At its meeting on May 26, 2017, the Board of Building Standards adopted updates to the Ohio Building, Plumbing and Mechanical Codes based on 2015 I-Codes effective November 1, 2017.

The Board initiated the rule change process in October 2016 and the rules have been available in draft form on the Board’s website.  The final adopted rules with summaries can be found at the following links:

Ohio Building Code (OBC) Rules:

Ohio Plumbing Code (OPC) Rules:

Ohio Mechanical Code (OMC) Rules:

Any non-residential project submitted to a building department on or after November 1, 2017 shall comply with the above rules.  Any non-residential project submitted before November 1, 2017 shall comply with the current Ohio Building, Plumbing & Mechanical Codes based on the 2009 I-Codes as amended.  These rules can be found here:

The Residential Code of Ohio (RCO) which regulates 1-, 2- & 3- Family dwellings is not affected by these code updates.  The RCO remains based on the 2009 International Residential Code (IRC) as amended.  The Residential Construction Advisory Committee and the Board continue to review newer editions of the IRC for possible adoption at a later date.

If you have questions related to these amendments, please contact the Board Office at (614) 644-2613 or