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What is a HERS Index Score?

Using the Home Energy Rating System

HERS is short for Home Energy Rating System and is a process of evaluating the energy efficiency of a home. Without it, it’s just a guess on whether or not a home will perform well or cost you money. To earn a HERS Index score, there are many mandatory standards the home needs to comply with, such as window sealing, insulation, and wall sealants.

The HERS Index Score is based on a scale from 0 to 150, with 0 being a net-zero energy home (where the home generates as much energy as it consumes) and 150 being a home built to the minimum standards of the 2006 International Energy Conservation Code (IECC). The HERS Index Score is determined by a professional energy auditor who conducts a detailed analysis of the home's energy consumption, including a physical inspection of the home, a review of the construction plans, and a review of the home's energy systems and appliances.

An independent certifier will first evaluate the house plans and provide feedback along with an estimated HERS Index Score. The certifier physically inspects the house at least twice. The first visit is when the insulation is being installed to ensure it is being done properly. The second visit is when the home is complete. At this point, the certifier makes a general visual observation and then tests the home for “tightness” by performing a blower door test. A blower pressurized the home and a test meter measures how well the home holds the pressure. The lower the score, the better, just like the HERS Index Score. Typical new construction homes are estimated to score at 100. A HERS Index Score of 50 would indicate that the home is 50% more energy efficient than a typical new construction home.

DON’T TRUST YOUR DREAMS TO JUST ANYONE.

Booklet: What you need to know before hiring a home builder. A guide for home buyers.

You should feel confident and excited during your home-building process. After all, the builder you choose could mean the difference between a project that's done right, on time, and on budget and one that costs too much, takes too long, and is fraught with quality problems.

But with every builder claiming to be qualified, how can you be sure you’re picking the right one?

Download What You Need to Know Before Hiring a Home Builder, written by Choice Builders’ owner, Roger Thomas. This guide will help you choose a builder who is right for you.

In it, you'll find answers to questions like:

  • How do I make sure a contractor can build to my budget?
  • Why do some contractors appear to cost more than others do?
  • Should I ask for a “free” estimate?
  • How do I choose a good contractor, let alone the best one?
  • How should I compare prospective contractors?
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Our Affiliations and Professional Credentials:

Energy Star logo
LEED certification
Passive House Institute U.S. Certified Builder
Certified Green Professional National Association of Home Builders credential
U.S. Green Building Council LEED certified
Houzz Best in Service
Cedar City Rotary Club
Better Business Bureau A+ Rating
Cedar City Chamber of Commerce
Certified Aging-In-Place Specialist. Houses for Living. Homes for Life.
RESNET Energy Smart Contractor
Iron County Home Builders Association

Learn more about building a new home:

backside view of stucco home with patio opening from living room
close up of artistic glass lighting hanging from ceiling in master bathroom
master bedroom built with two large windows on each side of king size bed and loveseat
barn door with artistic wood pattern entry to master bathroom from master bedroom
wood framing of roof for new house under construction

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