20 Best Window Companies in Portsmouth, NH (2023 Reviews)
Thinking about replacing your home's windows? We've got all the information you need in this list of the top window installation companies.
We analyzed all the top-rated window companies in Portsmouth and selected the best 20 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
Why you can trust EcoWatch
Whether you're updating for aesthetics or have damaged windows, windows play a crucial role in conserving electricity in your home. Traditional, outdated windows can cost you in electric bills. As a matter of fact, the Department of Energy estimates that 25-30% of your house's heat or cool air could be lost through your windows.
Fortunately, saving you money with more efficient windows also helps our goals of conserving energy and the resources it takes to generate it.
Unlike other review sites, EcoWatch ranks window installation companies on energy efficiency while also taking into consideration cost, customer satisfaction and service area.
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 Portsmouth
The EcoWatch team evaluated many window installation companies in Portsmouth to find the best ones for our readers. The providers reviewed in this article scored best in our categories, which include 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 Portsmouth. This provider has 27 years of experience in the windows industry, and it has established itself as one of the most respected companies in Portsmouth. Hundreds of positive reviews from customers online back the company's reputation.
Window World may be the company for you if you're looking for one 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’s commitment to sustainability shows in its energy-efficient window offerings. 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 displayed on Window World’s website, but it's known for offering some of the most affordable window installations around. The best way to know for sure is to ask for 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 Portsmouth. This provider has 27 years of experience in the windows industry, and it has established itself as one of the most respected companies in Portsmouth. Hundreds of positive reviews from customers online back the company's reputation.
Andersen may be the company for you if you're looking for 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’s commitment to sustainability shows in its 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 Portsmouth?Prices aren’t displayed on Andersen’s website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to know for sure is to ask for a free quote from the company.

Aeroseal Windows
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Many years of experience
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Great industry reputation
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Low number of customer complaints
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Manufactures products in-house
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Custom Designs
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No lifetime warranty
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Not ideal for residential installations
Aeroseal Windows 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. This provider has 23 years of experience in the windows industry, and it has proved to be one of the most reputable companies in the business. Its reputation is backed by a considerable amount of positive reviews on customer review websites.
It 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 Portsmouth?Prices are not available on Aeroseal’s website since the cost of window installment varies greatly depending on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. If you’d like more accurate information, you can get 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 Portsmouth. 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 replacement industry.
It has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsThe company offers energy-efficient UniShield brand windows. According to its website, UniShield window packages have higher gas fill rates and longer gas retention than most other brands on the market, and they are Energy Star products. Not all of Universal’s windows are Energy Star certified, so make sure you mention that you’d like Energy Star windows when inquiring.
How much does Universal Windows Direct cost in Portsmouth?Prices are not available on Universal’s website because the cost of window installment varies greatly depending 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. Getting a free quote on its website is the best way to get more accurate pricing information.
We have tried to be unbiased and transparent by including pros and cons for each company. Additionally, any partnerships do not influence our reviews.
