Consultation on the 2025 National Construction Codes (Nov-Dec 2023)

ERO number
Notice type
Building Code Act, 1992, S.O. 1992, c. 23
Posted by
Ministry of Municipal Affairs and Housing
Notice stage
Proposal posted
Comment period
November 3, 2023 - December 18, 2023 (45 days) Closed
Last updated

This consultation was open from:

November 3, 2023
to December 18, 2023

Proposal summary

The Canadian Board for Harmonized Construction Codes is consulting on proposed changes for the 2025 National Construction Codes, some of which may affect the environment. Working towards increased code harmonization, we encourage people to provide feedback as we consider the proposals for potential inclusion in the Ontario’s 2026/27 Building Code.

Proposal details

Ontario's Building Code is a regulation under the Building Code Act, 1992 which sets out minimum administrative and technical requirements for new construction, renovation, and change of use of buildings. New editions or major amendments to Ontario's Building Code are generally released every five years to coincide with updates to the National Construction Codes.

As part of the development process for the edition of Ontario's Building Code (i.e., 2026/2027) that will follow the 2025 National Building Code, the Ministry will be using National's public consultations as a primary vehicle to engage stakeholders and an opportunity to receive industry feedback on the 2025 National Codes. The National Research Council will share comments received from Ontario with the Ministry of Municipal Affairs and Housing.

The next and future editions of Ontario's Building Code are an important step in the process to support increased harmonization with National Construction Codes. Approximately 60% of Ontario's Code is currently consistent with the National Construction Codes.

There are several public reviews being held for the 2025 National Construction Codes. The first public review ended on December 23, 2022. The next in the series, this one, began on October 24, 2023, and will end on December 18, 2023:

It is critical that Ontario's industry partners participate in these national consultations as they are Ontario's principal mechanism for consultation on Ontario's 2026/2027 Building Code.

Please use the link to the National Public Review found below to submit your comments:

There are no new administrative costs anticipated for regulated entities as there is no change to current requirements to comply with Ontario’s Building Code.

Supporting materials

View materials in person

Some supporting materials may not be available online. If this is the case, you can request to view the materials in person.

Get in touch with the office listed below to find out if materials are available.

Building and Development Branch

12th Flr, 777 Bay St,
Toronto, ON
M7A 2J3

Office phone number


Commenting is now closed.

The comment period was from November 3, 2023
to December 18, 2023

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Building and Development Branch

Phone number
Email address
Building and Development Branch

12th Flr, 777 Bay St,
Toronto, ON
M7A 2J3

Office phone number

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