26 Best Window Replacement Companies in Portsmouth, NH (2023 Reviews)
Window Companies Near Me
If you're thinking of getting new windows, our list of the best window installation companies can help.
We analyzed all the top window installers in Portsmouth and selected the top 26 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
A review of the best window installation companies in Portsmouth may not seem like the most interesting article on the EcoWatch site, but trust us, windows impact your life more than you might think. Drafty windows can cost you in electricity bills. As a matter of fact, the Department of Energy estimates that about 30% of your home's heat or cool air could be lost through your windows.
Replacement windows improve your home's insulation, not only making you more comfortable during extreme temperatures, but also saving you money and helping the environment.
Efficient windows are particularly important in Portsmouth, where winters are long and cold. According to Energy Star, switching to energy-efficient windows can save the average homeowner up to $435 a year.
Best Overall
Renewal by Andersen
- Great industry reputation
- Award-winning company
- Member of US Green Building Council
- More expensive than competition
Best Affordability
Window World
- Low prices relative to competitors
- Lifetime warranty
- Great industry reputation
- Quality of service will depend on your area
Best Warranty
Universal Windows Direct
- Wide variety of products and services
- Manufactures products in-house
- Makes charitable contributions
- Limited service area
Best Window Replacement Companies in Portsmouth
The EcoWatch team evaluated dozens of companies that serve the Portsmouth area to find the best window installation companies by our standards. The providers mentioned in this article passed our review standards for energy-efficient offerings as well as price, local expertise, customer service and beyond.

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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More expensive than competition
Renewal by Andersen provides the best availability in Portsmouth. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has about 27 years of experience in the window replacement industry. Its reputation is backed by all the positive reviews from customers online.
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 offerings 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 Portsmouth?Andersen doesn't have any cost information available 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 inquire about a quote from the company.

Window World
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Low prices relative to competitors
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Lifetime warranty
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Great industry reputation
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Quality of service will depend on your area
Window World offers windows expertise in Portsmouth. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has over 27 years of experience in the windows industry, and it currently serves 200 locations nationwide. The provider has hundreds of glowing reviews from customers on online review websites.
You may want to consider going with Window World if you're looking for a installer 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 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. 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 Portsmouth?Prices aren't available on Window World's website, but it's known for offering some of the most affordable window installations around. For more accurate information on pricing, you can get a quote from the company.

Universal Windows Direct
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Wide variety of products and services
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Manufactures products in-house
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Makes charitable contributions
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Limited service area
Universal Windows Direct is a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This company has 20 years of experience in the window installation industry, and it has become one of the most reputable companies in the business. The company has hundreds of glowing reviews from customers on online review websites.
Universal may be the company for you if you're interested in one that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsThere are a wide range of window types that Universal Windows Direct offers, some of which are Energy Star products. The 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.
How much does Universal Windows Direct cost in Portsmouth?Pricing information is not available on Universal's website, as the cost of window installment depends on how many and what type(s) of windows you need. However, 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. You can request a free quote on its website for more information about the cost.

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 is 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 industry experience, and it currently serves 13 states and Washington D.C.
If you're looking for a company that installs windows and doors at businesses across the Eastern U.S, Aeroseal may be the company for you.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you mention that you want high-quality 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 Portsmouth?Though pricing is not available on Aeroseal's website, it provides high-quality windows at a competitive price point. Getting a free quote on its website is the best way to get more accurate information.
Please note that the companies in this section are national, which means the quality of customer service may vary depending on your local team. We have tried to remain unbiased and transparent by mentioning pros and cons for every provider.
