Our Energy Rating

Design Homes takes our energy ratings very seriously and we are very proud of the excellent ratings we receive on a consistent basis. It’s also very important to us that we share these ratings with the community.

The Home Energy Rating System (HERS) Index is the industry standard by which a home’s energy efficiency is measured. It is also the nationally recognized system for inspecting and calculating a home’s energy performance.

What does a HERS rating say about a house?

The HERS Index Measures a home’s energy efficiency. A low HERS Index Score can command a higher resale price. You can also anticipate the costs of energy bills to be lower with a low HERS score.

Design Homes HERS Rating 2015

How does the HERS index work?

  • A certified Home Energy Rater assesses the energy efficiency of a home, assigning it a relative value performance score. The lower the number, the more energy efficient the home.
  • The U.S. Department of Energy has determined that a typical resale home scores 130 on the HERS Index while a standard new home is awarded a rating of 100. The lower the number, the more efficient the home.
  • A home with a HERS score of 70 is 30% more efficient than a standard new home.
  • A home with a HERS Index score of 130 is 30% less efficient than a standard new home.
  • This inspector takes all the home’s information and sends it to an impartial 3rd party who generates your HERS score.




To learn even more about the HERS index visit the RESNET website here.

* Based on the U.S. Department of Energy definition of a HERS Index of 130.
** The information presented is for educational purposes only. Savings are average estimates for single family homes in the U.S. developed by the National Renewable Energy Laboratory. Savings will vary based on house type, orientation, house size, utility rates, climate and operation of home