20 Best Window Companies in Dover, NH (2023 Reviews)
Looking to improve your home's insulation? The top window replacement companies can help.
We analyzed all the top-rated window companies in Dover and selected the best 20 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
Why you can trust EcoWatch
Whether you're updating for aesthetics or have old windows, windows play a key role in conserving electricity in your home. According to the Department of Energy, heat or cool air lost through old or damaged windows could be responsible for 25-30% of household energy climate control usage.
Replacement windows improve the insulation in your home, not only making you and your family more comfortable during extreme temperatures, but also saving you money and helping the environment.
So if you're constructing a new home, renovating or changing out old windows in Dover, this guide is the best place to get started.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Dover
The EcoWatch team evaluated dozens of providers that service the Dover area to find the top window installation companies that fit our standards. The providers in this article scored best in our categories, including energy-efficient offerings, customer service, price, availability and more.

Window World
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EnergyStar Partner
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Large serice area
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Low prices relative to competitors
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Great industry reputation
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Lifetime warranty
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Quality of service will depend on your area
Window World is the largest window replacement company in the country, known for its vinyl windows and affordability. This company has been in business since 1995 and currently serves 200 locations nationwide. The provider has a lot of positive reviews from customers on online review websites.
It is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsIts high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window World cost in Dover?Window World does not list prices on its website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate information is to get a free quote from the company.

Renewal by Andersen
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Great industry reputation
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Award-winning company
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Member of US Green Building Council
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Manufactures products in-house
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No lifetime warranty
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More expensive than competition
Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has been in business since 1995 and currently serves nearly every state except Mississippi and West Virginia. The provider has a lot of positive reviews from customers on online review websites.
It uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.
Energy Efficiency of Renewal by Andersen WindowsA handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019. Not all of Andersen’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Dover?Andersen does not list prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to get more accurate information is to get a free quote from the company.

Aeroseal Windows
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Many years of experience
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Great industry reputation
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Low number of customer complaints
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Manufactures products in-house
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Custom Designs
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No lifetime warranty
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Not ideal for residential installations
Aeroseal Windows provides the best window installation for businesses in Dover. It's an installer that mainly serves commercial and multifamily properties, and also specializes in railings. If you’re looking for residential window installations, you should probably refer to one of the other companies on this list. This company has 23 years of experience in the windows business, and it has become one of the best companies in Dover. Many positive reviews on customer review websites back the provider's reputation.
If you’re looking for a company that installs windows and doors at businesses across the Eastern U.S, this may be the right company for you.
Energy Efficiency of Aeroseal Windows WindowsThe company claims it helps businesses save on energy expenses and reduce their carbon footprints with energy-efficient windows, as well as practices like Low-E glass coating, weatherstripping and more. Not all of Aeroseal’s offerings are Energy Star certified, so make sure you mention that you want Energy Star windows when inquiring.
How much does Aeroseal Windows cost in Dover?Aeroseal does not list prices on its website, but it provides high-quality windows at a competitive price point. For more detailed information on the cost, you can request a quote from the company.

Universal Windows Direct
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Makes charitable contributions
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Manufactures products in-house
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Wide variety of products and services
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Lifetime warranty
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Limited service area
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Some installations carried out by third-party contractors
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Quality of service will depend on your area
Universal Windows Direct offers the best warranty in Dover. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This window installation company has been in business since 2002 and currently serves 27 states nationwide.
You may want to consider choosing Universal if you're interested in a company that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsThe company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products. Not all of Universal’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Universal Windows Direct cost in Dover?Universal does not list prices on its website, but installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. The best way to get more accurate information is to get a free quote from the company.
We try to be unbiased and transparent by mentioning pros and cons for each company we review. Additionally, our rankings are not influenced by any partnerships.
