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:

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

By EcoWatch Local Advisors

Updated March 14, 2023

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.

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

★★★★★
4.5

  • Great industry reputation
  • Award-winning company
  • Member of US Green Building Council
  • More expensive than competition

Best Affordability

Window World

★★★★★
4.5

  • Low prices relative to competitors
  • Lifetime warranty
  • Great industry reputation
  • Quality of service will depend on your area

Best Warranty

Universal Windows Direct

★★★★★
4

  • 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 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
Cons:
  • Pros icon 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 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 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 logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Low prices relative to competitors
  • Pros icon Lifetime warranty
  • Pros icon Great industry reputation
Cons:
  • Pros icon 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 Windows

Window 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 logo
FAST QUOTE
as little as 30 seconds
Best Warranty

Universal Windows Direct

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 2002
Pros:
  • Pros icon Wide variety of products and services
  • Pros icon Manufactures products in-house
  • Pros icon Makes charitable contributions
Cons:
  • Pros icon 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 Windows

There 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 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 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 Windows

Aeroseal 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
4.3
★★★★★
  • Pros icon Free Quotes
  • Pros icon No-Hassle Pricing
  • Pros icon Educational Website
  • Pros icon Arrives on Time

Services Offered

  • Service icon Double-Hung
  • Service icon Full-Service Installations
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Sliding Glass
  • Service icon Aluminum Window Frames
  • Service icon Glass Showers

Website: https://www.merrimackvalleyglass.com/
Address: 5 Perry Way #7, Newburyport, MA 01950
Phone: (978) 463-9990

Northern Glass LLC

Ipswich, MA
4.1
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon No-Hassle Pricing
  • Pros icon No-fee Quotes
  • Pros icon Dependable Service

Services Offered

  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Tempered Glass
  • Service icon Doors
  • Service icon Custom Windows
  • Service icon Full-Service Installations
  • Service icon Commercial Windows
  • Service icon Sliding Glass

Website: https://northern-glass.com/
Address: 29 Hayward St, Ipswich, MA 01938
Phone: (978) 356-7942

The Window Source NH

Seabrook, NH
4.0
★★★★★
  • Pros icon Educational Website
  • Pros icon No-Hassle Pricing
  • Pros icon Free Quotes
  • Pros icon Consistent Workmanship

Services Offered

  • Service icon Architectural Glass
  • Service icon Fast Delivery
  • Service icon Energy-Efficient Options
  • Service icon Custom Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

Website: http://www.windowsourcenh.com/
Address: 779 Lafayette Rd Suite 1, Seabrook, NH 03874
Phone: (888) 282-2912

Glass Unlimited

Wells, ME
3.9
★★★★★
  • Pros icon Consistent Workmanship
  • Pros icon No-fee Quotes
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames
  • Service icon Full-Service Installations
  • Service icon Business Windows
  • Service icon Sliding Glass

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

Timberlane Glass and Mirror

Plaistow, NH
3.7
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free Quotes
  • Pros icon Educational Website

Services Offered

  • Service icon Full-Service Installations
  • Service icon Custom Windows
  • Service icon Residential Windows
  • Service icon Sliding Glass
  • Service icon Commercial Windows

Website: http://www.timberlaneglass.com/
Address: 108 Main St, Plaistow, NH 03865
Phone: (603) 382-6969

Southers Construction

Dover, NH
3.7
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon Helps Educate Customers
  • Pros icon Award-Winning
  • Pros icon No-fee Quotes

Services Offered

  • Service icon Double-Hung
  • Service icon Full-Service Installations
  • Service icon Custom Windows

Website: http://southersconstruction.com/
Address: 12 Crosby Rd, Dover, NH 03820
Phone: (603) 605-8037

Pro Entry Installs LLC

Salem, NH
3.6
★★★★★
  • Pros icon Dependable Service
  • Pros icon Helps Educate Customers
  • Pros icon Reliable Appointment Windows
  • Pros icon Price Transparency

Services Offered

  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Double-Hung
  • Service icon Bay Windows

