23 Best Window Replacement Companies in Dover, NH (Mar 2023)
Window Companies Near Me
Thinking about improving your house's insulation? The best window replacement companies can help.
We analyzed all the top window installers in Dover and selected the top 23 based on:
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Customer reviews
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Window replacement expertise
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Popularity with home-owners like you
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Updated March 14, 2023
Why you can trust EcoWatch
Whether you're doing renovations or have windows that need repairs, windows play a crucial role in conserving electricity in your home. The Department of Energy estimates that heat gained or lost through old or damaged windows could represent about 30% of residential energy climate use. In Dover, where the electric bills are an average of $33 per month, that's almost $$120 per year wasted.
Installing energy-efficient windows on your house can help you save money each month on your electric bills — and you can help the environment as well.
Efficient windows are of particular importance in Dover, where winters are long and cold. According to Energy Star, switching to energy-efficient windows can save the average homeowner up to $459 each year.
Best Overall
Renewal by Andersen
- Award-winning company
- Member of US Green Building Council
- Manufactures products in-house
- No lifetime warranty
Best Affordability
Window World
- Low prices relative to competitors
- Great industry reputation
- Large serice area
- Quality of service will depend on your area
Best Warranty
Universal Windows Direct
- Lifetime warranty
- Wide variety of products and services
- Makes charitable contributions
- Limited service area
Best Window Replacement Companies in Dover
The EcoWatch Reviews team evaluated several window installation companies across Dover to narrow our list down to the top ones. The installers we've mentioned in this article passed our review standards for energy-efficient offerings as well as price, customer service, local expertise and beyond.

Renewal by Andersen
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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
Renewal by Andersen is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has over 27 years of industry experience, and it currently provides services to nearly every state except Mississippi and West Virginia. Many positive reviews on customer review websites back the company's reputation.
Andersen may be the company for you if you're interested in one that 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 WindowsRenewal by Andersen appeals to eco-conscious consumers by providing energy-efficient window offerings. A 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.
How much does Renewal by Andersen cost in Dover?Though prices are not available on Andersen's website, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. If you'd like to know for sure, you can inquire about a quote on the company's website.

Window World
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Low prices relative to competitors
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Great industry reputation
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Large serice area
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Quality of service will depend on your area
Window World provides windows expertise in Dover. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has been in the window installation business for around 27 years. Hundreds of positive reviews from customers online back the provider's reputation.
If you're looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, this may be the right company for you.
Energy Efficiency of Window World WindowsWindow World is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company's windows are Energy Star certified, so be sure to ask your Window World representative when inquiring about services.
How much does Window World cost in Dover?Window World doesn't have any cost information displayed 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.

Universal Windows Direct
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Lifetime warranty
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Wide variety of products and services
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Makes charitable contributions
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Limited service area
Universal Windows Direct has 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 company has been operating since 2002 and currently provides services to 27 states nationwide. Hundreds of positive reviews from customers online back the provider's reputation.
It has established itself as 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 offerings are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.
How much does Universal Windows Direct cost in Dover?Prices aren't listed on Universal's 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. Receiving a free quote on its website is the best way to know for sure.

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 has 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. Aeroseal has around 23 years of experience in the window replacement business.
You may want to consider picking Aeroseal if you're interested in a installer that installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsThere are a wide range of window types available from Aeroseal Windows, some of which are Energy Star products. The 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.
How much does Aeroseal Windows cost in Dover?Although pricing is not available on Aeroseal's website, it provides high-quality windows at a competitive price point. The best way to get more accurate pricing information is to ask for a free quote from the company.
One thing to note is that the companies in this section are national, meaning the quality of customer service may vary depending on your local crew. We have tried to stay unbiased and transparent by describing both pros and cons for each company.
