvanized or Zinc-Iron Alloy-Coated Galvannealed by the Hot-Dip Process Code, 2017
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Ohio High-strength Low-alloy Piling with Atmospheric Corrosion Resistance for Use in Marine Environments Code, 2013 (2018)
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Ohio Low-Alloy Steel Deformed and Plain Bars for Concrete Reinforcement Code 2016
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Ohio High-strength Steel Bars for Prestressed Concrete Code 2018
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Ohio Steel Sheet, Zinc-5 Percent, Aluminum Alloy-Coated by the Hot-Dip Process Code 2013
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Ohio Aluminum and Aluminum Alloy Steel and Plate Code 2014
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Ohio Fair Housing Act Design Manual
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OSHA 1926 Construction
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OSHA 1910 Occupational Safety and Health Standards
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OSHA 1904 Recordkeeping
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Ohio Round Industrial Duct Construction Standards, 2013
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Ohio Rolled Structural Steel Bars, Plates, Shapes and Sheet Piling Code, 2017
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Ohio Chimneys, Fireplaces, Vents and Solid Fuel-burning Appliances Code 2019
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Ohio Masonry Code 2016
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Ohio High-Strength Low-Alloy Structural Steel with Atmospheric Corrosion Resistance Code 2015
Current Residential Code
This code is mandatory statewide for the construction, alteration, movement, enlargement, replacement, repair, equipment, use and occupancy, location, maintenance, removal, and demolition of every one-, two-, or three-family dwelling.
Climate Zones: 4A, 5A
Code Adoption and Change Process
- Proposal Submission:
- Stakeholders, including architects, engineers, builders, trade associations, government officials, and the public, can propose changes to the building codes. Proposals are typically submitted during a designated window period.
- Initial Review:
- The OBBS staff reviews the proposals for completeness and relevance. Proposals that meet the initial criteria are forwarded to the appropriate committee for further consideration.
- Committee Review:
- Technical Advisory Committees (TACs), composed of experts in specific areas like plumbing, electrical, or mechanical systems, review the proposals. These committees evaluate the technical merits and implications of the proposals.
- The committees may hold public meetings where proponents and other interested parties can discuss and provide additional information about the proposed changes.
- Public Comment and Hearings:
- After the committee review, the OBBS publishes the proposed changes and opens them for public comment. This period allows the public and industry stakeholders to submit written comments or express concerns.
- Public hearings may be scheduled to gather more extensive feedback and discuss the proposed changes in a public forum.
- Recommendations and Modifications:
- Based on the feedback and discussions during the public comment period and hearings, the TACs may revise the proposals. They then submit their recommendations to the full Board of Building Standards.
- Board Review and Decision:
- The full Board of Building Standards reviews the committee recommendations and public inputs. The board then votes on whether to adopt the proposed changes.
- If approved, the changes are finalized and integrated into the Ohio Building Code.
- Filing and Publication:
- The approved changes are filed with the Secretary of State and published. There is typically a lead time between the publication and the effective date of the new regulations, allowing the industry to adapt to the new standards.
- Implementation:
- The new or revised codes become effective on the specified date. The OBBS often provides training sessions and resources to help stakeholders understand and comply with the new regulations.
Code Change Cycle
2022: Assessment and Initial Review
- Activities: Review and analysis of the 2021 ICC model codes.
- Stakeholder Engagement: Initial feedback sessions with industry professionals, public agencies, and other stakeholders.
2023: Development and Proposal Submission
- Proposal Submission: Open call for proposals based on the new model codes and specific needs identified within Oregon.
- Review by Committees: Technical committees begin evaluating proposals for technical merit and applicability.
Next Code Update
2024: Public Review and Final Decisions
- Public Comment: Proposed changes are published for public review and comment.
- Public Hearings: Hearings are held to discuss detailed implications of proposals and gather further input.
- Finalization of Changes: Regulatory bodies review committee recommendations and public input, then make final decisions on code adoption.
2025: Adoption and Implementation
- Adoption: Approved changes are formally adopted and published.