Website: https://proentry.com/
Address: 7 Cassidy Ave #2863, Salem, NH 03079
Phone: (603) 765-1312

Window World of New Hampshire

Manchester, NH
3.6
★★★★★
  • Pros icon Free Quotes
  • Pros icon Excellent Customer Service
  • Pros icon No-Hassle Pricing
  • Pros icon Consistent Workmanship

Services Offered

  • Service icon Custom Window Designs
  • Service icon Architectural Glass
  • Service icon Sliding Glass
  • Service icon Double-Hung

Website: https://www.windowworldnewhampshire.com/
Address: 735 E Industrial Park Dr Unit A, Manchester, NH 03109
Phone: (603) 935-9878

Demers Plate Glass Co

Haverhill, MA
3.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon No-fee Quotes

Services Offered

  • Service icon Residential Windows
  • Service icon Architectural Glass
  • Service icon Doors
  • Service icon Custom Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows

Website: https://www.demersplateglass.com/
Address: 373 River St, Haverhill, MA 01832
Phone: (978) 374-6387

Clear Choice Home Improvements

Manchester, NH
3.3
★★★★★
  • Pros icon Price Transparency
  • Pros icon Dependable Service
  • Pros icon Timely Service
  • Pros icon Locally Recognized for Quality

Services Offered

  • Service icon Custom Windows
  • Service icon Sliding Glass
  • Service icon Double-Hung

Website: http://www.clearchoicehomeimprovement.com/
Address: 8025 S Willow St #107, Manchester, NH 03103
Phone: (603) 232-0237

Blind Gallery New England

Stratham, NH
3.2
★★★★★
  • Pros icon No-fee Quotes
  • Pros icon No-Hassle Pricing
  • Pros icon Excellent Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames
  • Service icon Energy-Efficient Options
  • Service icon Sliding Glass

Website: http://www.blindgallerynewengland.com/
Address: 72 Portsmouth Ave, Stratham, NH 03885
Phone: (978) 857-1617

Alton Bay Blinds of New England

Hampton, NH
3.2
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free Quotes
  • Pros icon Locally Recognized for Quality

Services Offered

  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Business Windows
  • Service icon Double-Hung

Website: https://www.abblinds.com/
Address: 387 Lafayette Rd, Hampton, NH 03842
Phone: (603) 965-2114

Atlantic Window Warehouse

Newburyport, MA
3.2
★★★★★
  • Pros icon Free Quotes
  • Pros icon Excellent Customer Service
  • Pros icon Price Transparency
  • Pros icon Reliable Appointment Windows

Services Offered

  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Sliding Glass
  • Service icon Double-Hung

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

Methuen Glass 2

Methuen, MA
3.1
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon No-fee Quotes
  • Pros icon Educational Website
  • Pros icon No-Hassle Pricing

Services Offered

  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Sliding Glass

Website: http://www.methuenglass.com/
Address: 468 Merrimack St, Methuen, MA 01844
Phone: (978) 682-8233

Glass Routes Co

Madbury, NH
3.1
★★★★★
  • Pros icon Price Transparency
  • Pros icon Excellent Customer Service
  • Pros icon No-fee Quotes
  • Pros icon Helps Educate Customers

Services Offered

  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Sliding Glass

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

Pella Windows & Doors of Newington

Newington, NH
3.1
★★★★★
  • Pros icon No-fee Quotes
  • Pros icon Price Transparency
  • Pros icon Helps Educate Customers
  • Pros icon Excellent Customer Service

Services Offered

  • Service icon Architectural Glass
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

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

Port City Glass

Salisbury, MA
3.1
★★★★★
  • Pros icon Educational Website
  • Pros icon No-fee Quotes
  • Pros icon No-Hassle Pricing
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Custom Windows
  • Service icon Commercial Windows
  • Service icon Sliding Glass

Website: http://www.portcity-glass.com/
Address: 141 Bridge Rd, Salisbury, MA 01952
Phone: (978) 255-2803

HI Tech Window and Siding Installations Inc.

