20 Best Window Companies in George Mason, VA (2025 Reviews)
Are you looking to upgrade your windows? Our list of the best window installation companies can help you choose the right one for you.
We analyzed all the top-rated window companies in George Mason 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
A review of the top window replacement companies in George Mason may not seem like the most captivating article on EcoWatch, but trust us, windows have a more direct impact on your life than you might realize. If your house has old or damaged windows, your AC or heater could be working extra hard to heat or cool your home. This means higher power bills.
That’s bad for your wallet and the environment, but one of the top window installation companies can help you with that.
Efficient windows are especially important in George Mason, where the temperature varies throughout the year. According to Energy Star, switching to energy-efficient windows can save the average homeowner up to $359 per year.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
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 Window Installation & Replacement Companies in George Mason
The EcoWatch Reviews team researched dozens of window providers across George Mason to narrow our list down to the top ones. The companies mentioned in this article scored best in our categories, including energy-efficient offerings, customer service, availability, price 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 George Mason. Window World has been in the window business for about 27 years.
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 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 be sure to mention that you want Energy Star windows when inquiring.
How much does Window World cost in George Mason?Pricing details are not available on Window World’s website because the cost of window replacement depends 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. Requesting a free quote on its website is the best way to get more accurate information.

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 George Mason. Andersen has been in the window business for about 27 years.
You may want to consider going with Andersen if you're looking for a installer 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 be sure to mention that you want Energy Star windows when inquiring.
How much does Renewal by Andersen cost in George Mason?Pricing details are not available on Andersen’s website because the cost of window replacement depends 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. Requesting a free quote on its website is the best way to get more accurate information.

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 George Mason. Aeroseal has been in the window business for about 23 years.
You may want to consider going with Aeroseal if you're looking for a installer 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 be sure to mention that you want Energy Star windows when inquiring.
How much does Aeroseal Windows cost in George Mason?Pricing details are not available on Aeroseal’s website because the cost of window replacement depends on how many and what type(s) of windows you need. However, it provides high-quality windows at a competitive price point. Requesting a free quote on its website is the best way to get more accurate information.

