20 Best Window Companies in Portsmouth, NH (2024 Reviews)

Looking to improve your home’s energy efficiency? The top window replacement companies can help.

We analyzed all the top-rated window companies in Portsmouth and selected the best 20 based on:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated May 20, 2024

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

Whether you're updating for style or have windows that need repairs, windows play a key role in conserving your home's electricity. The Department of Energy estimates that heat or cool air lost through traditional or outdated windows could make up about 30% of residential energy climate usage. In Portsmouth, where the power bills are an average of $33 per month, that’s almost $$120 per year wasted.

That’s also bad for the environment, as the additional energy required by outdated windows increases your carbon footprint.

So if you’re building a new home, renovating or changing out old windows in Portsmouth, you’ve found the best place to get started.

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
Buy One Window, Get One 40% OFF
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

Best Window Installation & Replacement Companies in Portsmouth

The EcoWatch Reviews team researched dozens of installers across the country to find the best window installation companies for our readers. We assessed the providers on energy-efficient offerings, local experience, coverage area, price, customer service and more.

Window World logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Quality of service will depend on your area

Window World has windows expertise in Portsmouth. Window World has around 27 years of experience in the windows industry, and it currently serves 200 locations nationwide.

You may want to consider opting for Window World if you're interested in 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 Windows

Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s windows are Energy Star certified, so make sure you mention that you’re interested in Energy Star windows when inquiring.

How much does Window World cost in Portsmouth?

Prices are not available on Window World’s website, as the cost of window replacement differs based on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. The best way to know for sure is to get a free quote from the company.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen has the best availability in Portsmouth. Andersen has around 27 years of experience in the windows industry, and it currently serves nearly every state except Mississippi and West Virginia.

You may want to consider opting for Andersen if you're interested in 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 Windows

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. Not all of Andersen’s windows are Energy Star certified, so make sure you mention that you’re interested in Energy Star windows when inquiring.

How much does Renewal by Andersen cost in Portsmouth?

Prices are not available on Andersen’s website, as the cost of window replacement differs based on how many and what type(s) of windows you need. However, 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 get a free quote from the company.

Aeroseal Windows logo
FAST QUOTE
as little as 30 seconds
Best for Businesses

Aeroseal Windows

★★★★★
BBB Rating: A+
Locations: Regional
Founded: 1999
Pros:
  • Pros icon Many years of experience
  • Pros icon Great industry reputation
  • Pros icon Low number of customer complaints
  • Pros icon Manufactures products in-house
  • Pros icon Custom Designs
Cons:
  • Pros icon No lifetime warranty
  • Pros icon Not ideal for residential installations

Aeroseal Windows has the best window installation for businesses in Portsmouth. Aeroseal has around 23 years of experience in the windows industry, and it currently serves 13 states and Washington D.C.

You may want to consider opting for Aeroseal if you're interested in a company that installs windows and doors at businesses across the Eastern U.S.

Energy Efficiency of Aeroseal Windows Windows

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. Not all of Aeroseal’s windows are Energy Star certified, so make sure you mention that you’re interested in Energy Star windows when inquiring.

How much does Aeroseal Windows cost in Portsmouth?

Prices are not available on Aeroseal’s website, as the cost of window replacement differs based on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. The best way to know for sure is to get a free quote from the company.

One thing to note is that the companies in this section are national, which means the quality of customer service may depend on your local team. We have tried to stay unbiased and transparent by including pros and cons for each company.

More Window Companies in Portsmouth

Renewal by Andersen Window Replacement

Saco, ME
4.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Metal Frames
  • Service icon Window Replacement/Installation
  • Service icon Bay Windows
  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Vinyl Frames

Website: https://windowsdoorsportland.com/
Address: 66 Industrial Park Rd, Saco, ME 04072
Phone: (207) 358-6094

DaBella

Salem, NH
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Timely Service

Services Offered

  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames

Website: https://dabella.us/location/salem/
Address: 13 Red Roof Ln Suite 201, Salem, NH 03079
Phone: (603) 691-2339

