26 Best Window Replacement Companies in Derry, NH (2023 Reviews)
Window Companies Near Me

Are you thinking about upgrading your windows? Our guide to the top window installation companies can help you narrow down which one to choose.

We analyzed all the top window installers in Derry 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 May 04, 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.

The EcoWatch Reviews team is all about finding solutions for eco-conscious homeowners in Derry. Drafty windows can reduce your home's energy efficiency by up to 30%, according to the Department of Energy. In Derry, that's an average of $435 per year that you could save on your power bills by making the switch.

Replacement windows improve your home's insulation, not only making you more comfortable during extreme temperatures, but also saving you some money and helping the environment.

We've put together a guide on the best installation companies to help you in your search, so you can not only take advantage of brand new windows, but also save money on your power bills.

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Member of US Green Building Council
  • Award-winning company
  • Manufactures products in-house
  • More expensive than competition

Best Affordability

Window World

★★★★★
4.5

  • Great industry reputation
  • EnergyStar Partner
  • Lifetime warranty
  • Quality of service will depend on your area

Best for Businesses

Aeroseal Windows

★★★★★
4

  • Custom Designs
  • Low number of customer complaints
  • Great industry reputation
  • Not ideal for residential installations

Best Window Replacement Companies in Derry

The EcoWatch team examined dozens of installers across the country to find the best window replacement companies for our readers. 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 Member of US Green Building Council
  • Pros icon Award-winning company
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon More expensive than competition

Renewal by Andersen provides the best availability in Derry. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the window installation industry. Hundreds of positive reviews from customers online back the company's reputation.

Andersen may be the company for you if you want 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 Windows

Renewal 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 Derry?

Even though pricing is not available on Andersen's website, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. If you'd like more accurate pricing information, you can receive a quote on the company's website.

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

Window World

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

Window World offers windows expertise in Derry. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has about 27 years of experience in the industry, and it currently provides services to 200 locations nationwide. Many positive reviews on customer review websites 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 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 be sure to mention that you're interested in Energy Star windows when inquiring.

How much does Window World cost in Derry?

Prices aren't mentioned on Window World's website, but it's known for offering some of the most affordable window installations around. Receiving a free quote on its website is the best way to know for sure.

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 Custom Designs
  • Pros icon Low number of customer complaints
  • Pros icon Great industry reputation
Cons:
  • Pros icon Not ideal for residential installations

Aeroseal Windows provides the best window installation for businesses in Derry. It's 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 about 23 years of experience in the window replacement industry. The provider has many glowing reviews from customers online.

Aeroseal may be the company for you if you want one that installs windows and doors at businesses across the Eastern U.S.

Energy Efficiency of Aeroseal Windows Windows

There 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 Derry?

Pricing details are not available on Aeroseal's website since the cost of window installment depends on how many and what type(s) of windows you need. However, 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 pricing information.

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 Makes charitable contributions
  • Pros icon Manufactures products in-house
  • Pros icon Wide variety of products and services
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Limited service area
  • Pros icon Some installations carried out by third-party contractors
  • Pros icon Quality of service will depend on your 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 been in business since 2002 and currently services 27 states nationwide.

Universal may be the company for you if you want one that has an industry-leading warranty covering products, parts and workmanship for life.

Energy Efficiency of Universal Windows Direct Windows

Universal Windows Direct appeals to eco-conscious consumers by providing energy-efficient window offerings. 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 Derry?

While pricing information is not readily available on Universal's website, 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 information.

We strive to stay unbiased and transparent by including pros and cons for every company. Additionally, any partnerships do not affect our rankings.

More Window Replacement Companies in Derry

Merrimack Valley Glass & Mirror

Newburyport, MA
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service

Services Offered

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

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

Nashua Glass

Nashua, NH
4.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Award-Winning
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Showers
  • Service icon Tempered Glass
  • Service icon Sliding Glass
  • Service icon Double-Hung
  • Service icon Custom Window Designs
  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Residential Windows

Website: http://www.nashuaglass.com/
Address: 110 Chestnut St, Nashua, NH 03060
Phone: (603) 882-0648

Clear Choice Home Improvements

Manchester, NH
4.0
★★★★★
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Award-Winning

Services Offered

  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Glass Showers
  • Service icon Residential Windows
  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Commercial Windows
  • Service icon Fast Delivery

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

Marquis Roofing

Manchester, NH
4.0
★★★★★
  • Pros icon Award-Winning
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Fast Delivery
  • Service icon Double-Hung
  • Service icon Residential Windows
  • Service icon Stained Glass

Website: https://marquisroofing.com/
Address: 106 W River Dr Ste 4, Manchester, NH 03104
Phone: (603) 825-4140

Accurate Glass Crafters LLC.

