© 2018 by A9 Green. Proudly created with Wix.com

  • Houzz Social Icon
  • Google Places Social Icon
  • Facebook Social Icon
  • Yelp Social Icon
  • LinkedIn Social Icon

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 is to help create buildings that are:



Environmentally Friendly


Higher Resale and Rental Value


Energy Efficient

With Lower Utility Bills

HERS Rating

We assure your project complies to Massachusetts and U.S. stringent energy codes.

2015 IECC

MA Stretch Code


Bring your project to life with our 3-Dimensional services.

3D Animation

3D Printing

Interior Design Visualization

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.

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. 


A9 Green/ Total Green Energy Solution, LLC. 

329 Massachusetts Ave | Lexington, MA 02420


Check Us Out On:

  • LinkedIn - Black Circle
  • Google Places Social Icon
  • Yelp Social Icon
  • Houzz - Black Circle

Office Hours

Mon    9:00am - 5:00pm

Tue      9:00am - 5:00pm

Wed    9:00am - 5:00pm

Thurs   9:00am - 5:00pm

Fri        9:00am - 5:00pm 

Sat             Closed

Sun            Closed


Google Reviews





A9 Green /
Total Green Energy Solution, LLC

329 Massachusetts Ave | Lexington, MA 02420

781-778-7054 | Info@A9Green.com