Pella Windows & Doors of Newington

Newington, NH
4.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Wood Frames
  • Service icon Vinyl Frames
  • Service icon Bay Windows

Website: https://www.pellabranch.com/new-england/showrooms/newington/
Address: 25 Fox Run Rd Suite 2, Newington, NH 03801
Phone: (603) 725-4690

Portland Glass of Portsmouth

Portsmouth, NH
4.6
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Repair
  • Service icon Glass Showers

Website: https://www.portlandglass.com/portsmouth/
Address: 70 Heritage Ave, Portsmouth, NH 03801
Phone: (603) 945-2324

Glass Routes Co

Madbury, NH
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames
  • Service icon Glass Showers
  • Service icon Custom Glass
  • Service icon Mirrors

Website: http://www.glassroutes.net/
Address: 181 Littleworth Rd, Madbury, NH 03823
Phone: (603) 742-2600

Southers Construction

Dover, NH
4.2
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Timely Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Bay Windows

Website: http://southersconstruction.com/
Address: 12 Crosby Rd, Dover, NH 03820
Phone: (603) 734-4572

Portland Glass of Dover

Dover, NH
4.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Glass Repair
  • Service icon Window Replacement/Installation

Website: https://www.portlandglass.com/dover/
Address: 119 New Rochester Rd, Dover, NH 03820
Phone: (603) 716-9167

The Window Source NH

Seabrook, NH
4.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Bay Windows
  • Service icon Vinyl Frames
  • Service icon Storm/Impact Windows

Website: https://www.windowsourcenh.com/
Address: 779 Lafayette Rd Suite 1, Seabrook, NH 03874
Phone: (603) 764-7212

Clearview Sunroom & Window LLC

Barrington, NH
4.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation

Website: http://www.clearviewsunroom.com/
Address: 1037 Calef Hwy, Barrington, NH 03825
Phone: (603) 750-7577

Interstate Glass & Mirror Inc

Somersworth, NH
4.6
★★★★★
  • Pros icon Price Transparency

Services Offered

  • Service icon Screen Repair
  • Service icon Glass Doors
  • Service icon Glass Showers
  • Service icon Window Replacement/Installation
  • Service icon Mirrors
  • Service icon Bay Windows

Website: http://interstateglass.com/
Address: 228 NH-108, Somersworth, NH 03878
Phone: (603) 742-0600

Granite State Glass

Portsmouth, NH
3.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Showers
  • Service icon Window Replacement/Installation
  • Service icon Screen Repair

Website: http://granitestateglass.com/
Address: 1 Mirona Rd, Portsmouth, NH 03801
Phone: (603) 436-0001

Dover Roofing LLC

Dover, NH
2.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Skylights

Website: https://doverroofingcontractors.com/
Address: 120 Durham Rd, Dover, NH 03820
Phone: (603) 498-5741

Nick's Door And Window

Portsmouth, NH
2.8
★★★★★

    Services Offered

    • Service icon Window Replacement/Installation
    • Service icon Glass Doors

    Website: http://nicksdw.com/
    Address: 199 Constitution Ave # 6, Portsmouth, NH 03801
    Phone: (603) 433-3346

    Broken Glass Company

    Wells, ME
    4.5
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Educational Website

    Services Offered

    • Service icon Custom Glass
    • Service icon Glass Doors
    • Service icon Window Replacement/Installation
    • Service icon Glass Showers
    • Service icon Skylights
    • Service icon Glass Repair

    Website: https://brokenglassco.com/
    Address: 223 Post Rd, Wells, ME 04090
    Phone: (207) 216-9931

    Norton Exteriors

    Epping, NH
    3.3
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Free assessment
    • Pros icon Timely Service
    • Pros icon Price Transparency

    Services Offered

    • Service icon Window Replacement/Installation

    Website: https://nortonexteriorsnh.com/
    Address: 252 Calef Hwy, Epping, NH 03042
    Phone: (603) 434-6468

    Atlantic Window Warehouse

    Newburyport, MA
    3.4
    ★★★★★
    • Pros icon Free assessment
    • Pros icon Educational Website
    • Pros icon Timely Service
    • Pros icon Price Transparency
    • Pros icon Good Customer Service

