2015 International Green Construction Code (IgCC) Development

The International Green Construction Code (IgCC) is an effort of the International Code Council (ICC) aimed at creating a new green overlay code for the ICC’s suite of I-Codes.  The IgCC includes requirements for a range of issues pertinent to sustainability, including a substantial portion dedicated to energy efficiency.As an “overlay” code, the IgCC works in combination with other underlying codes including the 2015 International Energy Conservation Code and the entire suite of I-Codes.

Development of the 2015 International Green Conservation Code (IgCC) is well underway with a number of important proposals beinIgCC logog supported by New Buildings Institute (NBI) and various partners. The Final Action Hearings have concluded with the last step being  electronic voting through October 29.

Below is a summary of NBI's top priorities for voting members of the ICC. These proposals represent fundamental tools that will help jurisdictions meet their energy goals and offer model code language for adopting into city codes now. Proposal references and recommended votes for all of the tools can be found at the links below.

The factsheet available here outlines our voting recommendations.


Tool 1 | Outcome-Based Compliance

Energy codes offer two primary pathways to demonstrate required energy savings: modeled and prescriptive. Adoption of the outcome-based compliance proposal would provide an additional compliance path and alternative to prescriptive or modeled performance energy compliance in the 2015 IgCC. This proposal will help facilitate innovation in design and greatly simplify the task of verifying code compliance. Read More


Tool 2 | Cool Roofs

Votes on several proposals will determine whether the IgCC helps to lead the way for urban heat island mitigation and reflective/cool surface performance or continue to lag the marketplace. Together, these proposals improve the code language, provide a reasonable stretch reflectivity performance target that is in line with other green codes, extend reflectivity requirements into climate zones 4a and 4b where cool roofs are already thriving in the marketplace and required in several big cities. Read More


Tool 3 | Renewable Energy

Over the past several years, onsite renewable energy systems have been evolving and are being deployed at an increasing rate that exceeds the ability of construction codes to keep pace. The 2015 International Code Council family of codes is addressing this need by updating and coordinating enforceable code requirements for the safe installation of onsite renewable energy systems. The last step is the IgCC proposal adoption of GEW-133-4 that will clarify requirements for onsite renewable energy systems and renewable energy credits and make them consistent with other I-Codes. Read More


Tool 4 | Demand Response

Demand response (DR) refers to the ability to adjust energy use in response to a price or information signal from a grid operator or other automated source. It enables energy efficiency to be dynamically dispatched, thus lowering costs and increasing reliability, particularly during peak demand periods. Three proposed modifications to the IgCC would increase the effectiveness of existing demand response provisions and lead to more buildings with demand-response capabilities. GEW 54-14 proposes to comprehensively revise the DR provisions in the IgCC to reflect language in OpenADR and other codes and GEW 58-14 would expand the scope of demand response applicability to more jurisdictions. Read More

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