20 Best Window Companies in Manassas, VA (2023 Reviews)

Are you looking to replace your windows? Our list of the best window installation companies can help you narrow down which one to pick.

We analyzed all the top-rated window companies in Manassas 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 September 15, 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 guide on the top window installation companies in Manassas may not seem like the most interesting article on the EcoWatch site, but trust us, windows impact your life more than you might think. Traditional or damaged windows could lead to spending more on energy bills during the winter or summer months.

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

Efficient windows are particularly important in Manassas, where the temperature varies throughout the year. According to Energy Star, making the switch to energy-efficient windows can save the average homeowner up to $359 each year.

Best Availability

Renewal by Andersen

★★★★★
4.5

  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house

Best Energy-Efficient Features

Champion

★★★★★
4.5

  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty

Window Veteran

Window World

★★★★★
4.5

  • EnergyStar Partner
  • Wide variety of products and services
  • Lifetime Warranty

Best Window Installation & Replacement Companies in Manassas

The EcoWatch Reviews team evaluated dozens of window installation companies in Manassas to find the top ones for our readers. The installers we've included in this article scored best in our categories, including energy-efficient offerings, price, customer service, availability 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 Manassas. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has been in the window installation business for about 27 years.

It 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 has 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 Manassas?

Window World doesn’t have any prices available on its website, but it's known for offering some of the most affordable window installations around. The best way to get more accurate pricing information is to ask for 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 provides the best availability in Manassas. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has been in the window installation business for about 27 years. The provider has plenty of 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

Renewal by Andersen is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Andersen representative when inquiring about services.

How much does Renewal by Andersen cost in Manassas?

Pricing details are not available on Andersen’s website, as the cost of window installment varies greatly 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 receive 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 is an installer that mainly serves commercial and multifamily properties, and also specializes in railings. If you’re looking for residential window installations, you should probably refer to one of the other companies on this list. This provider has 23 years of experience in the windows industry, and it has become one of the most respected companies in Manassas. Its reputation is backed by hundreds of positive reviews on customer review websites.

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

Energy Efficiency of Aeroseal Windows Windows

Aeroseal Windows is an Energy Star partner offering a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Aeroseal representative when inquiring about services.

How much does Aeroseal Windows cost in Manassas?

While prices are not available on Aeroseal’s website, it provides high-quality windows at a competitive price point. You can request a free quote on its website for more information about pricing.

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 provides the best warranty in Manassas. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. Universal has been in the window installation business for about 20 years. The provider has plenty of positive reviews from customers online.

It has an industry-leading warranty covering products, parts and workmanship for life.

Energy Efficiency of Universal Windows Direct Windows

Universal Windows Direct is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Universal representative when inquiring about services.

How much does Universal Windows Direct cost in Manassas?

Pricing details are not available on Universal’s website, as the cost of window installment varies greatly based 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. The best way to know for sure is to receive a free quote from the company.

Window Nation logo
FAST QUOTE
as little as 30 seconds
Best for Residential Windows

Window Nation

★★★★★
BBB Rating: A
Locations: Regional
Founded: 2006
Pros:
  • Pros icon Award-winning company
  • Pros icon Manufactures products in-house
  • Pros icon Custom designs
  • Pros icon Wide variety of products and services
Cons:
  • Pros icon Installation not covered by warranty
  • Pros icon Limited service area

Window Nation provides the best residential windows in Manassas. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has been in the window installation business for about 16 years. The provider has plenty of positive reviews from customers online.

It gives customers the opportunity to view products and to speak to a representative in person in its showrooms.

Energy Efficiency of Window Nation Windows

Window Nation is an Energy Star partner offering a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so make sure to ask your Window Nation representative when inquiring about services.

How much does Window Nation cost in Manassas?

Pricing details are not available on Window Nation’s website, as the cost of window installment varies greatly based on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay between $300 and $525 per window installed, making it a more affordable option compared to competitors. The best way to know for sure is to receive a free quote from the company.