More Window Companies in Portsmouth
Renewal by Andersen Window Replacement
Saco, ME-
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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Bay Windows
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Aluminum Window Frames
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Fast Delivery
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Window Replacement
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Sliding Glass
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Energy-Efficient Options
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Custom Window Designs
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Double-Hung
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Full-Service Installations
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Residential Windows
Window World of New Hampshire
Manchester, NH-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
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Timely Service
Services Offered
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Bay Windows
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Fast Delivery
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Custom Window Designs
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Sliding Glass
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Window Replacement
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Double-Hung
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Residential Windows
Pella Windows & Doors of Newington
Newington, 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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Residential Windows
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Double-Hung
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Custom Window Designs
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Window Replacement
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Fast Delivery
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Bay Windows
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Sliding Glass
Granite State Glass
Portsmouth, NH-
Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Aluminum Window Frames
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Glass Showers
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Custom Window Designs
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Residential Windows
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Fast Delivery
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Commercial Windows
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Window Replacement
The Window Source NH
Seabrook, 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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Residential Windows
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Sliding Glass
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Custom Window Designs
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Bay Windows
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Double-Hung
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Window Replacement
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Energy-Efficient Options
Portland Glass of Dover
Dover, 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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Window Replacement
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Commercial Windows
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Custom Window Designs
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Residential Windows
Focalpoint Renovations
Seabrook, NH-
Educational Website
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Price Transparency
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Free assessment
Services Offered
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Window Replacement
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Commercial Windows
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Full-Service Installations
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Residential Windows
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Glass Showers
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Custom Window Designs
Window Woman of New England
Amesbury, MA-
Price Transparency
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Good Customer Service
Services Offered
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Residential Windows
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Window Repair
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Energy-Efficient Options
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Window Replacement
Atlantic Window Warehouse
Newburyport, MA-
Price Transparency
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Educational Website
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Good Customer Service
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Timely Service
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Free assessment
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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Double-Hung
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Window Replacement
Refined Home Services
Atkinson, NH-
Price Transparency
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Free assessment
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Timely Service
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Educational Website
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Good Customer Service
Services Offered
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Double-Hung
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Window Replacement
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Commercial Windows
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Glass Showers
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Custom Window Designs
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Residential Windows
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Stained Glass
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Fast Delivery
Corporate Office for Pella of Boston
Haverhill, MA-
Good Customer Service
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Educational Website
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Free assessment
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Price Transparency
Services Offered
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Sliding Glass
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Custom Window Designs
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Window Replacement
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Bay Windows
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Energy-Efficient Options
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Residential Windows
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Commercial Windows
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Double-Hung
Northern Glass LLC
Ipswich, MA-
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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Tempered Glass
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Commercial Windows
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Glass Showers
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Window Replacement
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Custom Window Designs
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Sliding Glass
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Residential Windows
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Full-Service Installations
DaBella
Salem, NH-
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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Glass Showers
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Double-Hung
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Window Replacement
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Custom Window Designs
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Residential Windows
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Commercial Windows
Millwork Masters
413 Boston St, MA-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Energy-Efficient Options
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Residential Windows
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Window Replacement
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Fast Delivery
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Custom Window Designs
Universal Windows Direct of Manchester
Manchester, NH-
Free assessment
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Educational Website
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Good Customer Service
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Price Transparency
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Timely Service
Services Offered
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Full-Service Installations
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Commercial Windows
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Bay Windows
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Custom Window Designs
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Sliding Glass
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Residential Windows
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Double-Hung
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Window Replacement
Portland Glass of Biddeford
Biddeford, ME-
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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Custom Window Designs
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Commercial Windows
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Residential Windows
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Glass Showers
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Window Replacement
Morgan Exteriors
Hooksett, NH-
Good Customer Service
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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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Double-Hung
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Window Replacement
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Residential Windows
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Sliding Glass
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Bay Windows
HI Tech Window and Siding Installations Inc.
Methuen, MA-
Free assessment
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Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Residential Windows
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Custom Window Designs
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Energy-Efficient Options
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Window Replacement
Manny's Roofing
Pelham, NH-
Timely Service
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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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Commercial Windows
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Window Replacement
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Custom Window Designs
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Residential Windows
Fiori Construction LLC
Londonderry, NH-
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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Custom Window Designs
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Window Replacement
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Commercial Windows
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Residential Windows
Calculate how much you can expect to pay for window installation and replacement in Portsmouth, 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 Portsmouth Saves You Money
Energy-efficient windows can benefit you in more than one way. Here are a few reasons you may want to take the plunge and make the switch:
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
- More efficient energy use in your household: Because the winters can get cold in Portsmouth, homeowners usually rely on their heater a lot. Energy-efficient windows decrease how much heat is lost through your windows, making it easier to keep your home warm.