Methuen, MA
3.1
★★★★★
  • Pros icon Good Customer Service
  • Pros icon No-Hassle Pricing
  • Pros icon Locally Recognized for Quality
  • Pros icon No-fee Quotes

Services Offered

  • Service icon Custom Windows
  • Service icon Energy-Efficient Options

Website: http://www.hitechcorp.biz/
Address: 20 Aegean Dr #4, Methuen, MA 01844
Phone: (800) 851-0900

Universal Windows Direct of Manchester

Manchester, NH
3.1
★★★★★
  • Pros icon No-Hassle Pricing
  • Pros icon No-fee Quotes
  • Pros icon Locally Recognized for Quality
  • Pros icon Educational Website

Services Offered

  • Service icon Custom Windows
  • Service icon Sliding Glass

Website: http://www.universalwindowsmanchester.com/
Address: 720 E Industrial Park Dr #8, Manchester, NH 03109
Phone: (603) 218-3756

Patriot Exteriors

North Andover, MA
3.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon No-fee Quotes

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Windows
  • Service icon Aluminum Window Frames
  • Service icon Commercial Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

Website: https://www.patriotexteriors.net/
Address: 1 Massachusetts Ave, North Andover, MA 01845
Phone: (978) 957-0454

Traynor Glass Co. Inc

Hampstead, NH
3.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free Quotes

Services Offered

  • Service icon Full-Service Installations
  • Service icon Custom Windows
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Sliding Glass
  • Service icon Glass Showers

Website: http://www.traynorglass.com/
Address: 43 Gigante Dr, Hampstead, NH 03841
Phone: (603) 329-6668

Tri-State Glass & Screen Repair

Lawrence, MA
3.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon No-Hassle Pricing
  • Pros icon Helps Educate Customers

Services Offered

  • Service icon Residential Windows
  • Service icon Tempered Glass
  • Service icon Doors
  • Service icon Custom Window Designs
  • Service icon Business Windows
  • Service icon Sliding Glass

Website: http://www.tristateglassco.com/
Address: 84 S Broadway, Lawrence, MA 01843
Phone: (978) 687-0500

Exciting Windows

North Hampton, NH
3.0
★★★★★
  • Pros icon Free Quotes
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Consistent Workmanship

Services Offered

  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Double-Hung

Website: http://www.excitingwindows.net/
Address: 112 Lafayette Rd, North Hampton, NH 03862
Phone: (603) 964-7282

Northlite Glass & Mirror

Derry, NH
2.9
★★★★★
  • Pros icon Excellent Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Residential Windows
  • Service icon Tempered Glass
  • Service icon Doors
  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames
  • Service icon Business Windows
  • Service icon Sliding Glass

Website: http://www.northliteglass.com/
Address: 94 W Broadway, Derry, NH 03038
Phone: (603) 432-3277

New Angle Glass Co

Haverhill, MA
2.9
★★★★★
  • Pros icon Free Quotes
  • Pros icon Award-Winning
  • Pros icon Excellent Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Double-Hung

Website: http://www.newangleglass.com/
Address: 525 River St, Haverhill, MA 01832
Phone: (800) 642-7373

Budget Blinds of the Seacoast, Dover, and Wolfeboro

Portsmouth, NH
2.9
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Supports Charities
  • Pros icon Free Quotes

Services Offered

  • Service icon Custom Windows
  • Service icon Aluminum Window Frames
  • Service icon Energy-Efficient Options
  • Service icon Business Windows

Website: http://www.budgetblinds.com/the-seacoast-nh
Address: 105 Bartlett St # 4, Portsmouth, NH 03801
Phone: (603) 431-3888

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

★★★★★
4.5

  • Great industry reputation
  • Award-winning company
  • Member of US Green Building Council
  • More expensive than competition

Best Affordability

Window World

★★★★★
4.5

  • Low prices relative to competitors
  • Lifetime warranty
  • Great industry reputation
  • Quality of service will depend on your area

Best Warranty

Universal Windows Direct

★★★★★
4

  • 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.

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