    Services Offered

    • Service icon Glass Repair
    • Service icon Vinyl Frames
    • Service icon Screen Repair
    • Service icon Glass Doors
    • Service icon Window Replacement/Installation

    Website: https://www.atlwindow.com/
    Address: 155 State St, Newburyport, MA 01950
    Phone: (978) 465-9696

    Great Bay Roofing & Exteriors

    Rochester, NH
    3.3
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Good Customer Service
    • Pros icon Educational Website
    • Pros icon Free assessment

    Services Offered

    • Service icon Window Replacement/Installation
    • Service icon Skylights
    • Service icon Bay Windows

    Website: https://www.greatbayroofing.com/
    Address: 12 N Main St, Rochester, NH 03867
    Phone: (603) 748-7254

    Corporate Office for Pella of Boston

    Haverhill, MA
    4.2
    ★★★★★
    • Pros icon Free assessment
    • Pros icon Good Customer Service
    • Pros icon Educational Website
    • Pros icon Price Transparency

    Services Offered

    • Service icon Window Replacement/Installation
    • Service icon Bay Windows
    • Service icon Double-Hung
    • Service icon Glass Doors

    Website: https://www.pellabranch.com/boston/
    Address: 45 Fondi Rd, Haverhill, MA 01832
    Phone: (978) 373-2500

    Affordable Vinyl Windows & Siding Inc

    Auburn, NH
    5.0
    ★★★★★
    • Pros icon Price Transparency
    • Pros icon Good Customer Service

    Services Offered

    • Service icon Window Replacement/Installation
    • Service icon Vinyl Frames

    Website: http://www.affordwindow.com/
    Address: 320 Rockingham Rd STE 5, Auburn, NH 03032
    Phone: (603) 647-7474

    Glass Unlimited

    Wells, ME
    2.9
    ★★★★★
    • Pros icon Good Customer Service
    • Pros icon Price Transparency
    • Pros icon Free assessment
    • Pros icon Timely Service

    Services Offered

    • Service icon Window Replacement/Installation
    • Service icon Wood Frames
    • Service icon Energy-Efficient Options
    • Service icon Glass Showers
    • Service icon Glass Doors
    • Service icon Mirrors
    • Service icon Custom Glass

    Website: https://www.glassunlimitedme.com/
    Address: 1213 Post Rd, Wells, ME 04090
    Phone: (207) 646-8268
    Portsmouth Window Cost Calculator

    Calculate how much you can expect to pay for window installation and replacement in Portsmouth, NH using our customized window cost calculator.

    Estimated Window Cost:
    161 homeowners have requested a free estimate in the last 3 days.

    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

    Switching to energy-efficient windows can help improve the comfort of your home and help you save on power bills. Here are more ways switching out your windows could help you:

    • Protect your investment: If your home is on the older side, your windows are most likely outdated. Upgrading your windows can make your home more comfortable and also help increase the value of your property if you decide to sell.
    • Decrease your carbon footprint: You can reduce your carbon footprint by about 12% after you install Energy Star certified windows. In Portsmouth, that’s about 152 pounds per year on average.
    • Save on energy bills: Switching to energy-efficient windows lowers your energy bills by about 12% because you need less energy.
    • Protect your valuables from fading: When you switch to energy-efficient windows with low-emissivity coatings, your floors, carpets and furniture will be protected from fading due to their ability to filter out harmful UV rays.

    Estimated Cost of Window Replacement in Portsmouth

    Windows come in varying shapes and sizes, so costs and services will differ considerably. Here are the average costs and services that you’ll find from the average window installation company.

    How Much Do New Windows Cost?

    Although the national average cost of replacing one window is around $600, it can range from $200 to $1,200. Costs will vary considerably depending on your location, the number of windows you need, the quality of your products and the current condition of your home. Many window companies also offer door installations and other add-ons like baths, coating, shutters and more. Additional services will increase your overall project costs.