More Window Companies in Dover
Renewal by Andersen Window Replacement
Saco, ME-
Free assessment
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Good Customer Service
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Price Transparency
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Educational Website
Services Offered
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Sliding Glass
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Bay Windows
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Aluminum Window Frames
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Window Replacement
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Residential Windows
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Full-Service Installations
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Fast Delivery
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Energy-Efficient Options
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Custom Window Designs
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Double-Hung
Window World of New Hampshire
Manchester, NH-
Free assessment
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Educational Website
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Timely Service
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Good Customer Service
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Price Transparency
Services Offered
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Double-Hung
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Residential Windows
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Custom Window Designs
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Sliding Glass
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Window Replacement
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Bay Windows
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Fast Delivery
Pella Windows & Doors of Newington
Newington, NH-
Educational Website
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Free assessment
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Price Transparency
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Good Customer Service
Services Offered
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Sliding Glass
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Residential Windows
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Double-Hung
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Fast Delivery
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Window Replacement
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Bay Windows
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Custom Window Designs
Portland Glass of Dover
Dover, NH-
Good Customer Service
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Price Transparency
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Educational Website
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Free assessment
Services Offered
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Custom Window Designs
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Commercial Windows
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Window Replacement
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Residential Windows
Granite State Glass
Portsmouth, NH-
Good Customer Service
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Educational Website
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Price Transparency
Services Offered
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Commercial Windows
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Custom Window Designs
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Glass Showers
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Aluminum Window Frames
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Residential Windows
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Window Replacement
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Fast Delivery
The Window Source NH
Seabrook, NH-
Educational Website
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Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Bay Windows
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Double-Hung
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Energy-Efficient Options
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Residential Windows
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Custom Window Designs
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Window Replacement
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Sliding Glass
Focalpoint Renovations
Seabrook, NH-
Price Transparency
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Free assessment
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Educational Website
Services Offered
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Custom Window Designs
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Window Replacement
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Commercial Windows
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Glass Showers
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Residential Windows
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Full-Service Installations
Window Woman of New England
Amesbury, MA-
Good Customer Service
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Price Transparency
Services Offered
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Window Repair
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Window Replacement
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Residential Windows
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Energy-Efficient Options
Refined Home Services
Atkinson, NH-
Good Customer Service
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Timely Service
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Educational Website
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Price Transparency
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Free assessment
Services Offered
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Commercial Windows
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Residential Windows
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Window Replacement
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Glass Showers
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Stained Glass
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Fast Delivery
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Custom Window Designs
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Double-Hung
Atlantic Window Warehouse
Newburyport, MA-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Window Replacement
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Custom Window Designs
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Double-Hung
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Residential Windows
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Fast Delivery
Portland Glass of Biddeford
Biddeford, ME-
Educational Website
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Price Transparency
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Free assessment
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Good Customer Service
Services Offered
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Custom Window Designs
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Glass Showers
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Residential Windows
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Window Replacement
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Commercial Windows
Morgan Exteriors
Hooksett, NH-
Free assessment
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Educational Website
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Good Customer Service
Services Offered
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Residential Windows
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Window Replacement
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Double-Hung
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Sliding Glass
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Bay Windows
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Custom Window Designs
Universal Windows Direct of Manchester
Manchester, NH-
Free assessment
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Educational Website
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Good Customer Service
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Timely Service
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Price Transparency
Services Offered
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Custom Window Designs
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Commercial Windows
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Bay Windows
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Full-Service Installations
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Double-Hung
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Sliding Glass
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Residential Windows
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Window Replacement
Beach Glass & Window Company
Dayton, ME-
Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Fast Delivery
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Glass Showers
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Sliding Glass
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Commercial Windows
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Window Replacement
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Custom Window Designs
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Residential Windows
Corporate Office for Pella of Boston
Haverhill, MA-
Price Transparency
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Free assessment
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Good Customer Service
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Educational Website
Services Offered
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Custom Window Designs
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Sliding Glass
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Double-Hung
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Residential Windows
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Energy-Efficient Options
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Bay Windows
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Commercial Windows
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Window Replacement
F.B.I. Contracting LLC
Concord, NH-
Good Customer Service
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Educational Website
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Price Transparency
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Free assessment
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Timely Service
Services Offered
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Stained Glass
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Double-Hung
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Energy-Efficient Options
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Custom Window Designs
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Residential Windows
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Window Replacement
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Commercial Windows
DaBella
Salem, NH-
Free assessment
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Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Bay Windows
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Glass Showers
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Residential Windows
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Commercial Windows
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Double-Hung
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Window Replacement
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Custom Window Designs
Dependable J M R Siding
Manchester, NH-
Free assessment
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Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Custom Window Designs
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Window Replacement
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Residential Windows
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Sliding Glass
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Fast Delivery
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Double-Hung
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Commercial Windows
Clear Choice Home Improvements
Manchester, NH-
Good Customer Service
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Free assessment
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Price Transparency
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Timely Service
Services Offered
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Custom Window Designs
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Commercial Windows
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Double-Hung
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Fast Delivery
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Residential Windows
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Window Replacement
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Bay Windows
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Glass Showers
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Sliding Glass
Beckett Glass & Aluminum
Concord, NH-
Good Customer Service
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Price Transparency
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Educational Website
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Free assessment
Services Offered
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Window Replacement
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Residential Windows
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Commercial Windows
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Glass Showers
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Aluminum Window Frames
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Custom Window Designs
Calculate how much you can expect to pay for window installation and replacement in Dover, NH using our customized window cost calculator.
Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.
How Installing Energy-Efficient Windows in Dover Saves You Money
Switching to energy-efficient windows can help improve the comfort of your home and help you save on power bills. Here's more information on how switching out your windows could help you:
- Save money on electricity bills: Installing energy-efficient windows reduces your energy bills by about 12% since you need less energy.
- Protect your investment: If you have a relatively old home, your windows are most likely outdated. Upgrading your windows can make your home more comfortable and also help raise the value of your property if you decide to sell.
- Protect your valuables from fading: The low-emissivity coatings on some energy-efficient windows filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
- Better temperature control in your home: Energy-efficient windows can cut back on how much heat is lost through your windows when heating your home.
Estimated Cost of Window Replacement in Dover
Each window installation company offers various services and has varying costs depending on a few factors.
How Much Do New Windows Cost?
On average, Dover homeowners can expect their replacement window installations to range from $250 to $1,200. The most common installations sit at about $600. But costs vary considerably based on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window companies also provide door installations, which will add extra costs to your project.
It's important to keep in mind that windows with higher efficiency may cost more upfront but can save you hundreds of dollars by decreasing your energy bills. Investing in certified energy-efficient windows can save Dover homeowners $459+ a year when replacing single-pane windows.
How much your window installation costs will also vary based on the type of material you choose for the frames. Wood windows are generally the most expensive, although it depends if they are completely wood or clad with aluminum or vinyl. Fiberglass windows also tend to be somewhat more expensive than vinyl, but they are more efficient.
What Services do Window Installers Offer?
The first thing to ask yourself when planning on installing new windows is: Do you need a full-frame installation or a pocket installation?
Full-frame installations require replacing the whole window — the sill, frame, trim and all. These are typically done when you want to change the style of your window or when it has a great amount of deterioration. Full-frame installations involve more time and labor and will increase overall costs. Pocket installations (or retrofits) entail replacing a window within the existing frame, which makes pocket installations more simple and affordable. However, if the frame has any damage or rot, you should opt for a full-frame installation instead.
Your window installation company can help you choose which type of installation you need.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Dover
In our hunt to find the most reliable, eco-friendly window installers in Dover, the EcoWatch Reviews team chose the above companies as the top window installation companies in the city. We have evaluated the best window installation companies in Dover mostly based on their energy efficient offerings, as the most sustainable option also benefits homeowners in many ways. Energy Star certified windows have been shown to lower power bills by hundreds of dollars. Along with energy efficiency, our rating methodology considers the following factors:
Service Area
This one is self-explanatory, but we've chosen to highlight window installers that serve the Dover area so you can find the best window installation company near you.
Work Quality
When choosing new windows, the quality and variety of services can often play just as important of a role in insulation and performance as the brand you get. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed patterns in recent online reviews to determine the companies with the most customer satisfaction. Customer satisfaction might be the most important factor, as it reflects the quality of services across nearly every category, including professionalism, cost, quality of parts, quality of installation, warranty and more.
Cost
Cheaper windows certainly don't mean better windows, but we know many of our readers try to keep costs as low as possible. When analyzing the prices of providers, we awarded higher points to companies with reasonable prices and accessible financing rather than "cheaper" services.
Warranty
Protecting your investment in new windows is important. That's why window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Dover's climate, homeowners need to be wary of water damage, rot and low efficiency. We factored in local experience to reflect the ability of Dover window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Dover, NH Window Replacement FAQs
How much should a window install cost?
The average cost to install a window ranges from $450 to $650. There are a variety of factors that influence how much it costs, which include the materials used in designing the windows, local labor costs, your property's location, the number of windows, how energy-efficient the windows are and styles and sizes of windows.
Which type of window should I get?
A window's energy efficiency is affected by several factors, such as the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are often the most energy-efficient and are certified by the U.S. Department of Energy.
Can you install your own windows?
If you're handy and know how to replace a window, it's possible to install your own windows. However, if you don't have the time or skills, we recommend hiring a professional.
When is the best time of year to replace windows?
Replacement windows can be installed during any season, but autumn might be best. Regardless of when you install them, the contractors will take steps to make sure that too much hot or cold air doesn't get into the house, so the temperature outside doesn't necessarily matter that much. What's more important than the temperature is that the weather should be dry.