- Save money on energy bills: Because energy-efficient windows decrease the amount of energy needed to heat or cool your home, they can help you save around $435 annually on your energy bills in Portsmouth.
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes tend to have windows that are outdated, drafty or maybe even damaged in some way. Updating your windows could help increase the value of your home if you decide to sell.
Estimated Cost of Window Replacement in Portsmouth
Windows come in different shapes and sizes, so costs and services will differ considerably. Here are the average costs and the primary services that you'll find from the average window installation company.
How Much Do New Windows Cost?
The typical cost to replace a single window is about $600 but can range anywhere from $200 to $1,200. Costs will differ considerably based on the current condition of your home, the number of windows you need, the quality of your products and your location. Many window companies also offer door installations and other add-ons like coating, baths, shutters and more. Additional services will increase your overall project costs.
Keep in mind that energy-efficient windows may have a higher price, but Energy Star estimates the upgrade will save you between $101 and $583 per year when you install single-pane windows and between $27 and $197 per year when you install double-pane, clear glass windows. These savings vary depending on your local climate, energy rates and individual home characteristics.
How much your window installation costs will also vary depending on the type of window material you choose for the frames. Wood windows are usually the most expensive, though it depends if they are solid wood or clad with aluminum or vinyl. Fiberglass windows also tend to be somewhat more expensive than vinyl, but they are shown to be more efficient.
What Services do Window Installers Offer?
The first step of a window replacement is to figure out whether you need a full-frame or pocket installation.
Full-frame installations are usually done when you want a new style or your window has significant deterioration. With this service, your installers will replace the whole window, including the sill, trim and frame. Pocket installations (or retrofits) involve installing a new window within the existing frame, which makes pocket installations more simple and affordable. However, if the frame has any damage or rot, you should opt for a full-frame installation instead.
Your window installer should be able to help you choose which type of installation you need.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Portsmouth
EcoWatch differs from other reviewers, as we assess these companies through a sustainability lens. We have evaluated the best window replacement companies in Portsmouth mostly based on their energy efficient offerings, as it's the most sustainable option and the best one for homeowners. Energy Star certified windows can reduce your energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:
Service Area
This one is pretty self-explanatory, but we've chosen to highlight window installation companies that serve Portsmouth so you can find the right window installation company near you.
Work Quality
When selecting new windows, the quality and range of services often plays just as important of a role in insulation and performance as the brand of window you get. We do rate window installers higher if they offer high-quality products, but we also factor in 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. Customer satisfaction may be the most important factor, as it indicates the quality of services across nearly every category, including quality of parts, quality of installation, warranty, professionalism, cost and more.
Cost
This one is a give-and-take: as with other services, cheap window companies are not going to provide the most quality service. On the other hand, we want to make sure we're highlighting companies that provide a wide range of price and financing options so they're accessible to most homeowners.
Warranty
Protecting your investment in new windows is important. For that reason, window installation companies that offer lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Portsmouth's climate, homeowners will want to mitigate low efficiency, rot and water damage. We factored in local experience to reflect the ability of Portsmouth window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Portsmouth, NH Window Replacement FAQs
How much does window installation cost?
The average cost to install a window ranges between $450 and $650. There are many factors that influence how much it costs, including how energy-efficient the windows are, the number of windows, local labor costs, styles and sizes of windows, the materials used in designing the windows and your property's location.
What are the different types of windows?
There are various types of windows you can get for your home, including awning windows, casement windows, picture windows, bay windows, slider windows, double-hung and single-hung windows and transom windows.
Do I really need to use a window installation company?
You should hire a window installation company whenever you need to upgrade your windows. Installing windows is a complicated process that can be difficult and time-consuming, so it's best handled by the professionals.
Should I replace all my windows at the same time?
If you're upgrading your windows because of energy-efficiency, replacing all the windows at the same time is the only way to gain that benefit. On the other hand, if you have only one or two windows that are damaged or drafty, you can replace just those.