20 Best Window Companies in Nashua, NH (2023 Reviews)
Are you looking to replace your windows? Our guide to the best window installation companies can help you narrow down which one to choose.
We analyzed all the top-rated window companies in Nashua 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 doing home renovations or have old windows, windows play a key role in conserving electricity in your home. The Department of Energy estimates that heat or cool air lost through outdated or drafty windows could be responsible for about 30% of residential energy climate usage. In Nashua, where the power bills are an average of $33 per month, that's almost $$120 per year wasted.
Luckily, helping you save energy with upgraded windows also helps our goals of reducing energy usage for the environment.
Efficient windows are particularly important in Nashua, where winters are long and cold. According to Energy Star, making the switch to energy-efficient windows can save the average homeowner up to $463 a year.
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 Nashua
The EcoWatch Reviews team researched many window installation companies across Nashua to narrow our list down to the best ones. The installers we've included in this article scored best in our categories, including energy-efficient offerings, price, customer service, 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 has windows expertise in Nashua. Window World has around 27 years of experience in the window installation business.
It has established itself as a company that 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 WindowsWindow World carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for Energy Star windows when inquiring. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.
How much does Window World cost in Nashua?Window World doesn’t have any prices listed on its website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate pricing information is to receive 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 has the best availability in Nashua. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the window installation business. Hundreds of positive reviews on customer review websites back the company's reputation.
It has established itself as a company 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 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 be sure to mention that you’re interested in Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Nashua?Andersen doesn’t have any prices listed 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. For more accurate information on the cost, you can get a 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 Nashua. Aeroseal has around 23 years of experience in the windows industry, and it currently serves 13 states and Washington D.C. Hundreds of positive reviews on customer review websites back the provider's reputation.
It installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows offers some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want Energy Star windows when inquiring. 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 Nashua?Aeroseal doesn’t have any cost information listed on its website, but it provides high-quality windows at a competitive price point. If you’d like more accurate pricing information, you can ask for a quote on the company’s website.

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 has the best warranty in Nashua. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has around 20 years of experience in the window installation business. Hundreds of positive reviews on customer review websites back the company'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 windows are Energy Star certified, so be sure to mention that you’re interested in Energy Star windows when inquiring.
How much does Universal Windows Direct cost in Nashua?Universal doesn’t have any prices listed 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. For more accurate information on the cost, you can get a quote from the company.
We've recommended providers with shining reputations, but bear in mind that some national companies have independently owned locations in Nashua, so your service may depend on your local crew. We have tried to be unbiased and transparent by including pros and cons for every company we reviewed.
More Window Companies in Nashua
Renewal by Andersen of Boston
Northborough, MA-
Price Transparency
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Free assessment
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Educational Website
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Good Customer Service
Services Offered
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Bay Windows
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Stained Glass
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Window Replacement
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Residential Windows
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Glass Showers
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Fast Delivery
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Sliding Glass
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Commercial Windows
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Double-Hung
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Custom Window Designs
Window World of New Hampshire
Manchester, NH-
Educational Website
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Free assessment
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Price Transparency
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Timely Service
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Good Customer Service
Services Offered
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Custom Window Designs
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Double-Hung
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Residential Windows
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Window Replacement
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Fast Delivery
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Bay Windows
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Sliding Glass
Nashua Glass
Nashua, NH-
Free assessment
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Good Customer Service
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Price Transparency
Services Offered
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Fast Delivery
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Commercial Windows
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Residential Windows
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Double-Hung
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Window Replacement
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Glass Showers
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Custom Window Designs
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Tempered Glass
Fiori Construction LLC
Londonderry, 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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Window Replacement
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Commercial Windows
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Residential Windows
Manny's Roofing
Pelham, NH-
Educational Website
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Free assessment
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Price Transparency
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Timely Service
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Good Customer Service
Services Offered
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Window Replacement
Granite State Glass
Hudson, NH-
Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Residential Windows
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Fast Delivery
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Glass Showers
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Custom Window Designs
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Window Replacement
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Commercial Windows
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Aluminum Window Frames
Dracut Window & Door
Dracut, MA-
Educational Website
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Price Transparency
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Free assessment
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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Window Replacement
PIC Home Pros
Londonderry, NH-
Educational Website
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Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Window Replacement
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Residential Windows
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Glass Showers
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Fast Delivery
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Custom Window Designs
S R Windows & Doors Plus Inc
Amherst, NH-
Price Transparency
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Good Customer Service
Services Offered
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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
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Sliding Glass
Pella Windows & Doors of Bedford
Bedford, NH-
Free assessment
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Educational Website
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Price Transparency
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Good Customer Service
Services Offered
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Window Replacement
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Residential Windows
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Bay Windows
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Double-Hung
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Custom Window Designs
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Sliding Glass
DaBella
Salem, NH-
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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Glass Showers
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Commercial Windows
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Window Replacement
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Custom Window Designs
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Bay Windows
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Double-Hung
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Residential Windows
Dependable J M R Siding
Manchester, NH-
Free assessment
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Price Transparency
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Good Customer Service
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Educational Website
Services Offered
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Residential Windows
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Double-Hung
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Custom Window Designs
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Sliding Glass
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Fast Delivery
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Commercial Windows
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Window Replacement
Guaranteed Aluminum & Vinyl Inc
Lowell, MA-
Good Customer Service
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Price Transparency
Services Offered
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Aluminum Window Frames
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Sliding Glass
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Commercial Windows
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Window Repair
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Bay Windows
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Double-Hung
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Residential Windows
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Custom Window Designs
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Window Replacement
Clear Choice Home Improvements
Manchester, NH-
Timely Service
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Good Customer Service
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Price Transparency
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Free assessment
Services Offered
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Custom Window Designs
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Residential Windows
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Bay Windows
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Window Replacement
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Double-Hung
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Fast Delivery
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Glass Showers
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Sliding Glass
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Commercial Windows
Rejean's Custom Quality Siding LLC
Manchester, NH-
Price Transparency
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Free assessment
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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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Commercial Windows
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Custom Window Designs
HI Tech Window and Siding Installations Inc.
