Buildings & Energy

We spend most of our daily lives—sleeping, working, eating—in buildings. Our homes, offices, grocery stores, places of worship, etc. require a significant amount of energy to ventilate the air, manage temperatures, power our devices, and provide many of the other basic comforts we are accustomed to. The fossil fuels used in buildings and those used to generate the electricity we consume emit a significant amount of GHGs into the atmosphere. As of 2019, buildings represent 56% of our community’s total GHG emissions.

Check out the options below for making your home or business more efficient, as well as how to switch to clean sources of electricity!

• Get a Mass Save Home Energy Assessment! The City has partnered with HomeWorks Energy, an official Mass Save® partner, to provide no-cost Home Energy Assessments and weatherization (insulation and air sealing) services in Watertown.
  • Homeowner letter (PDF) and Landlord letter (PDF), sent via US Mail the week of May 5, 2025.
  • Read the Home Energy Assessment FAQs
• Get rebates for energy efficient appliances
• Upgrade to heat pumps in your home
• Insulate your home for better energy efficiency
• Opt up to 100% renewable energy through Watertown Electricity Choice
• Add solar to your roof- find competitive quotes through Energy Sage
• Low-income energy assistance programs