20 Best Window Companies in Frederick, MD (2023 Reviews)
If you're thinking of upgrading to new windows, our list of the top window installation companies can help.
We analyzed all the top-rated window companies in Frederick and selected the best 20 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
Why you can trust EcoWatch
Whether you're updating for aesthetics or have damaged windows, windows play a important role in conserving energy in your home. Drafty or leaky windows can decrease your home's energy efficiency by up to 30%, according to the Department of Energy. In Frederick, that's an average of $294 per year that you could save on your power bills by making the switch.
That's also bad news for the environment because the extra energy required by old windows increases your carbon footprint.
So if you're building a new home, renovating or changing out old windows in Frederick, you've found the best place to get started.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in Frederick
The EcoWatch team assessed dozens of window providers across Frederick to narrow our list down to the top ones. The installers we've included in this article scored best in our categories, which include energy-efficient offerings, availability, price, customer service and more.

Window World
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EnergyStar Partner
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Large serice area
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Low prices relative to competitors
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Great industry reputation
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Lifetime warranty
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Quality of service will depend on your area
Window World has windows expertise in Frederick. Window World has around 27 years of industry experience, and it currently serves 200 locations nationwide. Hundreds of positive reviews on customer review websites back the company's reputation.
You may want to consider going with Window World if you're interested in a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsWindow World carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for high-quality 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 Frederick?Window World doesn’t have any pricing information available on its 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.

Renewal by Andersen
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Great industry reputation
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Award-winning company
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Member of US Green Building Council
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Manufactures products in-house
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No lifetime warranty
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More expensive than competition
Renewal by Andersen provides the best availability in Frederick. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has 27 years of experience in the windows industry, and it has established itself as one of the most respected companies in the business.
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 WindowsThere are a wide variety of window types that Renewal by Andersen offers, some of which are Energy Star products. 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 Frederick?Prices are not available on Andersen’s website because the cost of window replacement varies greatly depending 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. You can request a free quote on its website for more information about pricing.

Aeroseal Windows
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Many years of experience
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Great industry reputation
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Low number of customer complaints
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Manufactures products in-house
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Custom Designs
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No lifetime warranty
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Not ideal for residential installations
Aeroseal Windows offers the best window installation for businesses in Frederick. 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 around 23 years of experience in the windows industry, and it currently serves 13 states and Washington D.C. Its reputation is backed by hundreds of positive reviews from customers online.
Aeroseal may be the company for you if you're interested in one that installs windows and doors at businesses across the Eastern U.S.
Energy Efficiency of Aeroseal Windows WindowsAeroseal Windows’s commitment to sustainability can be seen in its energy-efficient window offerings. 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 Frederick?Aeroseal doesn’t have any pricing information listed on its website, but it provides high-quality windows at a competitive price point. The best way to get more accurate information is to get a free quote from the company.

