Souzet is a Home Performance Contractor and Mass Save partner based in Holliston, Massachusetts. We provide insulation, air sealing and high-efficiency heating and cooling for homes across MetroWest and Greater Boston, and we manage every step of the program for our customers.
Souzet was founded on a simple observation: most Massachusetts homes lose a significant amount of energy through their attics, walls and ductwork, and many homeowners are unaware that substantial program incentives exist to correct it.
As a Home Performance Contractor participating in the Mass Save program, we manage the full process: we diagnose the home, present a clear scope of work with the incentives already applied, prepare the rebate documentation, and complete the installation to program standards. Our estimates are transparent, with no inflated pricing and no sales pressure.


The assessment tells us what your home needs. If the answer is 'not much', that's what we'll tell you.
We know the program's rules, deadlines and forms, and we run that process for every customer.
We show up when we said, protect your home while we work, and leave it cleaner than we found it.
A specialist visits your home, checks insulation, air leaks and heating equipment, and shows exactly which Mass Save rebates you qualify for. No cost, no obligation.