An Energy Efficiency Consulting & Improvement Company


With HERS Rating

A9 Green has been conducting Energy Consulting and Home Energy Ratings (HERS Rating) in over 95 cities and towns in Massachusetts since 2009. We work with developers, architects, builders and homeowners in the Greater Boston and Eastern Massachusetts areas. With expertise in digital 3D and energy modeling, Massachusetts code compliance, and architecture and building science, we are able to provide a variety of services to ensure new homes meet and exceed energy efficiency standards.


Our Mission

To help the environment by helping you to build a better, more comfortable, sustainable, healthier and safer place to live.

Our Vision

By applying the latest knowledge and technologies in building science, we aim to improve the energy efficiency of buildings while making them more sustainable for our future generations.

House Frames
Our Commitment

To provide the best customer and employee satisfaction while delivering successful services which positively impact our planet.

Why A9 Green?

With 10 years of experience and over 1,000 projects, we have built our reputation based on hard work, integrity, and great service. Our expertise and capabilities enable us to be an effective contributor to your project team. 

Our mission is to help create buildings that are:




Environmentally Friendly

Higher Resale and Rental Value


Energy Efficient

How can A9 Green help you?

A9 Green administers a wide variety of services for builders, architects, and homeowners to help create the most energy efficient projects in Massachusetts. Our work ranges from single and multi-family homes, HighRise and LowRise buildings, and commercial spaces. Whether the project is new construction, renovation or addition, we will work with you to pass all code requirements and get you up to thousands of dollars in rebates if qualified.

Certificate of Recognition from ENERGY S

329 Massachusetts Ave Lexington, MA, 02420

1 Hardy Rd #1160 Bedford, NH, 03110

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Copyright A9 Green / Total Green Energy Solution, LLC | All Rights Reserved © 2009