Chapter 3 Interpretation: 2020 NGBS Accessory Structures

Published Tuesday, January 23, 2024

The 2020 NGBS Scope and Administration allows for the certification of "Accessory Structures." In the 2020 NGBS Definitions section, the Accessory Structure definition aligns with the ICC International Building Code (IBC) and the ICC International Residential Code (IRC), but also confers the Adopting Entity flexibility in what buildings are treated as accessory. 

The 2020 NGBS Green VRG Part I sets out the Conformance Criteria for Accessory Structures. In short, it allows Accessory Structures to attain a conforming designation if compliant with NGBS criteria. 

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