REFRESH YOUR HOME: 50% Off Installation + Financing up to 20 Years + $250 Online Booking Bonus
Dover, NH · Local Install Crew
Replacement Windows in Dover, NH
Triple-pane, energy-efficient windows built for New England winters.
About this product
Replacement Windows for Dover homes
Every replacement window we install is custom-measured for your opening and sized to the fraction of an inch. Triple-pane glass with low-E coatings, foam-filled frames, and factory-certified installation cut drafts, quiet the house, and lower heating bills. Every window is covered by a limited lifetime warranty and installed by W-2 crews — never subcontractors.
- ✓ENERGY STAR® 7.0 certified
- ✓Triple-pane low-E glass
- ✓Foam-filled insulated frames
- ✓Custom-sized to the opening
- ✓Full-day install for most homes
- ✓Limited lifetime warranty
Our process
How we install Replacement Windows in Dover
- 1
Free in-home consultation and precise opening-by-opening measurement
- 2
Custom manufacture — every window built to your exact opening size
- 3
Install-day protection: floors, furniture, and landscaping covered
- 4
Old-unit tear-out with EPA Lead-Safe practices on pre-1978 homes
- 5
Professional install, insulation, flashing, and exterior trim/capping
- 6
Full cleanup, walkthrough inspection, and warranty registration
How it compares
Coastal Triple-Pane vs. Standard Double-Pane
| Feature | Coastal Triple-Pane | Standard Double-Pane |
|---|---|---|
| Glass panes | 3 with low-E and argon | 2 with basic low-E |
| Frame | Foam-filled vinyl or fiberglass | Hollow vinyl |
| ENERGY STAR rating | 7.0 (Northern zone) | Baseline |
| Install crew | Factory-certified W-2 employees | Subcontracted |
| Warranty | Limited lifetime, transferable | 10–20 years |
Before & After
Real Replacement Windows transformation
Gallery
Replacement Windows — real installs
Reviews
What homeowners say about our Replacement Windows
★★★★★
"After putting off window replacement for years, I found these guys online. The friendly professional sales rep came to my house, showing me all my options with full specs. The precision construction & high-tech materials used let me know these were the best quality windows I've seen. I chose triple-pane, argon-krypton gas-filled, with a UV-tint. The quote was very reasonable. I didn't need to look any further. The 3 installers came out on time, courteous, respectful, very competent experienced professionals. They were very accommodating to my needs. In 1 full day, they installed 13 double-hung windows, each one custom made with precision and a nice snug fit, without disturbing the interior trim. After every window was installed, they cleaned the area and vacuumed well. Every window was installed beautifully, better than I could have imagined. I was shown the proper closure of the sashes for best seal, and the beautifully engineered twin locks, effortless tilt-to-clean operation. I am so glad I got the UV tint since I get migraines from UV glare. It also keeps the house cooler in summer. The house is much tighter, even on gusty days, these windows are solid. In the 3-yrs I've had these, no problems whatsoever. I would hire Coastal again without hesitation. Great people, Highly recommended."
★★★★★
"Jeffery has been so helpful! He was so fun and friendly to speak to and walked us through the entire process for our windows! Thank you so much! Would recommend"
★★★★★
"Coastal windows replaced our front door. They did a fantastic job. Professional, courteous, and stand behind their craftsmanship. We are thrilled with our new front door!"
FAQ
Replacement Windows — Dover questions
Recent projects
Projects near Dover, New Hampshire
Also in Dover
Other products we install here
Cost
How much does Replacement Windows cost in Dover, NH?
Window pricing is driven by how many openings you're replacing, the size and style of each unit (double-hung, casement, bay, or specialty shapes), the frame and glass package you choose, and the condition of the existing framing. Homes needing rot repair, custom capping, or difficult second- and third-story access take more labor. We don't quote a per-window price sight-unseen — we measure every opening in person and put the full scope in writing before any work begins.
Current offer
50% Off Installation + Financing up to 20 Years + $250 Online Booking Bonus
Financing
Financing up to 20 years
Affordable monthly payments on full-exterior projects, with approved credit.
Service Area
Serving Dover & every surrounding New Hampshire town
Local crews, same-day dispatch. Not sure if we cover your street? Call 978-818-1503.
ZIP codes served
- 03820
Replacement Windows in nearby towns
Why Dover chooses Coastal
Award-winning
7,000+ New England homeowners served
Factory-trained installers
James Hardie Elite Preferred
ProVia certified doors