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
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Why you can trust EcoWatch
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 The Department of Energy estimates that heat or cool air lost through traditional or outdated windows could make up about 30% of residential energy climate usage.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That’s also bad for the environment, as the additional energy required by outdated windows increases your carbon footprint.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.
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
Best Energy-Efficient Features
DaBella
- Great warranty
- Friendly sales representatives
- Offers good financing options
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
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
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 WindowsIts 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
Great industry reputation
Award-winning company
Member of US Green Building Council
Manufactures products in-house
No lifetime warranty
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 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 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
Many years of experience
Great industry reputation
Low number of customer complaints
Manufactures products in-house
Custom Designs
No lifetime warranty
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 WindowsThe 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, MEEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Metal Frames
Double-Hung
Bay Windows
Vinyl Frames
Glass Doors
Energy-Efficient Options
Window Replacement/Installation
Custom Window Designs
DaBella
Salem, NHGood Customer Service
Timely Service
Services Offered
Double-Hung
Window Replacement/Installation
Glass Doors
Vinyl Frames
Great Bay Roofing & Exteriors
Rochester, NHGood Customer Service
Price Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Bay Windows
Skylights
Affordable Vinyl Windows & Siding Inc
Auburn, NHGood Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Vinyl Frames
Pro Entry Installs LLC
Salem, NHGood Customer Service
Price Transparency
Educational Website
Timely Service
Services Offered
Bay Windows
Glass Doors
Window Replacement/Installation
Double-Hung
Manny's Roofing
Pelham, NHGood Customer Service
Price Transparency
Free assessment
Timely Service
Educational Website
Services Offered
Window Replacement/Installation
Roof Windows
Skylights
First Choice Construction, LLC
Beverly, MAFree assessment
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Geno the Handyman
Stoneham, MAFree assessment
Timely Service
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Window Repair
Lighthouse Contracting Group, LLC
Gilford, NHFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Window Replacement/Installation
Mighty Dog Roofing Metro West Boston
Needham, MAGood Customer Service
Free assessment
Timely Service
Price Transparency
Services Offered
Window Repair
Skylights
Window Replacement/Installation
Dover Roofing LLC
Dover, NHPrice Transparency
Free assessment
Educational Website
Good Customer Service
Services Offered
Skylights
Window Replacement/Installation
Glass Routes Co
Madbury, NHFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Custom Glass
Vinyl Frames
Mirrors
Glass Showers
Window Replacement/Installation
Dependable J M R Siding
Manchester, NHFree assessment
Services Offered
Energy-Efficient Options
Vinyl Frames
Window Replacement/Installation
Dracut Window & Door
Dracut, MAPrice Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Odds & Ends Handyman Service
Salem, MAPrice Transparency
Services Offered
Glass Doors
Window Replacement/Installation
Cechinel Siding & Windows
Somerville, MAGood Customer Service
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Bay Windows
Boston Exterior Remodeling
Boston, MAPrice Transparency
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Quality Window & Door Inc
Weymouth, MAEducational Website
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
Energy-Efficient Options
Vinyl Frames
Bay Windows
Custom Window Designs
Country Glass
Hudson, MAPrice Transparency
Free assessment
Services Offered
Custom Glass
Energy-Efficient Options
Window Replacement/Installation
Glass Showers
Mirrors
Pella Windows & Doors of Newington
Newington, NHPrice Transparency
Educational Website
Good Customer Service
Free assessment
Services Offered
Double-Hung
Wood Frames
Glass Doors
Window Replacement/Installation
Bay Windows
Vinyl Frames
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
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.
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
Best Energy-Efficient Features
DaBella
- Great warranty
- Friendly sales representatives
- Offers good financing options
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.