Methuen, MA-
Educational Website
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Good Customer Service
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Free assessment
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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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Energy-Efficient Options
A Plus Energy Services
Milford, NH-
Educational Website
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Price Transparency
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Free assessment
Services Offered
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Window Replacement
Home Services at The Home Depot
Tewksbury, MA-
Good Customer Service
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Free assessment
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Price Transparency
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Educational Website
Services Offered
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Glass Showers
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Commercial Windows
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Residential Windows
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Double-Hung
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Window Replacement
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Fast Delivery
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Custom Window Designs
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Stained Glass
Universal Windows Direct of Manchester
Manchester, NH-
Educational Website
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Free assessment
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Good Customer Service
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Price Transparency
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Timely Service
Services Offered
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Double-Hung
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Full-Service Installations
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Residential Windows
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Commercial Windows
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Window Replacement
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Custom Window Designs
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Sliding Glass
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Bay Windows
O'Sullivan Installs
Billerica, MA-
Educational Website
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Free assessment
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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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Residential Windows
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Window Replacement
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Energy-Efficient Options
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Fast Delivery
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Custom Window Designs
Calculate how much you can expect to pay for window installation and replacement in Nashua, 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 Nashua Saves You Money
Switching to energy-efficient windows can improve the comfort of your home and help you save on energy bills. Here are more ways switching out your windows could help you:
- More efficient energy usage in your household: In Nashua where the winters can get cold, energy-efficient windows cut back on the amount of heat that is lost through your windows, making it easier to keep your house warm.
- Protect your investment: When your home is on the older side, your windows could also be outdated or drafty. Upgrading your windows is an important part of maintaining your property and its real estate value.
- Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
- Save money on electricity bills: The Department of Energy estimates that heat gained or lost via windows makes up about 25-30% of household energy use. Switching to energy-efficient windows can help reduce that number, which helps you save more on your bills.
Estimated Cost of Window Replacement in Nashua
Windows come in all shapes and sizes, so costs and services will differ tremendously. Here are the average costs and the primary services that you'll find from window installation companies.
How Much Do New Windows Cost?
Generally, Nashua homeowners can expect their window replacements to range from $250 to $1,200. The most common installations sit at about $600. How much it will cost is based on several factors, including the location of your home, material, number of windows, type, size and more.
It's important to keep in mind that windows with the best efficiency may cost more upfront but can save you hundreds of dollars via returns on your energy bills. Investing in Energy Star certified windows can save Nashua homeowners $463+ a year when replacing single-pane windows.
Something else that affects the total cost is the material of the frame you choose. Aluminum frames are generally the least pricey and are sturdy and relatively maintenance-free, but they offer poor insulation. On the other hand, wood frames cost the most, as they are aesthetically pleasing and offer decent insulation. Fiberglass and vinyl frames provide good insulation as well and cost somewhere between the other two.
What Services do Window Installers Offer?
In general, there are two kinds of window installation services you can get: full-frame and pocket installations.
Full-frame installations involve replacing the entire window — the sill, frame, trim and all. These are most common when you want to change the style of your window or when it has a great amount of deterioration. Full-frame installations are more involved and will increase overall costs. Pocket installations (also known as retrofits) are when you replace a window without replacing the frame. Pocket installations are on the simpler end and won't cost as much, but you can't do this kind of installment if you have any pre-existing rot or water damage.
Your window installation company will be able to help you decide what's best for your needs. In Nashua, the decision will mostly be based on the age of your home and if there's any damage. Wood can decay if it's not maintained properly over the years, so it's good to have a professional check on your frames and window sills.
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 Nashua
In our hunt to find the most reliable, eco-friendly window installers in Nashua, EcoWatch examined many companies before settling on these. Along with energy efficiency, we analyzed each installer and ranked them using the following methodology:
Service Area
This one is pretty self-explanatory, but we've chosen to highlight window installation companies that serve Nashua so you can find a quality window installation company near you.
Work Quality
When it comes to 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 give window installers more points if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed trends in recent online reviews to determine the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction might be the most important factor, as it indicates the quality of services across nearly every category, including quality of installation, professionalism, cost, quality of parts, warranty and more.
Cost
This one is a give-and-take: as with most services, cheap window installation companies won't always provide the most quality service. Still, we want to ensure we're highlighting companies that offer a variety of price and financing options so they're accessible to most homeowners.
Warranty
Protecting your investment in new windows is important to many homeowners. That's why window installation companies that give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Last but not least, we like to see companies that have a good track record in the industry. Window installation companies that have more years of experience earn higher rankings by our standards. We like to see at least ten years of experience.
Nashua, NH Window Replacement FAQs
How much should a window install cost?
The national average cost of installing one window is around $600 but can range from $200 to $1,200, based on a few different factors. The price is typically dependent on the location of your property, the size of the window and the type and material of the window. Also, remember that energy-efficient windows may cost more upfront but can save you a decent amount of money a year in energy bills.
What are the most common types of replacement windows?
There are several different types of windows you can get for your house, including double-hung and single-hung windows, awning windows, casement windows, picture windows, slider windows, transom windows and bay windows.
Can you replace 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 don't recommend doing it on your own.
When is it time to replace your windows?
Windows usually last about 20 to 30 years, but anytime you notice damage on your windows, it's a good idea to have an expert take a look at them to determine if they need any repairs or replacements.