Vermont publishes an update to their Comprehensive Energy Plan, which provides a framework for advancing energy efficiency and clean energy goals in the state.

The RBES and CBES are both updated. The new residential code includes the 2015 IECC. The 2015 CBES is a standalone document for the State of Vermont based upon amendments to the 2015 IECC. The CBES also allows an alternative compliance path of ASHRAE 90.1-2013 with some Vermont specific requirements outlined in the energy code handbook. CBES applies to all new commercial construction, including additions, alterations, renovations, and repairs. Revisions are to take effect March 1, 2015 and “shall apply to construction commenced on and after the date they become effective”. RBES applies to all new residential construction, including additions, alterations, renovations, and repairs.

The Vermont legislature adopts Act 89, which clarifies the applicability of Vermont’s residential (and commercial) building energy codes to mixed-use buildings and includes various amendments to promote compliance with those codes, such as using existing State and local permit processes to encourage compliance.

The Vermont Department of Public Service (DPS) develops a statewide energy code compliance plan, which will outline a realistic approach for achieving 90 percent compliance with the new Residential and Commercial Energy Codes by February 1, 2017.

DPS officially updates the 2011 Vermont CBES to reference the 2009 IECC and ASHRAE 90.1-2007 with several strengthening amendments from the 2012 IECC (the current 2005 CBES is based on the 2000 IECC and ASHRAE 90.1-2004). The revisions are to effect January 3, 2012 and will apply to all commercial construction, including alterations, renovations, repairs, and additions.

DPS updates the 2011 RBES to reference the 2009 IECC with several strengthening amendments from the 2012 IECC. As directed by Vermont Act 45 of 2009, DPS approved the new code in January, and the Vermont Legislative Committee on Administrative Rules (LCAR) approved it in June. The revisions take effect October 1, 2011 and apply to all new residential construction, including alterations, renovations, repairs, and additions larger than 500 square feet. These revisions take effect on January 3, 2012. Free trainings on the 2011 RBES are being developed by Efficiency Vermont. The current 2005 RBES is based on the 2000 IECC.

The state legislature passes the Vermont Energy Act of 2009, which directs the Commissioner of the DPS to adopt the 2009 IECC and ASHRAE 90.1-2007 as well as to develop a plan to achieve compliance with these codes in 90% of new building space within eight years, as directed by the American Recovery and Reinvestment Act (ARRA). Every three years after that date, the Department of Public Service shall update the residential and commercial codes to incorporate the most recent versions of the IECC and ASHRAE Standard 90.1, with an effective date within three months of final adoption.

The bill directs the Department of Public Service to complete rulemaking on the adoption of the 2009 IECC for residential buildings (new construction and renovations of more than 500 square feet) and either the 2009 IECC or ASHRAE 90.1-2007 for commercial buildings by January 1, 2011, effective immediately upon final adoption.

By September 1, 2011, the Commissioner must issue a plan to achieve 90% compliance by February 1, 2017. The Commissioner must also establish training and enforcement programs as well as a system to annually measure the compliance rate by June 30, 2012.

The 2005 CBES, based on the 2000 IECC and ASHRAE Standard 90.1-2004, becomes effective.

2005 Vermont Guidelines For Energy Efficient Commercial Construction

The Commercial Building Energy Standards (CBES) is enacted into law (21 V.S.A. § 268) as the energy code for all commercial buildings and residential buildings four stories or more above grade in Vermont.

Vermont publishes its IECC-based 2001 Vermont Guidelines for Energy Efficient Commercial Construction in October 2001. The 2001 Commercial Guidelines incorporate ASHRAE Standard 90.1-1999 and a number of Vermont-specific amendments.

The 2005 RBES edition, based on the 2000 IECC, becomes effective.

The State of Vermont enacts the Vermont Residential Building Energy Standards (RBES), a statewide residential energy code based on the 1995 CABO/MEC and Vermont amendments to the 2000 IECC. It becomes effective July 1, 1998 and applies to virtually all new residential construction.

The following buildings are exempt from both the technical and the certification requirements of the Vermont Energy Code:

• Existing buildings for which construction commenced before July 1, 1998.
• Act 250 projects permitted before July 1, 1997.
• Commercial buildings or portions classified as commercial or high-rise residential. (A residential portion of a mixed-use building must meet the Energy Code.)
• Mobile homes subject to Title VI of the National Manufactured Housing Construction & Safety Standards Act of 1974 (i.e., single- and double-wide homes on a permanent chassis with detachable wheels). Site-built components such as conditioned basements or crawlspaces are not exempt.
• Buildings or additions with very low energy use: Buildings or additions designed for a peak energy use of less than 3.4 Btu/h (1 Watt) per square foot of floor area. (Any occupied building intended to be heated and lived in will not meet this exemption.)
• Unconditioned buildings that are neither heated nor cooled
• Renovations except for those in Burlington which has its own municipal code
• Hunting camps