Our top priority at Energy Diagnostics Inc is providing all of our clients with the best possible service. We are committed to serving our community and making being energy efficient easy.

We pride ourselves on delivering results and are happy when our clients share their experiences with others who may be interested in our services

All reviews we receive help our staff improve on the quality of service we provide. If you’d like to leave a review, please click on an image to follow the links below and let us know how we did. If you need help with anything, please don’t hesitate to contact us!


"Olthof Homes has partnered with Energy Diagnostics for many years. We’ve found their services to be professional, accurate and timely. I would recommend them to anyone seeking energy rating assistance."

Fritz Olthof

Olthof Homes

"I have had the pleasure of working with Energy Diagnostics for over 15 years. They conduct their business in very timely, efficient and professional manner. I build more energy efficient homes because of their suggestions. I strongly recommend them.”

Michael O’Donnell

O’Donnell Homes

"Energy Diagnostics is the foremost authority on energy efficiency. They keep us in tune with the latest rebates and tax credits, and have shown use how to make a great house even better"

Brad Wallace

Granite Ridge Builders

"I am happy to provide a reference for Energy Diagnostics Inc., a RESNET certified HERS rating company that has been in business for 19 year in the field of rating the energy performance of buildings. Energy Diagnostics has a staff of HERS raters, BPI auditors, NAHB Green and LEED raters and energy code professionals. Among some of their achievements is the national 2007 RESNET Market Transformation Award and the 2010 Energy Star partner of the year award.

Energy Diagnostics has rated over 12,000 homes. Energy Diagnostics serves the states of Indiana, Illinois and Michigan. Its services includes verification of EPA Energy Star homes and the federal tax credit for energy efficient homes, conducting ARRA funded home energy audits, and 2009 IECC code training for home builder associations in the three state area.

Energy Diagnostics Inc. is a leader in the energy rating industry and you can feel confident in their ability to provide accurate energy rating calculations and field verification and test results."

Steve Baden

RESNET Executive Director

"Energy Diagnostics does a great job doing energy ratings on all of 180+ homes we build every year. Their knowledgeable staff guides our company in the right direction to make our homes more energy efficient and make our homes comfortable for our customers to live in for many years to come."

Justin Purdy

Vice President
Construction Lancia Homes

"Energy Diagnostics has had a team of NGBS Green Accredited Verifiers since 2008 when the NGBS Green building certification, based on the National Green Building Standard ICC/ASHRAE-700, first launched. Over the past ten years, Energy Diagnostics has become one of our highest volume and most experienced verifying companies in the country. Energy Diagnostics has experience verifying land developments, new single-family homes, and new multifamily buildings. Their team members are also among the most expert NGBS Green Verifiers for renovated and adaptive reuse multifamily buildings. Few verifiers have the depth of experience across all building types and NGBS versions over the years."

Michelle Foster

Vice President
Sustainability Home Innovation Research Labs

"Energy Diagnostics keeps us on our toes and ahead of the game! We began working with Energy Diagnostics in 2000, as they certified our new construction homes to the Energy-Star® program. In late 2008, it was a smooth transition to the NAHB Guidelines and then to the National Green Building Standard. Everything is handled with professionalism and integrity; from pre-scoring to scheduling to inspections and follow-through with NAHB. Ample notice is given when changes are happening to codes or standards. These guys are passionate about what they do, and they do it well."

Kelly Kaminski

Coolman Communities

Let's Build Something Great Together