Window Nation
Award-winning company
Manufactures products in-house
Custom designs
Wide variety of products and services
Installation not covered by warranty
Limited service area
Window Nation has the best residential windows in George Mason. Window Nation has been in the window business for about 16 years.
You may want to consider going with Window Nation if you're looking for a installer that gives customers the opportunity to view products and to speak to a representative in person in its showrooms.
Energy Efficiency of Window Nation WindowsEach product has windowpanes coated with a Low-E (low emissivity) glaze that prevents damaging UV rays from heating your home. Plus, the spaces between double- and triple-pane windows are filled with argon gas that’s been proven to improve home insulation. Not all of Window Nation’s windows are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.
How much does Window Nation cost in George Mason?Pricing details are not available on Window Nation’s website because the cost of window replacement depends 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. Requesting a free quote on its website is the best way to get more accurate information.
We’ve recommended companies with shining reputations, but bear in mind that some national companies have independently owned locations in George Mason, so the quality of service may depend on your local crew. We have tried to be unbiased and transparent by mentioning pros and cons for every company reviewed.
More Window Companies in George Mason
Renewal by Andersen of the Capital Region
North Bethesda, MDPrice Transparency
Free assessment
Educational Website
Good Customer Service
Services Offered
Bay Windows
Window Replacement/Installation
Double-Hung
Skylights
Glass Doors
Champion Replacement Windows of Baltimore
Rosedale, MDGood Customer Service
Free assessment
Sunrooms
Products made in the USA
Single-source accountability
Price Transparency
Services Offered
Window Replacement/Installation
Glass Doors
Bay Windows
Double-Hung
Window Nation
Glen Burnie, MDFree assessment
Educational Website
Price Transparency
Services Offered
Glass Doors
Energy-Efficient Options
Bay Windows
Triple Pane Glass
Double-Hung
Vinyl Frames
Wood Frames
Custom Window Designs
Window Replacement/Installation
Tri County Windows and Siding
Vienna, VAFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Skylights
Glass Doors
Window Replacement/Installation
Bay Windows
Custom Window Designs
Double-Hung
Bright Side Exteriors
Centreville, VAFree assessment
Services Offered
Window Repair
Glass Doors
Window Replacement/Installation
DISTRICT CAPITOL GLASS LLC
Alexandria, VAGood Customer Service
Price Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Glass Showers
Glass Repair
Mirrors
Glass Doors
Screen Repair
Window Repair
Old Town Glass & Window Repair
Alexandria, VALarge online project gallery
Affordable prices
Price Transparency
Free assessment
Good Customer Service
Third-generation glassier
Services Offered
Glass Doors
Glass Showers
Mirrors
Window Replacement/Installation
Custom Glass
Glass Repair
Home Exteriors LLC.
Manassas, VAGood Customer Service
Price Transparency
Educational Website
Timely Service
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Advanced Window & Glass Repair, LLC
Woodbridge, VAEducational Website
Timely Service
Free assessment
Good Customer Service
Price Transparency
Services Offered
Mirrors
Glass Doors
Fiberglass Frames
Glass Repair
Energy-Efficient Options
Glass Showers
Double-Hung
Window Repair
Custom Glass
Window Replacement/Installation
Vinyl Frames
Bay Windows
Tempered Glass
Anderson Glass Contractors - Frameless Shower Door, Glass Door in Alexandria VA
Marlow Heights, MDFree assessment
Good Customer Service
Price Transparency
Free in-person consultation
Custom glass services
Educational Website
24-hour emergency availability
Services Offered
Glass Repair
Window Replacement/Installation
Custom Glass
Glass Doors
Mirrors
Glass Showers
KELEMER BROTHERS REPLACEMENT WINDOWS
Silver Spring, MDFree assessment
Price Transparency
Educational Website
Services Offered
Energy-Efficient Options
Window Replacement/Installation
C2 Operations
Leesburg, VAFree assessment
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Glass Doors
Double-Hung
Capitol Improvements - Roofing & Siding Contractor
Bowie, MDGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Milcon Design & Build
Waterford, VAPrice Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Potomac Windows & Doors
Fredericksburg, VAPrice Transparency
Services Offered
Window Replacement/Installation
American Remodel
Annapolis, MDEducational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
AC Matthews, Roofing & Exteriors
Towson, MDEducational Website
Good Customer Service
All-inclusive repair and maintenance
High-quality materials
Energy-efficient windows
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Garrety Glass - Betterliving Sunrooms
Cockeysville, MDTimely Service
Price Transparency
Educational Website
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Mirrors
Custom Glass
Glass Showers
Glass Repair
Bay Windows
Obrebski Brothers Windows and Doors
Nottingham, MDFree assessment
Good Customer Service
Lifetime guarantee
Family service
Educational Website
Financing options available
Services Offered
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
Pella Windows & Doors of Tysons Corner
Vienna, VAEducational Website
Free assessment
Good Customer Service
Price Transparency
Services Offered
Double-Hung
Window Replacement/Installation
Glass Doors
Wood Frames
Vinyl Frames
Calculate how much you can expect to pay for window installation and replacement in George Mason, VA 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 George Mason Saves You Money
Energy-efficient windows can provide benefits in more than one way. Here are some reasons you may want to take the plunge and make the switch:
- Protect your investment: Upgrading your windows is an important part of maintaining your property and its real estate value, particularly if you have an older home.
- Reduce your carbon footprint: By using less energy once switching to energy-efficient windows, you’ll also be cutting your indirect greenhouse gas emissions by about 12%, according to Energy Star.
- Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out harmful UV rays, preventing your furniture, carpet and other valuables from fading.
- Save money on power bills: Because energy-efficient windows lower the amount of energy needed to heat or cool your home, they can help you save about $359 annually on your energy bills in George Mason.
Estimated Cost of Window Replacement in George Mason
When looking into window installation, each company offers varying services and costs. Let’s look at some typical costs and services.
How Much Do New Windows Cost?
The national average cost to replace a single window is about $600 but can range anywhere from $200 to $1,200. 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 installers also provide door installations and replacements, which will add extra costs to your project.
It’s also worth noting that energy-efficient windows will typically cost more initially, but Energy Star predicts that upgrading the windows on your George Mason home translates to an average energy savings of $236 to $319 per year for single-pane window replacement, or between $87 to $126 per year for double-pane windows. How much you’ll save by installing energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.
The cost of your window installation will also vary depending on the kind of material you choose for the frames. Wood windows are generally the most expensive, but it depends on whether they are solid wood or clad with aluminum or vinyl. Fiberglass windows also tend to be somewhat more expensive than vinyl, but they are shown to be more efficient.
What Services do Window Installers Offer?
In general, there are two kinds of window replacement services you can get: full-frame and pocket installations.
A full-frame installation is a replacement of the full window. This service involves taking out the old window, the sill, and the exterior and interior trim. It also involves extra materials, such as insulation and drip edges, which raise 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. Pocket installations (or retrofits) entail replacing a window within the existing frame, which makes pocket installations take less time and therefore cost less. But, if the frame has any rot or deterioration, 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 George Mason, the decision will mostly depend on how much damage there is currently and how old your existing frames are.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
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
How We Choose the Best Window Installers in George Mason
In our search to make your home improvements easier and more eco-friendly in George Mason, the EcoWatch team examined dozens of companies before deciding on these. We’ve evaluated the best window replacement companies in George Mason mostly based on energy efficiency, as it’s what’s best for the environment and for you as a homeowner. Energy Star certified windows can lower power bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:
Service Area
This one is self-explanatory, but we’ve chosen to highlight window installation companies that serve the George Mason area so you can find the best window installation company near you.
Work Quality
We’re certain that you’re looking for professionals who do a great job installing windows. We’ve vetted each company featured on this list to make sure its contractors are well-qualified and that the company has received plenty of positive customer feedback to vouch for its service.
Customer Reviews
Customer feedback is another super important review factor. If the majority of customers don’t have nice things to say about their experience with a certain installer, you won’t see it featured on EcoWatch.
Cost
This one is a give-and-take: as with most services, cheap window companies may not provide the highest quality service. On the other hand, we want to ensure we’re highlighting companies that provide a variety of price and financing options so they’re accessible to most homeowners.
Warranty
As discussed, windows are a significant investment, so you’ll want to be certain that investment is well protected. Window installation companies that provide lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have been in the industry for a while. 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.
George Mason, VA Window Replacement FAQs
What is the typical cost to replace windows?
The average cost of installing a window can range between $450 and $650. There are a variety of factors that influence the cost, such as local labor costs, your property’s location, the number of windows, how energy-efficient the windows are, the materials used in designing the windows and styles and sizes of windows.
What kind of window is the best for energy efficiency?
A window’s energy efficiency depends on several factors, such as the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are typically the most energy-efficient and are certified by the U.S. Department of Energy.
Can I install my own windows?
If you’re handy and know how to replace a window, you may be able to install your own windows. However, if you don’t have the time or experience, we recommend hiring a professional.
How often should you replace your windows?
Windows usually last about 20 to 30 years, but anytime you see damage on your windows, it’s a good time to have an expert take a look at them to see if they need any repairs or replacements.