National Building Code of Canada Volume 1 2025 National Building Code of Canada Volume 1 2025 ----------------Page (0) Break---------------- ----------------Page (1) Break---------------- © His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2025 © Sa Majesté le Roi du chef du Canada, représenté par le Conseil national de recherches du Canada, 2025 National Building Code of Canada 2025 Volume 1 Developed by the Canadian Board for Harmonized Construction Codes Published by the National Research Council of Canada ----------------Page (2) Break---------------- © His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2025 © Sa Majesté le Roi du chef du Canada, représenté par le Conseil national de recherches du Canada, 2025 First Edition 1941 Second Edition 1953 Third Edition 1960 Fourth Edition 1965 Fifth Edition 1970 Sixth Edition 1975 Seventh Edition 1977 Eighth Edition 1980 Ninth Edition 1985 Tenth Edition 1990 Eleventh Edition 1995 Twelfth Edition 2005 Thirteenth Edition 2010 Fourteenth Edition 2015 Fifteenth Edition 2020 Sixteenth Edition 2025 NRCC-CONST-56759E © His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2025 Paper: ISBN 978-0-660-76991-2 Cat. No. NR24-28/2025E PDF: ISBN 978-0-660-76990-5 C at. No. NR24-28/2025E-PDF Printed in Canada First Printing Aussi disponible en français : Code national du bâtiment – Canada 2025 NRCC-CONST-56759F Papier : ISBN 978-0-660-76993-6 PDF : ISBN 978-0-660-76992-9 ----------------Page (3) Break---------------- © His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2025 © Sa Majesté le Roi du chef du Canada, représenté par le Conseil national de recherches du Canada, 2025 Table of Contents Volume 1 Preface Relationship of the NBC to Standards Development and Conformity Assessment Canadian Commission on Building and Fire Codes and Standing Committees Division A Compliance, Objectives and Functional Statements Part 1 Compliance Part 2 Objectives Part 3 Functional Statements Division B Acceptable Solutions Part 1 General Part 2 Farm Buildings Part 3 Fire Protection, Occupant Safety and Accessibility Part 4 Structural Design Part 5 Environmental Separation Part 6 Heating, Ventilating and Air-conditioning Part 7 Plumbing Services Part 8 Safety Measures at Construction and Demolition Sites Appendix C Climatic and Seismic Information Appendix D Fire-Performance Ratings Division C Administrative Provisions Part 1 General Part 2 Administrative Provisions Index Volume 2 Division B Acceptable Solutions Part 9 Housing and Small Buildings Part 10 Alteration of Existing Buildings Index National Building Code of Canada 2025 Volume 1 ----------------Page (4) Break---------------- © His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2025 © Sa Majesté le Roi du chef du Canada, représenté par le Conseil national de recherches du Canada, 2025 National Building Code of Canada 2025 Volume 1 ----------------Page (5) Break---------------- © His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2025 © Sa Majesté le Roi du chef du Canada, représenté par le Conseil national de recherches du Canada, 2025 Preface The National Building Code of Canada (NBC) is one of the five National Model Codes, along with the National Plumbing Code of Canada (NPC), the National Fire Code of Canada (NFC), the National Energy Code of Canada for Buildings (NECB) and the National Farm Building Code of Canada (last updated in 1995). In Canad a, provincial and territorial governments have the authority to enact legislation that regul ates building design and construction within their jurisdictions. This legislation may involve the adoption of the NBC without change or with modifications to suit local needs, and the enactment of other laws and regulations regarding building design and construction. Persons involved in the design or construction of a building should consult the provincial or territorial jurisdiction concerned to confirm what requirements are applicable. Development of the National Model Codes The national code development system unde rwent a governance change in November 2022 to support efforts to harmonize construction codes throughout Canada. As part of this change, the Canadian Commission on Building and Fire Codes (CCBFC), which had been responsible for managing the code development system, and the Provincial/Territorial Advisory Committee on Codes (PTPACC), which had previously advised the CCBFC on policy matters, were dissolved. TheCanadianBoardforHarmonizedConstructionCodes(CBHCC),whichismadeupof representatives from provincial, territorial and federal government departments, assumed responsibility for developing, approving and maintaining the National Model Codes (also referred to as the “Codes”). The 2025 National Model Codes were finalized by the CBHCC, building on the work of the CCBFC. The CBHCC is overseen by the Canadian Table for Harmonized Construction Code Policy (CTHCCP), which sets the strategic direction for code development. The CTHCCP is made up of provincial, territorial and federal deputy ministers (or equivalent representatives). The CBHCC receives advice on policy and imp lementation related to the National Model Codes from the Advisory Council for Harmonized Construction Codes (ACHCC). The ACHCC consists of individuals from a range of national member organizations representing an interest in the regulation of building construction and operation. The development of Codes content is a consensus-based process that relies on volunteers who participate on code development committees and on input from the construction sector, other interested organizations and the public. Codes Canada staff within the Construction Res earch Centre at the National Research Council of Canada (NRC) provide technical, administrative and policy support to the CBHCC and its code development committees. The NRC publishes the National Model Codes. More information on the code development system, including how to request changes to the Codes and how to participate, is available on th e CBHCC's website at https://cbhcc-cchcc.ca. National Building Code of Canada 2025 Volume 1