Heat Pumps, Insulation & Air Sealing | Greater Portland, Maine
We're a family-owned company on a mission to make every home in Greater Portland comfortable, energy-efficient, and undeniably cozy. Since 2006, we've helped over 2,500 Maine families cut their energy bills and improve their comfort.
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Most contractors do one thing. We do everything: heat pumps, insulation, air sealing, and energy assessments, all under one roof. That means we can design a custom plan optimized for your specific home, your budget, and your goals.
One of the few Maine companies to offer both weatherization and heat pump installation. Every plan is tailored to your home, your budget, your goals.
Written plans with clear price breakdowns, prioritized improvements, and exact rebate amounts. You always know what you are getting and why.
We deduct your Efficiency Maine rebate from your project cost upfront. No waiting, no paperwork on your end.
Insulating without air sealing wastes money. Installing heat pumps in a leaky house means an oversized system. We look at the whole picture so you get lasting results.
From heat pump installation to comprehensive weatherization. We provide complete solutions to make your Maine home more comfortable, efficient, and cost-effective year-round.
Whisper-quiet, year-round heating and cooling. Zone-by-zone comfort from a certified Mitsubishi Diamond Contractor. Rebates up to $9,000.
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Dense-pack cellulose for walls, loose-fill cellulose for attics, and rigid foam board for foundations. Every cavity filled completely. Rebates up to $8,000.
Learn More →We find and seal hundreds of hidden air leaks, around wiring, plumbing, recessed lights, and rim joists. Often the fastest-payback home improvement available.
Learn More →Free, no-obligation home energy assessment. Our certified experts evaluate your entire home and provide a detailed, prioritized improvement plan with clear pricing.
Learn More →Natural gas and propane high-efficiency boiler installation and replacement. Dramatically lower fuel bills with modern condensing technology from top-tier manufacturers.
Learn More →Maine homeowners can save thousands through Efficiency Maine rebates up to $18,100. We're a registered vendor — we handle all the paperwork and deduct your rebate upfront.
Explore Rebates →Real reviews from real customers across Southern Maine.
"All work was performed in a timely and detailed manner. There was a HUGE attention to detail. All company associates were highly professional, extremely courteous, and demonstrated passion and compassion. I highly recommend."
"The process was pleasant from start to finish. When cleanup was complete, it was like no one had ever been there. Working through the rebate paperwork was some of the easiest interactions I've had. I cannot recommend Horizon Homes enough."
"An Efficiency Maine inspector said 'Oh yeah, Horizon, their work is always great.' I'm a first-time homeowner who relies heavily on online reviews, let me add to the five-star pile. Horizon Homes was the right decision for us."
From your first call to a more comfortable, efficient home. Here's exactly what to expect.
A certified energy advisor visits your home, evaluates your energy improvement opportunities, and identifies the highest-impact upgrades. No pressure, no sales tactics.
You receive a detailed, prioritized improvement plan with clear pricing, available rebates, and expected energy savings.
Our certified crews complete the work with precision. We protect your home, clean up completely, and walk you through everything.
Yes, genuinely free with no strings attached. We don't charge for the assessment, and we don't pressure you to buy anything afterward. Our philosophy is that an informed homeowner makes a better customer. If our recommendations make sense for your situation, great. If not, we hope you'll keep us in mind for the future.
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