More Window Replacement Companies in Portsmouth
Merrimack Valley Glass & Mirror
Newburyport, MA-
Free Quotes
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No-Hassle Pricing
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Educational Website
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Arrives on Time
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Window Designs
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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
Northern Glass LLC
Ipswich, MA-
Excellent Customer Service
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No-Hassle Pricing
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No-fee Quotes
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Dependable Service
Services Offered
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Residential Windows
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Glass Showers
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Tempered Glass
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Doors
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Custom Windows
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Full-Service Installations
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Commercial Windows
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Sliding Glass
The Window Source NH
Seabrook, NH-
Educational Website
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No-Hassle Pricing
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Free Quotes
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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-
Consistent Workmanship
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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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Residential Windows
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Fast Delivery
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Custom Window Designs
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Aluminum Window Frames
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Full-Service Installations
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Business Windows
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Sliding Glass
Timberlane Glass and Mirror
Plaistow, NH-
Price Transparency
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Good Customer Service
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Free Quotes
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Educational Website
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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Sliding Glass
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Commercial Windows
Southers Construction
Dover, NH-
Excellent Customer Service
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Helps Educate Customers
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Award-Winning
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No-fee Quotes
Services Offered
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Double-Hung
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Full-Service Installations
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Custom Windows
Pro Entry Installs LLC
Salem, NH-
Dependable Service
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Helps Educate Customers
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Reliable Appointment Windows
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Price Transparency
Services Offered
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Custom Window Designs
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Residential Windows
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Double-Hung
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Bay Windows
Window World of New Hampshire
Manchester, NH-
Free Quotes
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Excellent Customer Service
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No-Hassle Pricing
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Consistent Workmanship
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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Good 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-
Price Transparency
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Dependable Service
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Timely Service
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Locally Recognized for Quality
Services Offered
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Custom Windows
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Sliding Glass
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Double-Hung
Blind Gallery New England
Stratham, NH-
No-fee Quotes
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No-Hassle Pricing
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Excellent Customer Service
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Educational Website
Services Offered
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Custom Window Designs
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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-
Price Transparency
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Good Customer Service
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Free Quotes
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Locally Recognized for Quality
Services Offered
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Custom Window Designs
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Sliding Glass
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Business Windows
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Double-Hung
Atlantic Window Warehouse
Newburyport, MA-
Free Quotes
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Excellent Customer Service
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Price Transparency
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Reliable Appointment Windows
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
Methuen Glass 2
Methuen, MA-
Excellent Customer Service
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No-fee Quotes
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Educational Website
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No-Hassle Pricing
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
Glass Routes Co
Madbury, NH-
Price Transparency
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Excellent Customer Service
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No-fee Quotes
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Helps Educate Customers
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
Pella Windows & Doors of Newington
Newington, NH-
No-fee Quotes
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Price Transparency
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Helps Educate Customers
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Excellent Customer Service
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-
Educational Website
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No-fee Quotes
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No-Hassle Pricing
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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
HI Tech Window and Siding Installations Inc.
Methuen, MA-
Good Customer Service
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No-Hassle Pricing
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Locally Recognized for Quality
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No-fee Quotes
Services Offered
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Custom Windows
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Energy-Efficient Options
Universal Windows Direct of Manchester
Manchester, NH-
No-Hassle Pricing
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No-fee Quotes
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Locally Recognized for Quality
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Educational Website
Services Offered
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Custom Windows
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Sliding Glass
Patriot Exteriors
North Andover, MA-
Price Transparency
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Good Customer Service
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No-fee Quotes
Services Offered
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Residential Windows
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Custom Windows
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Aluminum Window Frames
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Commercial Windows
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Double-Hung
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Sliding Glass
Traynor Glass Co. Inc
Hampstead, NH-
Good Customer Service
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Price Transparency
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Free Quotes
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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Commercial Windows
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Sliding Glass
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Glass Showers
Tri-State Glass & Screen Repair
Lawrence, MA-
Good Customer Service
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No-Hassle Pricing
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Helps Educate Customers
Services Offered
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Residential Windows
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Tempered Glass
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Doors
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Custom Window Designs
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Business Windows
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Sliding Glass
Exciting Windows
North Hampton, NH-
Free Quotes
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Price Transparency
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Good Customer Service
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Consistent Workmanship
Services Offered
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Custom Window Designs
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Sliding Glass
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Double-Hung
Northlite Glass & Mirror
Derry, NH-
Excellent Customer Service
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Price Transparency
Services Offered
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Residential Windows
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Tempered Glass
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Doors
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Custom Window Designs
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Aluminum Window Frames
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Business Windows
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Sliding Glass
New Angle Glass Co
Haverhill, MA-
Free Quotes
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Award-Winning
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Excellent Customer Service
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Educational Website
Services Offered
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Custom Window Designs
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Glass Showers
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Commercial Windows
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Double-Hung
Budget Blinds of the Seacoast, Dover, and Wolfeboro
Portsmouth, NH-
Educational Website
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Good Customer Service
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Supports Charities
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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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Business Windows
How Installing Energy-Efficient Windows in Portsmouth Saves You Money
There are several benefits of switching to energy-efficient windows. Some reasons you may want to consider making the change include the following:
- Reduce your carbon footprint: Because energy-efficient windows improve the insulation in your house, you can lower your indirect greenhouse gas emissions by about 12%, according to Energy Star.
- Protect your valuables from fading: When you switch to energy-efficient windows with low-emissivity coatings, your floors, carpets and furniture will fade less because of their ability to filter out harmful UV rays.
- Protect your investment: If you have an older home, your windows are most likely outdated. Updating your windows can improve the insulation in your home and also help increase the value of your home if you decide to sell.
- Save on power bills: According to the Department of Energy, heat gained or lost through windows makes up about 25-30% of household energy use. Switching to energy-efficient models can help decrease how much energy is used in your home, therefore saving you about 12% more on your bills.