Haverhill, MA
4.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Sliding Glass
  • Service icon Double-Hung
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Tempered Glass
  • Service icon Full-Service Installations
  • Service icon Glass Showers
  • Service icon Fast Delivery

Website: http://accurateglasscrafters.com/
Address: 96 River St, Haverhill, MA 01832
Phone: (978) 809-8179

Window World of New Hampshire

Manchester, NH
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

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

M&M Skylights

Brentwood, NH
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Timely Service

Services Offered

  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Double-Hung
  • Service icon Custom Window Designs
  • Service icon Fast Delivery
  • Service icon Residential Windows
  • Service icon Energy-Efficient Options

Website: https://skylightspecialist.com/m-and-m-skylights
Address: 183 NH-125 Unit 13, Brentwood, NH 03833
Phone: (978) 945-9412

Mr. Handyman of Lowell, Andover and Haverhill

Tyngsborough, MA
3.9
★★★★★
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Award-Winning
  • Pros icon Price Transparency

Services Offered

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

Website: https://www.mrhandyman.com/lowell-andover-haverhill/
Address: 30 Westech Dr, Tyngsborough, MA 01879
Phone: (978) 307-6905

The Window Source NH

Seabrook, NH
3.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Award-Winning

Services Offered

  • Service icon Residential Windows
  • Service icon Sliding Glass
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Energy-Efficient Options
  • Service icon Double-Hung

Website: https://www.windowsourcenh.com/
Address: 779 Lafayette Rd Suite 1, Seabrook, NH 03874
Phone: (844) 423-3023

Northfield Handyman Services

Haverhill, MA
3.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Showers
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Double-Hung

Website: https://www.northfieldhandyman.com/
Address: 57 Stage St, Haverhill, MA 01830
Phone: (978) 685-0568

R&M Glass

Tewksbury, MA
3.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

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

Website: http://www.buildwithglass.com/
Address: 120 Lumber Ln, Tewksbury, MA 01876
Phone: (781) 454-5611

Dependable J M R Siding

Manchester, NH
3.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: https://jmrsiding.com/
Address: 65 Pine Island Rd, Manchester, NH 03103
Phone: (603) 669-5020

Portland Glass of Hooksett/Manchester

Hooksett, NH
3.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

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

Website: https://www.portlandglass.com/hooksett/
Address: 1118 Hooksett Rd, Hooksett, NH 03106
Phone: (603) 945-2642

Minuteman Floors

Manchester, NH
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

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

Website: https://www.minutemanfloors.com/
Address: 66 Hanover St #200, Manchester, NH 03101
Phone: (866) 248-2312

Universal Windows Direct of Manchester

Manchester, NH
3.8
★★★★★
  • Pros icon Award-Winning
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Residential Windows
  • Service icon Custom Window Designs
  • Service icon Energy-Efficient Options
  • Service icon Sliding Glass
  • Service icon Commercial Windows

Website: https://universalwindowsmanchester.com/
Address: 880 Candia Rd #8, Manchester, NH 03109
Phone: (603) 218-3756

Elite Roofing and Siding Massachusetts

Lowell, MA
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Fast Delivery
  • Service icon Sliding Glass
  • Service icon Commercial Windows
  • Service icon Glass Showers
  • Service icon Residential Windows

Website: https://www.choicerenovators.com/
Address: 240 Jackson St, Lowell, MA 01852
Phone: (978) 634-3831

Home Services at The Home Depot

Methuen, MA
3.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Double-Hung
  • Service icon Glass Showers
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows

Website: https://www.homedepot.com/l/Methuen/MA/Methuen/01844/2685/services
Address: 72 Pleasant Valley St, Methuen, MA 01844
Phone: (978) 216-9836

Pane Free Glass

Manchester, NH
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Residential Windows
  • Service icon Fast Delivery
  • Service icon Commercial Windows
  • Service icon Glass Showers
  • Service icon Full-Service Installations
  • Service icon Sliding Glass
  • Service icon Custom Window Designs

Website: http://panefreeglass.com/
Address: 270 Amory St #17, Manchester, NH 03102
Phone: (603) 497-1830

Corporate Office for Pella of Boston

Haverhill, MA
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Energy-Efficient Options
  • Service icon Residential Windows
  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Sliding Glass

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

Guaranteed Aluminum & Vinyl Inc

Lowell, MA
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: https://lowell-window-replacement-glass-repair.com/
Address: 349 Bridge St, Lowell, MA 01850
Phone: (978) 452-2392

Pro Entry Installs LLC

Salem, NH
3.8
★★★★★
  • Pros icon Award-Winning
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Timely Service

Services Offered

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

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

Woodland HomeWorks

Billerica, MA
3.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Fast Delivery
  • Service icon Custom Window Designs

Website: https://www.woodlandhomeworks.com/
Address: 83 Alexander Rd STE 3, Billerica, MA 01821
Phone: (978) 487-6921

Northern Glass LLC

Ipswich, MA
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

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

Portland Glass of Methuen

Methuen, MA
3.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

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

Website: https://www.portlandglass.com/salem/
Address: 602 Lowell St, Methuen, MA 01844
Phone: (603) 945-2845

Portland Glass of Nashua

Nashua, NH
3.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

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

Website: https://www.portlandglass.com/nashua/
Address: 450 Amherst St, Nashua, NH 03063
Phone: (603) 945-2241

