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2018 IgCC Powered by 189.1

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2018 International Green Construction Code®
Powered by Standard 189.1-2017

A Comprehensive Solution for High-Performance Buildings


The 2018 IgCC®, powered by ANSI/ASHRAE/ICC/USGBC/IES Standard 189.1

  • is a life safety code
  • offers effective useful strategies that provide measurable benefits
  • provides comprehensive green building strategies
  • can be tailored to fit your needs
  • is compatible with local energy codes and LEED®
  • is under continuous maintenance
  • offers tools and resources to help with implementation and adoption

Code officials, project managers, and designers have long recognized the need for a modern, up-to-date code governing the environmental impact of commercial buildings.

The 2018 IgCC has been designed to meet this need through model code regulations that contain clear and specific requirements with provisions that promote safe and sustainable construction. The 2018 IgCC is the first fully integrated edition to be developed cooperatively by ICC and ASHRAE.


This comprehensive green code establishes minimum regulations for building systems and site considerations using prescriptive and performance-related provisions.  This code has been developed in collaboration with the following Cooperating Sponsors, all who recognize the need for the development of a comprehensive set of green regulations that are enforceable, usable and adoptable.

Sponsors us-greenbuild.gif ies.gif  ASHRAE-Logo.jpg   icc.png aialogo_small.png

ASHRAE and partners announce new 2018 IgCC


ASHRAE and its co-sponsors have released a joint web event announcing the release, and provided key technical details to ensure the 2018 IgCC is implemented and adopted for the benefit of all.

For the International Market: Standard 189.1-2017


Standard 189.1 provides total building sustainability guidance for designing, building, and operating high-performance green buildings. From site location to energy use to recycling, this standard sets the foundation for green buildings by addressing site sustainability, water use efficiency, energy efficiency, indoor environmental quality (IEQ), and the building's impact on the atmosphere, materials and resources.

ASHRAE Standard 189.1-2017 is available only outside of United States and Canada.

ANSI/ASHRAE/ICC/USGBC/IES Standard 189.1-2017, Standard for the Design of High-Performance Green Buildings
2018 | 156 pages

Have a question about the 2018-IgCC or Standard 189.1?

Email standards.section@ashrae.org or call 404-636-8400 and ask for Emily Toto, Assistant Manager of Standards - Codes.

If you wish to request a formal technical interpretation from SSPC 189.1, instructions can be found here.

Previous Versions of Standad 189.1

You can still purchase earlier versions of Standard 189.1 through the ASHRAE Online Bookstore.

Standard 189.1-2014

Standard 189.1-2011

Standard 189.1-2009

Related Links

Related Courses

Advanced High-Performance Building Design

How Smart, Efficient, Sustainable Systems Lead to Improved Resilience

IgCC and ASHRAE Standard 189.1 Technical Provisions

Implementing Standard 189.1-2011 for High-Performance Green Buildings – 6 hours

Implementing Standard 189.1-2014 for High-Performance Green Buildings – 6 hours

Understanding Standard 189.1-2011 for High-Performance Green Buildings

Understanding Standard 189.1-2014 for High-Performance Green Buildings