    Whether or not you want energy-efficient windows is another factor that will affect the cost. These will usually cost more than other windows, but on the other hand, you can save about $435 a year on your energy bills in Portsmouth.

    Costs will also vary depending on the material you want for your window frames. Aluminum frames have the lowest price. They’re sturdy, light and maintenance-free, but offer poor insulation. Vinyl frames are a bit more expensive and offer good insulation. Composite frames made from wood fibers encased in plastic also provide good insulation and are moderately expensive. Wood frames cost the most and are the most in-demand. They’re also aesthetically pleasing and provide decent insulation for your home.

    What Services do Window Installers Offer?

    The first step when considering an installation is to think about whether you need a full-frame or pocket installation.

    A full-frame installation is a total window replacement. This service involves removing the old window, the sill, and the exterior and interior trim. It can also involve other materials, such as insulation and drip edges, which increase the total cost of the project. Also worth noting: you may have to touch up the paint around the window after a full-frame installation. A pocket installation entails replacing a window within the existing frame, which tends to be less expensive than a full-frame installation.

    If you’re still debating which kind of installation you should get, you can ask your provider and get their recommendation. The choice mostly is influenced by the age of your window frames and if there’s any damage present.

    Best Availability

    Renewal by Andersen

    ★★★★★
    4.5
    • Great industry reputation
    • Member of US Green Building Council
    • Manufactures products in-house
    Buy One Window, Get One 40% OFF
    Get Estimate

    Power Home

    ★★★★★
    4.5
    • Uses eco-friendly materials
    • Well-trained, certified installers
    • Lifetime or lengthy warranty
    Next-Day Appointments Available
    Get Estimate

    Best for Residential Windows

    Window Nation

    ★★★★★
    4.0
    • Custom Designs
    • Wide variety of products and services
    • Manufactures products in-house

    How We Choose the Best Window Installers in Portsmouth

    EcoWatch reviews differ from other reviews, as we look at these companies through a sustainability lens. We’ve evaluated the top window replacement companies in Portsmouth mostly based on energy efficiency, as it’s what’s best for the environment and for you as a homeowner. Energy Star certified windows have been shown to lower power bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:

    Service Area

    Since this is a guide for Portsmouth, we only included companies that provide services to 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

    When installing new windows, the quality and range of services can often play just as important of a role in overall efficiency and performance as the type of window you choose. 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 patterns in recent online reviews to find the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction might be the most important factor, as it reflects the quality of services across nearly every category, including professionalism, warranty, quality of installation, quality of parts, cost and more.

    Cost

    Cheaper windows certainly don’t mean better windows, but we know many of our readers try to keep costs as low as possible. When analyzing providers’ prices, we awarded higher scores to companies with reasonable prices and accessible financing rather than “cheaper” services.

    Warranty

    Protecting your investment in new windows is important to many homeowners. For that reason, window installation companies that have lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

    Years of Experience

    Because of Portsmouth’s climate, homeowners need to be wary of 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

    What is the average cost to replace windows in a home?

    The average cost to replace one window ranges from $450 to $650. There are a variety of factors that affect the cost, which include your property’s location, how energy-efficient the windows are, local labor costs, styles and sizes of windows, the number of windows and the materials used in designing the windows.

    What are the most common kinds of replacement windows?

    There are various types of windows you can get for your house, such as slider windows, bay windows, double-hung and single-hung windows, transom windows, awning windows, picture windows and casement windows.

    When should I use a window installation company?

    You should use a window installation company whenever you need to replace your windows. Installing windows is a involved process that can be difficult to do on your own, so it’s best left to the professionals.

    When is the best time of year to replace windows?

    Replacement windows can be installed at any time, but autumn might be the best season. No matter when you install them, the contractors will take steps to make sure that too much hot or cold air doesn’t get into your home, so the temperature outside doesn’t necessarily matter that much. Most importantly, the weather should be dry.

    Should I replace all my windows at once?

    If your windows are greater than 20 years old, you probably need to replace all of them. At that point, they are typically less efficient, leakier and/or more damaged than new windows. Doing your windows all at the same time will involve less paperwork and less stress.