Our best-selling Harvey Classic Double Hung — .24 U-value glass, built in New England, installed by our own crew.
From $617 installed — and $250 off every order of 10+ windows.
Financing available · Free in-home consultations
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★The 250 Sale · America turns 250 — you save $250 on 10+ windows★
The Window Source of New Hampshire
Specialty & Custom Windows in New Hampshire
4.8 · 51 Google & Facebook reviews · Family owned · Lifetime warranty
Basement, casement, awning, bay, bow, and garden windows — custom-made to your opening and professionally installed.
- Every window custom-measured to your opening
- Casement, awning, hopper & basement styles
- Bay, bow & garden windows
- Lifetime warranty on your windows
Prefer to talk? (603) 764-7212
250 Sale · $250 off 10+ windows
Get Your Free Quote
No pressure, no obligation — we measure, you decide.
Takes 30 seconds · We never share your info
$545installed, in writing
4.8★51 verified reviews
Lifetimewarranty on your windows
1–2 daysmost whole-home installs
Basement Windows
Old steel basement frames rust, leak, and let the cold pour in. We replace them with tight vinyl hoppers and sliders that keep the weather out and still meet egress needs where required.
Casement & Awning Windows
Crank-out casements seal tighter than almost any other style and are perfect over kitchen sinks and in hard-to-reach spots. Awnings let you vent even in the rain.
Bay, Bow & Garden Windows
Add space, light, and curb appeal with a bay or bow — or give your plants a home with a garden window. We build them to your opening and finish them inside and out.
“Manny and his co worker spent 10 hours at the house on our new windows & doors and they came out A+++. They spent time after cleaning every spec of the area.”
— Adam B. · Google review
The 250 Sale
America Turns 250. You Save $250.
Exceptional Value. American-Made. Lifetime Warranty.
Easy Financing Through Synchrony
0% Financing for 18 Months*
A house full of new windows for payments as low as $87/month* — invest now, and start saving on your utility bills this winter.
*Rates and terms dependent on qualifying credit.
"To all of our customers; thank you. Our success relies on you and your experience. Your satisfaction has always been, and will always continue to be, our highest priority."
- Skip Longacre
Owner The Window Source NH, MA, & ME
Owner Skip Longacre, former US military, understands what it means to be of service to our nation. We proudly offer a 5% discount off of all goods and services to all military, first responders, police, fire department personnel, veterans, emergency medical technicians, as well as senior citizens.
America turns 250 — you save $250 on 10+ windows
Have an unusual window?
Odd sizes are Tuesday for us — every window we sell is custom-made to your opening. Tell us what you've got and we'll quote it.
Our Service Areas
Here at Window Source NH we proudly service communities throughout New Hampshire, Massachusetts, and Maine. If you are looking for a window installation company to service your New England home, you found us! Some specific areas we serve are listed below.
For a more complete list, please visit our service areas page. If you don't see your city on the list, don't worry! We work all over New Hampshire, Massachusetts, and Maine and would love to take your phone call.
- Rockingham County, NH
- Hillsborough County, NH
- Merrimack County, NH
- Strafford County, NH
- Essex County, MA
- York County, ME
- Cumberland County, ME
Double Hung Windows
Series 3000 starting @ $587 installed. We offer the industry's highest quality and value replacement windows available. Whether you need one or three dozen, our professional crew will often offer same day installation.
Sliding Patio Doors
At The Window Source we offer replacement doors for your home. Whether you need front or a sliding patio doors for your home, then call the window and door installation professionals at The Window Source.
5 Star Professional Installation
Our customers consistently give us five star ratings because we are professional, care about your time & space, and ensure that your home gets the best product installation available in the industry.
