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About Us

The Best Window. The Best Price. Guaranteed.

Our selection is huge. We have what you are looking for and we offer the best values. Are you a homeowner in New Hampshire, Southern Maine, or Massachusetts looking for new windows? Then Window Source is the perfect destination for you. We offer the highest-quality replacement windows available at factory-direct pricing. We guarantee our customers get a premium, energy-efficient product for a fraction of the cost of our competitors’ models. No need to shop at the Big Box stores ever again. That’s the Window Source advantage.

Need more than just windows? We also specialize in sliding doors, patio doors, and vinyl siding. Just fill out the quick form below and we’ll have one of our friendly sales professionals contact you right away.

Why Our Replacement Window Service Is The Best

  • 100% Customer Satisfaction Guarantee
  • We Offer Factory Direct Pricing
  • Our Replacement Windows Are 100% Green & Energy Efficient
  • We Are Family Owned and Operated

100% Customer Satisfaction Guarantee. We aren’t happy unless you’re happy. Following every installation we make sure our customers are thrilled with their new windows, and that the jobsite is properly cleaned-up. We want our customers bragging to their neighbors about us!

We Offer Factory Direct Pricing. What does factory direct pricing mean to you? It means we cut out the middle man to save you money. Why deal with paying more from big box stores when we bring the windows to you right off the production line. Each job we have windows custom ordered to ensure they fit your home. All this service and competitive prices? That’s what factory direct means to you.

Our Replacement Windows Are 100% Green & Energy Efficient. Almost all of our windows are Energy Star® compliant. Low-emissive (Low-E) glass is window glass that has been treated with an invisible coating. Windows treated with Low-E coatings are proven to reduce energy consumption, decrease fading of fabrics, such as window treatments, and increase overall comfort in your home. Repeat after me… “LowE glass with the argon gas!”

We Are Family Owned and Operated. The Window Source of New Hampshire is a family owned business. From the consultation to the installation, we do it all!

Our Window Replacement Process

Window replacement is a major decision for any homeowner. At The Window Source, we guide you through our process, from measuring to installation, one step at a time.

“Measure twice. Install once. Perfect fit every time.”

When you choose The Window Source, you know your windows will be installed by certified professionals in a timely fashion. Measure twice, install once is our philosophy. You’ll wonder why you waited so long to call! We’re confident you’ll love how your new windows make your home look and feel, and we know you’ll love those new heating/cooling bills when you see the savings. Just fill out the form below for a free in-home consultation.

We Support Our Service Personnel


“We proudly support all military, first responders, police, fire department personnel, veterans, and emergency medical technicians. If you are member of one of these groups, or a senior citizen, we gladly offer you a 5% discount off of all goods and services. Please contact us to claim your discount.”
– Skip, Owner @ Window Source NH

The Best Windows. The Best Price.

Highly Reviewed. Local Installers. A+BBB Rated. We Stand Behind Our Work With a Lifetime Warranty. Best Price Guaranteed. We Won't Be Undersold. We'll Beat Any Competitors Written Quote. Call Now for a Free In-Home Estimate!



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Awards & Certifications

Your Reliable Local Window, Door and Siding Installer

Free In-Home 30 Minute Estimate

100% Transferable Lifetime Warranty

Professional & Courteous Installers

50 Years of Combined Experience

100% Green & Energy Efficient

Family Owned & Operated

See why we are the best!

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