- Effective Date: New or revised codes become effective, typically at the beginning of the year.
- Education and Transition: Training and educational programs are offered to help implement the new codes effectively.
2026 and Beyond: Monitoring and Preparations for Next Cycle
- Ongoing Evaluation: Continuous monitoring of the implementation of the new codes to identify any issues or further amendments.
- Early Preparations: Start preparations for the next cycle based on the upcoming ICC code updates expected in 2024.
Next Code Update
History
January 21, 2011The Ohio BBS approves a set of amendments to update the state’s construction codes. Part D would update the Ohio Building Code (OBC) to incorporate the 2009 International Building Code (IBC), including its references to the 2009 IECC and ASHRAE 90.1-2007 as compliance paths for energy efficiency for non-residential buildings. The OBC currently references the 2006 IBC.
| July 1, 1979 | Rule Adoption | The Ohio Board of Building Standards repeals most of the existing Ohio Building Code, adopting a collection of model code sections and superseding Ohio provisions, including the CABO Model Energy Code (MEC). |
| March 1, 1998 | MEC Adoption | The 1995 MEC is adopted and becomes effective statewide. |
| July 1, 1995 | Energy Code Implementation | The 1993 MEC and ASHRAE 90.1-1989 go into effect, enhancing energy conservation measures. |
| March 1, 2005 | Energy Code Update | The 2003 IECC is adopted and becomes effective. |
| January 1, 2008 | 2008 Ohio Building Code Implementation | The 2008 Ohio Building Code (OBC) based on the 2006 IBC goes into effect, referencing the 2006 IECC and ASHRAE 90.1-2004 as compliance paths. |
| January 1, 2009 | Adoption of 2006 IECC | BBS adopts the 2006 IECC for the second time with additional compliance options for residential buildings. |
| March 7, 2011 | JCARR Approval | JCARR approves updates to Ohio’s nonresidential energy standards, effective November 1, 2011. |
| May 11, 2011 | Alternative Energy Code Approval | The Residential Codes Advisory Committee approves the OHBA Residential Alternative Energy Code for the next edition of the ORC. |
| November 1, 2011 | Code Updates | Updates to the OBC, Ohio Mechanical Code, and Ohio Plumbing Code become effective. |
| May 28, 2012 | RCO Update | Updates the RCO to reference the 2009 IECC with state-developed alternative compliance paths, raising insulation requirements and energy efficiency standards. |
| January 1, 2013 | 2013 RCO Implementation | The 2013 Residential Code of Ohio becomes effective, governing new and renovated residential construction. |
| September 30, 2016 | Amendments Group 92 Adoption | The Ohio Board of Building Standards adopts rule changes to OBC Chapter 13, focusing on energy efficiency, effective January 1, 2017. |
Contacts
Deborah D. Ohler, PE
Staff Engineer
Board of Building and Standards
Ohio Department of Commerce
Email: debbie.ohler@com.state.oh.us
Steven P. Regoli, AIA
Architect Project Administrator
Board of Building and Standards
Ohio Department of Commerce
Email: steven.regoli@com.state.oh.us
Isaac Elnecave
Senior Policy Manager
Midwest Energy Efficiency Alliance (MEEA)
Email: ielnecave@mwalliance.org
News and Events
- A Tale of Bright Highs and Dark Lows: The State of Energy Efficiency in the Midwest August 11, 2014
- The Energy Code Ambassador Program: A Network Of Peer-To-Peer Support April 16, 2014
- New and Improved Energy Code Ambassador Program Launched In Ohio September 20, 2013
BCAP Projects
Compliance Planning Assistance
Energy Code Ambassadors Program
BCAP Resources
Helpful Links

Cosimina has been a member of BCAP for over a decade, actively contributing to the organization’s nationally acclaimed initiatives aimed at assisting states and local authorities in the establishment and enforcement of robust and efficient building energy codes. Her involvement spans across advocacy, technical guidance, outreach programs, and the formation of strategic coalitions.