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Home Energy Score: Information for Interested Assessors

To offer the Home Energy Score to homeowners, Assessors work directly with Home Energy Score Partners. Interested Assessors should contact a local Home Energy Score Partner for information about joining their program.

Interested Assessors must hold one of the following credentials as a minimum qualification. The Department of Energy will continue to accept previously required credentials; Building Performance Institute Building Analyst and Residential Energy Services Network HERS Rater.

Organization Minimum Accepted Credential
American Society of Home Inspectors (ASHI) ASHI Inspector or Certified Inspector
Building Performance Institute (BPI) Building Science Principles Certificate of Knowledge
International Association of Certified Home Inspectors (InterNACHI) Home Energy Inspector
National Association of Home Inspectors (NAHI) Certified Real Estate Inspector
National Association of the Remodeling Industry (NARI) Green Certified Professional, Certified Remodeler, or Master Certified Remodeler
North American Technician Excellence (NATE) Air Conditioning/Heat Pumps, Gas/Oil Heating, or Gas/Oil Hydronics
Residential Energy Services Network (RESNET) HERS Rater


Interested Assessors with the necessary credentials must also pass a two-part test in order to access the Home Energy Scoring Tool. The test includes practical and written portions. The practical exam takes place in the Home Energy Score Simulating Training (the Sim), a 3-D simulation environment. The Sim models the data collection process in several sample homes. Before taking the test, candidates have access to training tools including practice houses in the Sim. Candidate Assessors must score an 80 or better on three “Challenge/Practice” homes and a 90 or better on two test homes. Candidates must score an 80 or better on the written portion of the exam which consists of 20 questions covering the Home Energy Score program.

A video demonstrating the Sim is available from Interplay Learning, the technology company that developed the Sim. New Assessors must be accompanied by a “mentor” (a highly experienced professional) during their first home walk through.

Interested Assessors are encouraged to reach out to organizations (e.g., utilities, state agencies, nonprofits, contractor associations) that could administer the delivery of the Score on a local, state, or national basis to find out if they are interested in becoming Home Energy Score Partners. Interested Partners can contact to request additional information and resources for offering the Home Energy Score.

These program requirements reflect changes to the Home Energy Score testing and credential requirements, announced in February 2015. Findings from research, analysis, and pilot testing conducted with Assessor candidates across the nation support the new qualifications for Assessors. A summary of the changes are outlined in the chart below.

  Existing Qualification Requirements New Qualification Requirements
Credentialing Prerequisites
  • BPI Building Analyst
  • HERS Rater
Current credentials recognized by leading building-related industry organizations (e.g. ASHI, BPI, InterNACHI, NARI, NATE, RESNET and others)
Practical Test Candidate uses the Home Energy Scoring Tool to score three homes; home characteristics are provided in written form Candidate uses the Home Energy Score 3-D simulation tool to retrieve home characteristics data and to score
- Three “Practice/Challenge” Homes (80 or better)
- Two Test Homes (90 or better)
Written Exam Score of 80 or better on multiple choice test that includes 50 questions regarding building science as well as the Home Energy Score program Score of 80 or better on multiple choice test comprised of 20 questions covering the Home Energy Score program only
Quality Assurance 5% of homes must be rescored under a DOE approved quality assurance plan
Mentoring None First home scored with a mentor; counts toward quality assurance requirement


Existing Assessors who have qualified within the last four months or have kept their status active by scoring houses within the last four months will not need to requalify.  Those who have not stayed active will need to work through their Partner to take a brief online Assessor refresher course and test.

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