We've recommended companies with good reputations, but note that these are national companies, so the quality of service may depend on your local crew. We have tried to stay unbiased and transparent by listing pros and cons for every company reviewed.

More Window Companies in Manassas

Renewal by Andersen of the Capital Region

Fairfax, VA
4.4
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

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

Website: https://www.renewalbyandersen.com/window-company/085-capital-region/about-us
Address: 2814 Merrilee Dr A, Fairfax, VA 22031
Phone: (703) 719-4052

Window World of Washington DC

Chantilly, VA
4.0
★★★★★
  • 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 Window Replacement
  • Service icon Residential Windows
  • Service icon Bay Windows
  • Service icon Custom Window Designs
  • Service icon Sliding Glass
  • Service icon Fast Delivery
  • Service icon Double-Hung

Website: https://www.windowworlddc.com/
Address: 4116 Walney Rd Suite J, Chantilly, VA 20151
Phone: (703) 378-7999

Window Nation

Lorton, VA
4.1
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

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

Website: https://www.windownation.com/northern-va-showroom
Address: 8198 Terminal Rd #105, Lorton, VA 22079
Phone: (703) 372-4540

American Home Contractors

Chantilly, VA
4.4
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Timely Service

Services Offered

  • Service icon Glass Showers
  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Aluminum Window Frames
  • Service icon Window Replacement
  • Service icon Fast Delivery

Website: https://www.americanhomecontractors.com/
Address: 14155 Sullyfield Cir Suite A, Chantilly, VA 20151
Phone: (703) 242-5000

Beyond Exteriors

Chantilly, VA
4.3
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.beyondexteriors.com/
Address: 14524 Lee Rd, Chantilly, VA 20151
Phone: (703) 997-9175

Universal Windows Direct of Northern Virginia

Chantilly, VA
4.2
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Custom Window Designs
  • Service icon Energy-Efficient Options
  • Service icon Glass Showers
  • Service icon Window Replacement
  • Service icon Residential Windows

Website: https://www.universalwindowsdirect.com/northern-virginia/
Address: 4005 Westfax Dr Suite A, Chantilly, VA 20151
Phone: (703) 705-4399

J.S. Jackson Construction Inc.

Nokesville, VA
4.2
★★★★★
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement
  • Service icon Double-Hung
  • Service icon Energy-Efficient Options
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Bay Windows
  • Service icon Aluminum Window Frames
  • Service icon Fast Delivery
  • Service icon Residential Windows

Website: http://jsjacksonconstruction.com/
Address: 7611 Greenwich Rd, Nokesville, VA 20181
Phone: (703) 753-9113

RIBA Construction, LLC

Fairfax, VA
4.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Window Replacement

Website: http://www.ribaconstruction.com/
Address: 11325 Random Hills Rd ste 360-A93, Fairfax, VA 22030
Phone: (703) 936-7744

Global Glass Pro

VA 20152, VA
4.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

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

Website: https://www.globalglasspro.com/
Address: Chantilly, VA 20152
Phone: (571) 327-6655

Potomac Glass Pro

Woodbridge, VA
4.3
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

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

Website: http://www.potomacglasspro.com/
Address: 1941 Heatherbrook Ct, Woodbridge, VA 22192
Phone: (571) 213-2205

Nu Look Roofing, Siding, and Windows

Fairfax, VA
4.3
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement
  • Service icon Fast Delivery
  • Service icon Energy-Efficient Options
  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Stained Glass
  • Service icon Residential Windows
  • Service icon Sliding Glass
  • Service icon Aluminum Window Frames

Website: https://nulookhomedesign.com/service-area/roofing/fairfax-va/
Address: 9990 Fairfax Blvd #180, Fairfax, VA 22030
Phone: (571) 655-3684

Adelphia Exteriors

Springfield, VA
4.4
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Educational Website

