Building Energy Code (Delaware)

From Open Energy Information

Last modified on February 12, 2015.

Rules Regulations Policies Program

Place Delaware
Name Building Energy Code
Incentive Type Building Energy Code
Applicable Sector Commercial, Residential
Eligible Technologies Comprehensive Measures/Whole Building
Active Incentive Yes
Implementing Sector State/Territory
Energy Category Energy Efficiency Incentive Programs

Code Change Cycle No set schedule. Most recent update effective: July 1, 2010.
Commercial Code ASHRAE Standard 90.1-2007, mandatory statewide; can use COMcheck-EZ to show compliance.

Residential Code 2009 IECC, mandatory statewide

Date added to DSIRE 2006-07-21
Last DSIRE Review 2013-07-24

References DSIRE[1]


Much of the information presented in this summary is drawn from the U.S. Department of Energy’s (DOE) Building Energy Codes Program and the Building Codes Assistance Project (BCAP). For more detailed information about building energy codes, visit the DOE and BCAP websites.

In 2004, the governor signed SB 306 adopting the 2000 International Energy Conservation Code (IECC) for residential construction and American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Standard 90.1-1999 for commercial construction.  SB 59, signed in July of 2009, strengthened Delaware's building code, requiring 2009 IECC for new detached one- and two-story family dwellings and all other new residential buildings three stories or less constructed after July 1, 2010. All other new construction built after July 1, 2010, including high-rise residential, must meet ASHRAE 90.1-2007. The bill further requires all new residential buildings constructed after December 31, 2025, and all new commercial buildings constructed after December 31, 2030 to be zero net energy capable. To be qualified as net zero energy capable, the building must be energy efficient enough that the building would consume zero energy if the building owner chose to install on-site generation.

Incentive Contact

Contact Name Crystal Nagyiski
Department Delaware Department of Natural Resources and Environmental Control
Division Division of Energy and Climate
Address 1203 College Park Drive, Suite 101
Place Dover, Delaware
Zip/Postal Code 19903
Phone (302) 735-3480


  • Incentive and policy data are reviewed and approved by the N.C. Solar Center's DSIRE project staff.[1]


  1. 1.0 1.1  "Database of State Incentives for Renewables and Efficiency (DSIRE)"