More Window Replacement Companies in Dover
Merrimack Valley Glass & Mirror
Newburyport, MA-
Free Quotes
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Good Customer Service
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Arrives on Time
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Educational Website
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Windows
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Stained Glass
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Residential Windows
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Commercial Windows
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Sliding Glass
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Aluminum Window Frames
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Glass Showers
The Window Source NH
Seabrook, NH-
Award-Winning
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No-fee Quotes
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Good Customer Service
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Consistent Workmanship
Services Offered
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Architectural Glass
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Fast Delivery
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Energy-Efficient Options
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Custom Windows
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Double-Hung
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Sliding Glass
Glass Unlimited
Wells, ME-
Timely Service
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Dependable Service
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Excellent Customer Service
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No-fee Quotes
Services Offered
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Residential Windows
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Fast Delivery
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Custom Windows
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Aluminum Window Frames
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Full-Service Installations
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Commercial Windows
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Sliding Glass
Timberlane Glass and Mirror
Plaistow, NH-
Free Quotes
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Consistent Workmanship
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Educational Website
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Price Transparency
Services Offered
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Sliding Glass
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Business Windows
Southers Construction
Dover, NH-
Good Customer Service
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No-Hassle Pricing
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Locally Recognized for Quality
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Free Quotes
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Windows
Renewal by Andersen Window Replacement
Saco, ME-
No-fee Quotes
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Excellent Customer Service
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No-Hassle Pricing
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Reliable Service
Services Offered
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Energy-Efficient Options
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Custom Windows
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Aluminum Window Frames
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Full-Service Installations
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Double-Hung
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Sliding Glass
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Bay & Bow Windows
Window World of New Hampshire
Manchester, NH-
Helps Educate Customers
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Free Quotes
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Reliable Service
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Price Transparency
Services Offered
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Custom Window Designs
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Architectural Glass
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Sliding Glass
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Double-Hung
Demers Plate Glass Co
Haverhill, MA-
Educational Website
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Price Transparency
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Excellent Customer Service
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No-fee Quotes
Services Offered
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Residential Windows
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Architectural Glass
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Doors
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Custom Windows
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Aluminum Window Frames
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Commercial Windows
Clear Choice Home Improvements
Manchester, NH-
Free Quotes
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Locally Recognized for Quality
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Arrives on Time
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No-Hassle Pricing
Services Offered
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Custom Windows
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Sliding Glass
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Double-Hung
Queen City Glass & Mirror
Manchester, NH-
Excellent Customer Service
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No-Hassle Pricing
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Consistent Workmanship
Services Offered
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Residential Windows
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Glass Showers
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Custom Windows
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Aluminum Window Frames
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Full-Service Installations
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Commercial Windows
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Sliding Glass
Pane Free Glass
Manchester, NH-
Excellent Customer Service
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Free Quotes
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No-Hassle Pricing
Services Offered
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Residential Windows
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Glass Showers
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Custom Windows
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Full-Service Installations
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Business Windows
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Double-Hung
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Sliding Glass
Blind Gallery New England
Stratham, NH-
No-Hassle Pricing
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Good Customer Service
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Helps Educate Customers
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Free Quotes
Services Offered
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Custom Windows
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Aluminum Window Frames
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Energy-Efficient Options
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Sliding Glass
Alton Bay Blinds of New England
Hampton, NH-
Locally Recognized for Quality
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Price Transparency
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Free Quotes
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Helps Educate Customers
Services Offered
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Custom Window Designs
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Sliding Glass
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Commercial Windows
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Double-Hung
Atlantic Window Warehouse
Newburyport, MA-
No-fee Quotes
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Timely Service
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No-Hassle Pricing
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Educational Website
Services Offered
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Custom Window Designs
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Residential Windows
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Sliding Glass
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Double-Hung
Window Works Home Services, LLC
Wolfeboro, NH-
Educational Website
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Price Transparency
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Good Customer Service
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No-fee Quotes
Services Offered
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Custom Windows
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Residential Windows
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Commercial Windows
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Stained Glass
Methuen Glass 2
Methuen, MA-
Helps Educate Customers
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No-fee Quotes
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Good Customer Service
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Price Transparency
Services Offered
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Glass Showers
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Residential Windows
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Custom Windows
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Commercial Windows
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Sliding Glass
Newell and Crathern
Loudon, NH-
Excellent Customer Service
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Price Transparency
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Free Quotes
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Educational Website
Services Offered
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Residential Windows
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Energy-Efficient Options
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Custom Window Designs
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Business Windows
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Double-Hung
Glass Routes Co
Madbury, NH-
Free Quotes
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Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Glass Showers
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Residential Windows
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Custom Windows
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Commercial Windows
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Sliding Glass
Pella Windows & Doors of Newington
Newington, NH-
No-Hassle Pricing
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Good Customer Service
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Free Quotes
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Helps Educate Customers
Services Offered
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Architectural Glass
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Custom Window Designs
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Commercial Windows
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Double-Hung
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Sliding Glass
Port City Glass
Salisbury, MA-
No-Hassle Pricing
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Free Quotes
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Educational Website
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Good Customer Service
Services Offered
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Glass Showers
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Sliding Glass
Universal Windows Direct of Manchester
Manchester, NH-
Educational Website
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Locally Recognized for Quality
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Good Customer Service
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No-fee Quotes
Services Offered
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Custom Window Designs
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Sliding Glass
Traynor Glass Co. Inc
Hampstead, NH-
Excellent Customer Service
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No-fee Quotes
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No-Hassle Pricing
Services Offered
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Full-Service Installations
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Custom Windows
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Residential Windows
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Business Windows
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Sliding Glass
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Glass Showers
Exciting Windows
North Hampton, NH-
Educational Website
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Excellent Customer Service
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Consistent Workmanship
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Price Transparency
Services Offered
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Custom Windows
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Sliding Glass
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Double-Hung
How Installing Energy-Efficient Windows in Dover Saves You Money
Energy-efficient windows can benefit you in several ways. Here are a few reasons you may want to make the switch:
- Save on electricity bills: Switching to energy-efficient windows lowers your energy bills by about 12% because you need less energy.