Services Offered

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

Website: https://www.adelphiaexteriors.com/
Address: 6371 Rolling Mill Pl STE 101, Springfield, VA 22152
Phone: (703) 386-7357

Advanced Window & Glass Repair, LLC

Woodbridge, VA
4.4
★★★★★
  • 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 Full-Service Installations
  • Service icon Window Repair
  • Service icon Tempered Glass
  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Window Replacement
  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Glass Showers
  • Service icon Sliding Glass

Website: http://advancedwindowglassrepair.com/
Address: 2159 Potomac Club Pkwy, Woodbridge, VA 22191
Phone: (571) 351-3692

Windows On Washington Ltd

Sterling, VA
4.4
★★★★★
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

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

Website: http://www.windowsonwashington.net/
Address: 23465 Rock Haven Way #120, Sterling, VA 20166
Phone: (703) 378-1190

The Window Man

Fairfax, VA
3.8
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement
  • Service icon Custom Window Designs
  • Service icon Residential Windows

Website: http://www.thewindowman.com/
Address: 3853-A Pickett Road, Fairfax, VA 22031
Phone: (703) 978-9888

Window Replacement DC - Reston

Reston, VA
4.5
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Aluminum Window Frames
  • Service icon Glass Showers
  • Service icon Window Repair
  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Fast Delivery
  • Service icon Window Replacement
  • Service icon Sliding Glass
  • Service icon Custom Window Designs
  • Service icon Residential Windows
  • Service icon Commercial Windows
  • Service icon Energy-Efficient Options

Website: https://window-replacement-dc.com/reston/
Address: 1890 Preston White Dr #383, Reston, VA 20191
Phone: (702) 703-3190

HB Services LLC

Fairfax, VA
4.3
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Timely Service

Services Offered

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

Website: https://www.hbhomeservices.com/
Address: 2987 Prosperity Ave, Fairfax, VA 22031
Phone: (703) 764-0498

Tri County Windows and Siding

Vienna, VA
4.3
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

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

Website: http://www.tricountywindowsva.com/
Address: 200 Lawyers Rd NW #1629, Vienna, VA 22183
Phone: (703) 472-6330

Window Replacement DC - Springfield

Springfield, VA
4.4
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Window Replacement
  • Service icon Aluminum Window Frames
  • Service icon Bay Windows
  • Service icon Fast Delivery
  • Service icon Window Repair
  • Service icon Sliding Glass
  • Service icon Energy-Efficient Options
  • Service icon Commercial Windows
  • Service icon Residential Windows
  • Service icon Glass Showers

Website: https://window-replacement-dc.com/springfield/
Address: 6136 Brandon Ave #179, Springfield, VA 22150
Phone: (702) 707-6072

Orion Home Improvements

Lorton, VA
4.3
★★★★★
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement
  • Service icon Fast Delivery
  • Service icon Residential Windows
  • Service icon Bay Windows
  • Service icon Commercial Windows
  • Service icon Custom Window Designs
  • Service icon Aluminum Window Frames

Website: https://www.orionhomeimprovements.com/
Address: 8433 Backlick Rd Suite C, Lorton, VA 22079
Phone: (571) 354-0331
Manassas Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Manassas, VA 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 Manassas Saves You Money

By switching to energy-efficient windows, you can take advantage of several benefits, such as:

  • More efficient energy usage in your home: Because the summers can get quite hot in Manassas, homeowners often rely on their air conditioner during that time. Energy-efficient windows cut back on how much cool air is lost through your windows, which makes it easier to keep your home cool.
  • Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes tend to have windows that are outdated, leaky or maybe even damaged in some way. Updating your windows could help raise the value of your home if you decide to sell.
  • More efficient energy use in your home: Because the winters can get very cold in Manassas, homeowners usually rely on their heater a lot. Energy-efficient windows reduce how much heat is lost through your windows, making it easier to keep your house warm.
  • Reduce your carbon footprint: Because energy-efficient windows improve the insulation in your house, you can cut your indirect greenhouse gas emissions by about 12%, according to Energy Star.