Estimated Cost of Window Replacement in Portsmouth
Windows come in different purposes, shapes and styles, so costs and services will vary greatly depending on several factors. Below, we describe the average cost and services that you can get from window replacement companies.
How Much Do New Windows Cost?
Though the typical of replacing a single window is about $600, it can range from $200 to $1,200. How much it will cost you is based on several factors, including the location of your home, size, number of windows, material, type and more.
With windows, efficiency is the most important factor for most homeowners. High efficiency windows may cost more off the bat, but by increasing the efficiency of your home — especially during the winter — they can give you many years of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save Portsmouth homeowners $435+ a year after replacing single-pane windows.
How much your window installation costs will also vary depending on the kind of material you choose for the frames. Wood windows are usually the most expensive, but it depends if they are completely wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are shown to be more efficient.
What Services do Window Installers Offer?
In general, there are two types of window installation services you can get: full-frame and pocket installations.
A full-frame installation replaces the complete window, such as the sill, frame, trim and the window panes. Because this type of installation requires more time, it will be more expensive than a pocket installation. A pocket installation entails replacing a window within the frame that's already there. So, instead of taking out the whole window and rebuilding it, the contractor will just put the replacement window (also called a retrofit or insert window) into the frame.
Your window installation company will be able to help you figure out what's best for your needs. In Portsmouth, the decision will mostly be based on the age of your windows and if there's any moisture damage. Wood can decay if it's not maintained properly over the years, so it's a good idea to have a professional assess your frames and window sills.
Best Overall
Renewal by Andersen
- Great industry reputation
- Award-winning company
- Member of US Green Building Council
- More expensive than competition
Best Affordability
Window World
- Low prices relative to competitors
- Lifetime warranty
- Great industry reputation
- Quality of service will depend on your area
Best Warranty
Universal Windows Direct
- Wide variety of products and services
- Manufactures products in-house
- Makes charitable contributions
- Limited service area
How We Choose the Best Window Installers in Portsmouth
In our search to find the most reliable, eco-friendly window installers in Portsmouth, the EcoWatch team landed on the above companies as the top window installation companies in the city. We have assessed the top window replacement companies in Portsmouth mostly based on their energy efficient offerings, as the most sustainable option also benefits homeowners in many ways. Energy-efficient windows can cut your electricity bills by hundreds of dollars. Along with energy efficiency, our rating methodology takes the following factors into consideration:
Service Area
Since this is a guide for Portsmouth, we paid more attention to companies that cover the city. There are certainly reputable providers that didn't make our list because of the low odds that they would serve the average homeowner in Portsmouth.
Work Quality
We're certain that you're looking for professionals who do a great job installing windows. We've vetted each installer included in our guide to ensure its contractors are well-qualified and that the company has gotten plenty of positive customer feedback to vouch for its service.
Customer Reviews
We analyzed patterns in recent online reviews to find the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction may be the most important factor, as it reflects the quality of services across nearly every category, including quality of installation, quality of parts, professionalism, cost, warranty and more.
Cost
Cheaper windows certainly don't mean better windows, but we know many of our readers would like to keep costs low when possible. When analyzing providers' prices, we gave higher scores to companies with reasonable prices and accessible financing rather than "cheaper" services.
Warranty
As discussed previously, windows are a significant investment, so you'll want to make sure that investment is protected. Window installation companies that give you lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have a good track record in the industry. Window installers that have more years of experience will earn higher rankings by our standards. We like to see at least ten years of experience.
Portsmouth, NH Window Replacement FAQs
What is the average cost to install new windows in a home?
The national average cost of installing one window is about $600 but can range between $200 and $1,200, based on a few different factors. The price is usually dependent on the location of your property, the type and material of the window and the size of the window. Also, remember that energy-efficient windows may cost more initially 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 various kinds of windows you can get for your home, such as transom windows, slider windows, double-hung and single-hung windows, picture windows, bay windows, awning windows and casement windows.
What do window installation companies do?
Window installers cover the entire process — from replacing your old windows with brand new ones to cleaning up after the installation. In addition, many companies offer window manufacturing, customization and repairs.
What time of year is the best time to replace my windows?
Replacement windows can be installed any time of the year, but warmer weather is typically better. No matter when you install them, the contractors will take steps to ensure that too much hot or cold air doesn't get into your home, so the temperature outside isn't necessarily a big factor. What's more important than the temperature is that the weather should be dry.
Should I replace my windows all at once?
If you're upgrading your windows to get more efficient windows, replacing all the windows at once is the only way to gain that benefit. However, if you have only a few windows that are broken or leaky, you can replace just those.