Heat Pumps, Insulation & Air Sealing | Greater Portland, Maine
Your Whole-Home Solution to
Energy Efficiency
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.
- Efficiency Maine rebates up to $18,650. We handle the paperwork
- Certified Mitsubishi Diamond Contractor, 12-year warranty
- Family-owned & operated since 2006
- Free, no-obligation home energy assessment
Schedule Your Free Assessment
We call within 1 business day
Why Maine Homeowners Choose Horizon Homes
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.
Built for Your Home, Not a Template
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.
Detailed Quotes, No Surprises
Written plans with clear price breakdowns, prioritized improvements, and exact rebate amounts. You always know what you are getting and why.
Rebates: We Handle Everything
We deduct your Efficiency Maine rebate from your project cost upfront. No waiting, no paperwork on your end.
We See the Whole Picture, Not Just One Fix
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.
Maine Homeowners
Everything Your Home Needs, Under One Roof
From heat pump installation to comprehensive weatherization. We provide complete solutions to make your Maine home more comfortable, efficient, and cost-effective year-round.
Heat Pump Installation
Whisper-quiet, year-round heating and cooling. Zone-by-zone comfort from a certified Mitsubishi Diamond Contractor. Rebates up to $9,000.
Learn More →
Insulation
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 →
Air Sealing
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 →
Energy Assessments
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 →
High-Efficiency Boilers
Natural gas and propane high-efficiency boiler installation and replacement. Dramatically lower fuel bills with modern condensing technology from top-tier manufacturers.
Learn More →
Rebates + Financing
Maine homeowners can save thousands through Efficiency Maine rebates up to $18,650. We're a registered vendor — we handle all the paperwork and deduct your rebate upfront.
Explore Rebates →What Maine Homeowners Say
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."
Simple. Transparent. No Surprises.
From your first call to a more comfortable, efficient home. Here's exactly what to expect.
Free Home Assessment
A certified energy advisor visits your home, evaluates your energy improvement opportunities, and identifies the highest-impact upgrades. No pressure, no sales tactics.
Your Custom Plan
You receive a detailed, prioritized improvement plan with clear pricing, available rebates, and expected energy savings.
Professional Installation
Our certified crews complete the work with precision. We protect your home, clean up completely, and walk you through everything.
Is the Energy Assessment Really Free?
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.
Learn more: The True Cost of Doing Nothing About Home Energy.
More FAQs →