- Protect your investment: The older your home is, the more likely it is that switching to energy-efficient windows will benefit you. Older homes tend to have windows that are outdated, drafty or maybe even damaged in some way. Upgrading your windows could help raise the value of your home if you decide to sell.
- Reduce your carbon footprint: You can reduce your indirect greenhouse gas emissions by about 12% when you install Energy Star certified windows. In Dover, that's about 152 pounds per year on average.
- Protect your valuables: The low-emissivity coatings on many Energy Star certified windows help prevent the fading of your floors, carpets and furniture by filtering out UV rays.
Estimated Cost of Window Replacement in Dover
When researching window installation, each company offers varying services and prices. Let's look at some typical costs and services.
How Much Do New Windows Cost?
According to our research, the typical cost of replacing a single window is about $600. However, window installation costs can range from $200 to $1,200 per window. But costs will vary considerably depending on your location, the quality of your products, the current condition of your home and the number of windows you need. Many window companies also offer door installations and other add-ons like shutters, baths, coating and more. Additional services will increase your overall project costs.
Keep in mind that energy-efficient windows may cost more, but Energy Star estimates the upgrade will save you between $101 and $583 a year when installing single-pane windows and between $27 and $197 a year when installing double-pane, clear glass windows. Your exact savings will vary depending on your local climate, energy rates and individual home characteristics.
We recommend requesting free quotes from multiple window installers to find the one that works best for your budget.
What Services do Window Installers Offer?
There are generally two kinds of window installation services: full-frame and pocket installations.
A full-frame installation is a total window replacement. It involves removing the old window, the sill, and the exterior and interior trim. It can also involve extra materials, such as insulation and drip edges, which increase the total cost of the project. It's also worth noting that it's not uncommon for homeowners to have to touch up the paint surrounding the window after a full-frame installation. A pocket installation entails installing a new window within the existing frame. This means instead of taking out the whole unit and rebuilding it, the window installer will just put the replacement window (also called a retrofit or insert window) into the frame.
If you're still debating which type of installation you should get, you can talk to your provider and get their recommendation. The decision mostly is influenced by the age of your window frames and if there's any damage.
Best Overall
Renewal by Andersen
- Award-winning company
- Member of US Green Building Council
- Manufactures products in-house
- No lifetime warranty
Best Affordability
Window World
- Low prices relative to competitors
- Great industry reputation
- Large serice area
- Quality of service will depend on your area
Best Warranty
Universal Windows Direct
- Lifetime warranty
- Wide variety of products and services
- Makes charitable contributions
- Limited service area
How We Choose the Best Window Installers in Dover
EcoWatch is different from most reviewers since we're examining these companies through a sustainability lens. Along with energy efficiency, we assessed each installer and assigned rankings using the following methodology:
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 picking new windows, the quality and breadth of services can often play just as important of a role in overall efficiency and performance as the brand of window you get. We do give window installers more points if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
Customer feedback is another very important review factor. If the majority of customers don't have positive feedback about their service from a certain company, it won't be featured on EcoWatch.
Cost
Cheaper windows certainly don't mean better windows, but we know many of our readers want to keep costs as low as possible. When analyzing the prices of providers, we gave higher scores to companies with reasonable prices and accessible financing rather than "cheaper" services.
Warranty
Protecting your investment in new windows is important to many homeowners. That's why window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Due to Dover's climate, homeowners need to be wary of rot, water damage and low efficiency. We factored in local experience to reflect the ability of Dover window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Dover, NH Window Replacement FAQs
How much does a window install cost?
The average cost to install one window ranges from $450 to $650. There are many factors that influence the cost, which include local labor costs, styles and sizes of windows, how energy-efficient the windows are, the number of windows, the materials used in designing the windows and your property's location.
What kind of window is the best for energy efficiency?
Generally, double-pane windows are more efficient than single-pane windows and windows that do not open will be more efficient than windows that do. To be sure you're getting the most energy-efficient windows, look for models with the blue Energy Star certification attached to them — they're certified energy-efficient by the U.S. Department of Energy.
Can you install your own windows?
Even though it is possible to install your own windows, doing so requires a lot of time and experience with home improvement projects. Hiring a professional can help guarantee that the installation is done properly and that you can avoid spending the time and effort of doing it yourself.
How long does window installation generally take?
Each window takes around 30 minutes to install based on the kind of window. However, the window installation can take two days or more if you have a lot of windows that must be installed.
Should I replace my windows all at the same time?
If you want to get more efficient windows and save money on energy costs, replacing all of your windows together is the only way to gain that benefit. However, if you have only one or two windows that are damaged or leaky, you can replace just those.