Getting Started

COMcheck-Web is accessible directly from the website without having to download and install.

COMcheck™ Desktop for Windows® may be downloaded and installed directly to your desktop.

  • Download via the link at the bottom of the right sidebar.
  • See if your state or county can use COMcheck to show compliance.
  • View a list of supported software versions for code compliance tools.

Future update notice:  We are in the process of adding the 2021 IECC to COMcheck-Web and anticipate that it will be available the first quarter of 2022.  Note that it will not be added to COMcheck Desktop - all Codes moving forward will be added to COMcheck-Web as the Desktop version will eventually become unsupported.  We generally recommend that users use Standard 90.1-2019 (which is available in COMcheck-Web now) until the 2021 IECC becomes available - if that would be acceptable in your jurisdiction.

Commercial Compliance Using COMcheck

The COMcheck software product group makes it easy for architects, builders, designers, and contractors to determine whether new commercial or high-rise residential buildings, additions, and alterations meet the requirements of the IECC and ASHRAE Standard 90.1, as well as several state-specific codes. COMcheck also simplifies compliance for building officials, plan checkers, and inspectors by allowing them to quickly determine if a building project meets the code.

COMcheck Support

Have a compliance question or need assistance with the software?

BECP's team of building energy codes experts is available to answer specific questions submitted through our web-based help desk.

Technical Support Document for Version 3.9.1 of the COMcheck Software


Updates to REScheck and COMcheck Building Energy Code Compliance Software

The U.S. Department of Energy (DOE) is directed to provide technical assistance to states to support the implementation of model residential and commercial building energy codes (42 USC 6833). As part of this assistance, the DOE Building Energy Codes Program provides ongoing support for REScheck and COMcheck compliance software, which are updated based on new editions of the model codes. DOE has published guidance surrounding its support for the software, including technical assistance requests for modified versions.

Latest Release

comcheck logo

Desktop Version

Desktop Version/Build:
Platform: Windows
Release Date:

Release Notes

Version addresses the following:

  • Removes support for Massachusetts energy code
  • Revises fenestration and checklist requirements for 2020 New York City Energy Conservation Code (NYCECC)
  • Restricts New York State (NYECCC) projects created in COMcheckWeb from opening
  • Upgrades the Log4J library files to address security issues with older version of these libraries
  • Modifies the window/wall calculations so that opaque doors areas are correctly considered

COMcheck Desktop 4.1.5 Supported Codes:

2009, 2012, 2015 and 2018 IECC; ASHRAE Standard 90.1-2007, 2010, 2013, 2016; Various state-developed energy codes including: Colorado (Boulder and Denver), New York City (NYCECC), NYStretch, Vermont; as well as Ontario and Puerto Rico.

COMcheck-Web Supported Codes:

2009, 2012, 2015 and 2018 IECC; ASHRAE Standard 90.1-2007, 2010, 2013, 2016, 2019; Various state-developed energy codes including: Colorado (Boulder and Denver), District of Columbia, Florida, Massachusetts, New York City (NYCECC), New York State (NYECCC), NYStretch, Vermont; as well as Ontario and Puerto Rico.

2021 IECC - expected first quarter 2022.