Traynor Glass Co. Inc

Hampstead, NH
3.8
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

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

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

How Installing Energy-Efficient Windows in Derry Saves You Money

By upgrading to energy-efficient windows, you and your family can enjoy several benefits, including:

  • Reduce your carbon footprint: Reducing the amount of energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by 152 pounds per year on average.
  • Save money on energy bills: The Department of Energy estimates that heat gained or lost through windows makes up around 25-30% of household energy use. Installing energy-efficient windows can help reduce that amount, which helps you save more on your bills.
  • Protect your valuables from fading: When you switch to energy-efficient windows that have low-emissivity coatings, your floors, carpets and furniture will be protected from fading due to their ability to filter out damaging UV rays.
  • 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, leaky or maybe even damaged in some way. Upgrading your windows could help increase the value of your home if you decide to sell.

Estimated Cost of Window Replacement in Derry

Windows come in different styles, shapes and purposes, so costs and services will vary remarkably based on your project. Below, we describe the typical cost and services that you'll find from window installation companies.

How Much Do New Windows Cost?

On average, Derry homeowners can expect their replacement window installations to range from $250 to $1,200. The average cost sits at approximately $600. But costs vary considerably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window companies also provide door installations and replacements, which will add extra costs to your project.

With windows, efficiency is the most important factor for many homeowners. Efficient windows may cost more off the bat, but by increasing the efficiency of your home — especially during the winter — they can provide many years of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save Derry homeowners $435+ per year after replacing single-pane windows.

Another factor that influences the overall cost is the material you choose for your frame. Aluminum frames are generally the least expensive and are sturdy and light, but they offer poor insulation. On the other hand, wood frames cost the most because they are aesthetically pleasing and offer decent insulation. Fiberglass and vinyl frames provide good insulation as well and cost somewhere between the other two.

What Services do Window Installers Offer?

There are typically two kinds of window replacement services: full-frame and pocket installations.

Full-frame installations require replacing the whole window — the sill, frame, trim and all. These are most common when you want a new style for your windows or when it has significant rot or deterioration. Full-frame installations involve more time and labor and will increase overall costs. Pocket installations are simpler and won't carry as large a bill because they involve simply replacing the window within its existing frame. But if the frame has any damage or rot, you should opt for a full-frame installation instead.

Your window installation company will be able to recommend the best type for your project. In Derry, the choice will mostly be influenced by how much damage there is currently and the age of your existing frames.

Best Overall

Renewal by Andersen

★★★★★
4.5

  • Member of US Green Building Council
  • Award-winning company
  • Manufactures products in-house
  • More expensive than competition

Best Affordability

Window World

★★★★★
4.5

  • Great industry reputation
  • EnergyStar Partner
  • Lifetime warranty
  • Quality of service will depend on your area

Best for Businesses

Aeroseal Windows

★★★★★
4

  • Custom Designs
  • Low number of customer complaints
  • Great industry reputation
  • Not ideal for residential installations

How We Choose the Best Window Installers in Derry

In our hunt to make your home improvements easier and more eco-friendly in Derry, the EcoWatch team landed on the above companies as the top window installation companies in the city. Along with energy efficiency, we analyzed each installer and assigned rankings using the following methodology:

Service Area

Since this is a guide for Derry, we only included companies that cover the city. There are other reputable providers that didn't make the cut because they wouldn't be able to serve homeowners in Derry.

Work Quality

We're certain that you're looking for professionals who do a great job installing windows. We've vetted each company on this list to make sure its technicians are well-qualified and that the company has received lots of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed patterns in recent online reviews to determine the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction might be the most important factor, as it indicates the quality of services across most other categories, including professionalism, quality of installation, quality of parts, warranty, 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. Still, we want to make sure we're highlighting companies that provide a spectrum of price and financing options so they're accessible to most homeowners.

Warranty

Protecting your investment in new windows is important. That's why window installation companies that provide lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Because of Derry's climate, homeowners will want to mitigate rot, low efficiency and water damage. We factored in local experience to reflect the ability of Derry window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.

Derry, NH Window Replacement FAQs

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

The national average cost to replace one window is around $600 but can range between $200 and $1,200, depending on several factors. The price is generally dependent on the type and material of the window, the size of the window and the location of your property. Also, bear in mind that energy-efficient windows may cost more upfront but can save you a decent amount of money a year in energy bills.

What kind of window is the best for energy efficiency?

A window's energy efficiency is affected by several factors, including the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are usually the most energy-efficient since they are certified by the U.S. Department of Energy.

Can I install my own windows?

If you're handy and have experience with similar home improvement projects, it's possible to install your own windows. However, if you don't have the time or experience, we don't recommend doing it on your own.

How long does it usually take to install windows?

Since the average installation time of a window is 30 minutes, about 16 windows can be installed in a typical 8-hour work day.

What time of year is the best time to replace my windows?

Replacement windows can be installed during any season, but autumn might be best. Regardless of when you install them, the contractors will take steps to make sure that too much hot or cold air doesn't get into the home, so the temperature outside isn't necessarily a big factor. Most importantly, the weather should be dry.

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