Estimated Cost of Window Replacement in Manassas

When researching window installation, each company offers varying services and costs. Let's look at some average costs and services.

How Much Do New Windows Cost?

The typical cost to install one window is about $600 but can range anywhere from $200 to $1,200. How much it will cost you varies depending on several factors, including type, size, material, the location of your home, number of windows and more.

With windows, efficiency is one of the most important factors for many homeowners. Efficient windows may cost more upfront, but by increasing the efficiency of your home — particularly during the summer and winter — they can provide many years of energy savings. According to Energy Star, buying certified energy-efficient windows can save Manassas homeowners $359+ a year after replacing single-pane windows.

Asking for free quotes from several installers is the best way to find out which one will work best for your budget.

What Services do Window Installers Offer?

The first thing to ask yourself when considering a window replacement is: Do you want a full-frame installation or a pocket installation?

Full-frame installations are usually done when you want to change the style of your windows or your window has a lot of rot. With this service, your professionals will replace the full window, including the frame, sill and trim. A pocket installation entails replacing a window without replacing the frame. This means instead of tearing out the whole window and rebuilding it, the contractor will just slide the replacement window (also called a retrofit or insert window) into the frame.

If you're still debating which kind of installation to get, you can ask your installer and get their recommendation. The decision mostly depends on how old the frames are 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

Best Energy-Efficient Features

Champion

★★★★★
4.5

  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty

Window Veteran

Window World

★★★★★
4.5

  • EnergyStar Partner
  • Wide variety of products and services
  • Lifetime Warranty

How We Choose the Best Window Installers in Manassas

The EcoWatch Reviews team differs from other reviewers since we evaluate these companies through a sustainability lens. Along with energy efficiency, we reviewed each installer and ranked them using the following methodology:

Service Area

Because this is a guide for Manassas, we gave more points to companies that cover the city. There are certainly other reputable providers that didn't make the cut because of the low odds that they would serve the average homeowner in Manassas.

Work Quality

When it comes to new windows, the quality and breadth of services can often play just as important of a role in overall efficiency and performance as the brand you choose. We do give window installers higher marks if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.

Customer Reviews

We analyzed patterns in recent customer feedback to find the companies with the most consistent customer satisfaction, weighted by sample size. Customer satisfaction may be the factor we place the most value on, as it reflects the quality of services across most other categories, including quality of installation, cost, quality of parts, warranty, professionalism and more.

Cost

Cheaper windows don't necessarily mean better windows, but we know many of our readers would like to keep costs low when possible. When analyzing providers' prices, we awarded higher points 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 be certain that investment is well protected. Window installation companies that have lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Last but not least, we like to see companies that have been in the industry for quite some time. Window installation companies that have more experience will earn higher rankings by our standards. We like to see at least ten years of experience.

Manassas, VA Window Replacement FAQs

How much does a window install cost?

The national average cost to replace a single window is around $600 but can range from $200 to $1,200, depending on a few different factors. The price is usually dependent on the size of the window, the location of your property and the type and material of the window. Also, bear in mind that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.

What kind of window is the most energy-efficient?

Generally, double-pane windows will be more efficient than single-pane windows and windows that do not open are more efficient than windows that do. If you want to be sure you'll get the most energy-efficient windows, look for models with the blue Energy Star certification — that means they're certified energy-efficient by the U.S. Department of Energy.

When should I use a window installation company?

Unless you have experience with home improvement projects and have all of the necessary tools to replace your own windows, we recommend hiring the pros. The process of installing windows is quite involved and can take anywhere from four to six hours for one window. Although it's tempting to try to save some money by doing it yourself, hiring a professional is a faster, more efficient and much safer alternative.

Should I replace all my windows at once?

If you're upgrading your windows to save on your energy bills, replacing all of the windows at the same time is the only way to see a noticeable difference. On the other hand, if you have just one or two windows that are damaged or leaky, you can replace just those.

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