Window Nation
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Award-winning company
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Manufactures products in-house
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Custom designs
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Wide variety of products and services
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Installation not covered by warranty
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Limited service area
Window Nation has the best residential windows in Frederick. Window Nation has around 16 years of industry experience, and it currently serves residents within 75 miles of its showrooms, which are in 13 states. Hundreds of positive reviews on customer review websites back the company's reputation.
You may want to consider going with Window Nation if you're interested in a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms.
Energy Efficiency of Window Nation WindowsWindow Nation carries some Energy Star windows, but note that not all its windows are energy-efficient, so make sure you ask for high-quality Energy Star windows when inquiring. Each 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.
How much does Window Nation cost in Frederick?Window Nation doesn’t have any pricing information available on its website, but 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. Receiving a free quote on its website is the best way to know for sure.
We aim to stay unbiased and transparent by describing pros and cons for each company we review. Additionally, our rankings are not influenced by any partnerships.
More Window Companies in Frederick
Renewal by Andersen of Capital Region - Sterling
Sterling, VA-
Good Customer Service
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Educational Website
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Free assessment
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Price Transparency
Services Offered
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Glass Showers
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Double-Hung
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Custom Window Designs
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Window Replacement
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Residential Windows
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Sliding Glass
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Commercial Windows
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Stained Glass
Window World of Frederick County
Frederick, MD-
Educational Website
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Price Transparency
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Free assessment
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Good Customer Service
Services Offered
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Window Replacement
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Residential Windows
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Fast Delivery
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Sliding Glass
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Energy-Efficient Options
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Custom Window Designs
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Bay Windows
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Double-Hung
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Commercial Windows
Champion Replacement Windows of Baltimore
Rosedale, MD-
Free assessment
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Good Customer Service
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Price Transparency
Services Offered
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Sliding Glass
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Custom Window Designs
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Bay Windows
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Window Replacement
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Double-Hung
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Residential Windows
Window Nation
Glen Burnie, MD-
Educational Website
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Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Sliding Glass
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Residential Windows
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Stained Glass
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Custom Window Designs
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Bay Windows
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Window Replacement
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Double-Hung
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Energy-Efficient Options
Glass & Mirror Services, Inc.
Frederick, MD-
Good Customer Service
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Free assessment
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Price Transparency
Services Offered
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Double-Hung
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Glass Showers
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Residential Windows
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Aluminum Window Frames
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Custom Window Designs
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Stained Glass
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Window Replacement
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Commercial Windows
R&H Glazing Inc
Frederick, MD-
Price Transparency
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Educational Website
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Free assessment
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Good Customer Service
Services Offered
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Custom Window Designs
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Aluminum Window Frames
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Window Replacement
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Bay Windows
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Residential Windows
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Sliding Glass
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Commercial Windows
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Window Repair
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Double-Hung
C3 American Exteriors
Mt Airy, MD-
Free assessment
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Price Transparency
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Good Customer Service
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Educational Website
Services Offered
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Stained Glass
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Fast Delivery
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Residential Windows
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Window Replacement
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Custom Window Designs
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Aluminum Window Frames
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Commercial Windows
Affordable Glass Inc
Thurmont, MD-
Price Transparency
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Good Customer Service
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Free assessment
Services Offered
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Custom Window Designs
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Residential Windows
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Commercial Windows
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Glass Showers
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Window Repair
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Window Replacement
Window Expert
Germantown, MD-
Good Customer Service
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Educational Website
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Free assessment
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Price Transparency
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Timely Service
Services Offered
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Window Replacement
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Double-Hung
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Sliding Glass
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Window Repair
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Custom Window Designs
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Residential Windows
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Energy-Efficient Options
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Fast Delivery
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Commercial Windows
Classic Exteriors
Sykesville, MD-
Educational Website
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Price Transparency
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Free assessment
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Good Customer Service
Services Offered
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Residential Windows
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Custom Window Designs
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Commercial Windows
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Aluminum Window Frames
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Window Replacement
Pella Windows & Doors of Gaithersburg
Gaithersburg, MD-
Good Customer Service
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Educational Website
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Price Transparency
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Free assessment
Services Offered
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Full-Service Installations
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Window Replacement
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Double-Hung
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Custom Window Designs
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Residential Windows
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Bay Windows
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Sliding Glass
Potomac View Energy
Sykesville, MD-
Timely Service
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Price Transparency
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Educational Website
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Good Customer Service
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Free assessment
Services Offered
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Commercial Windows
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Double-Hung
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Bay Windows
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Sliding Glass
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Stained Glass
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Energy-Efficient Options
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Residential Windows
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Custom Window Designs
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Window Replacement
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Glass Showers
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Fast Delivery
C2 Operations
Leesburg, VA-
Free assessment
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Good Customer Service
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Price Transparency
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Educational Website
Services Offered
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Double-Hung
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Custom Window Designs
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Sliding Glass
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Window Replacement
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Residential Windows
Capital Remodeling, Inc.
Gaithersburg, MD-
Good Customer Service
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Price Transparency
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Free assessment
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Educational Website
Services Offered
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Window Replacement
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Residential Windows
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Custom Window Designs
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Glass Showers
B.T. Window & Doors LLC
Sykesville, MD-
Educational Website
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Free assessment
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Good Customer Service
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Price Transparency
Services Offered
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Window Replacement
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Custom Window Designs
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Energy-Efficient Options
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Sliding Glass
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Residential Windows
Replacement Windows and Doors-Homerite Waynesboro
Waynesboro, PA-
Free assessment
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Good Customer Service
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Timely Service
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Price Transparency
Services Offered
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Energy-Efficient Options
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Fast Delivery
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Residential Windows
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Sliding Glass
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Commercial Windows
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Stained Glass
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Custom Window Designs
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Window Replacement
Seipp Roofing, LLC
Westminster, MD-
Price Transparency
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Timely Service
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Window Replacement
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Residential Windows
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Custom Window Designs
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Commercial Windows
Rockville Window & Door Co
MD, MD-
Price Transparency
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Free assessment
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Educational Website
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Good Customer Service
Services Offered
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Residential Windows
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Aluminum Window Frames
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Custom Window Designs
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Window Replacement
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Sliding Glass
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Bay Windows
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Commercial Windows
Shiner Exteriors
Sterling, VA-
Price Transparency
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Free assessment
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Good Customer Service
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Educational Website
Services Offered
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Fast Delivery
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Bay Windows
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Residential Windows
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Commercial Windows
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Window Replacement
Windows On Washington Ltd
Sterling, VA-
Timely Service
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Energy-Efficient Options
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Bay Windows
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Residential Windows
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Window Replacement
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Commercial Windows
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Custom Window Designs
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Double-Hung
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Sliding Glass
Calculate how much you can expect to pay for window installation and replacement in Frederick, MD 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 Frederick Saves You Money
Upgrading to energy-efficient windows can help improve the comfort of your home and help you save on energy bills. Here are more details about how upgrading your windows could help you:
- Protect your investment: Upgrading your windows is an important part of maintaining your property and its real estate value, especially if your home is on the older side.
- Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out harmful UV rays, preventing fading of your furniture, carpet and other valuables.
- Save on electricity bills: After you switch to energy-efficient windows, you can see a reduction in your bills by about 12% because you'll need less energy to heat or cool your home.
- More efficient energy usage in your household: Because the winters can get very cold in Frederick, homeowners often rely on their heater during that time. Energy-efficient windows lower the amount of heat that is lost through your windows, which makes it easier to keep your house warm.
Estimated Cost of Window Replacement in Frederick
Each window replacement company offers varying services and has varying price points depending on a few factors.
How Much Do New Windows Cost?
The typical cost to install a single window is about $600 but can range from $200 to $1,200. But costs differ 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 offer door installations, which will add extra costs to your project.
It's important to keep in mind that windows with higher efficiency may cost more upfront but can save you hundreds of dollars via returns on your energy bills. Investing in certified energy-efficient windows can save Frederick homeowners $294+ a year when replacing single-pane windows.
Something else that influences the overall cost is the material you pick for your frame. Aluminum frames are typically the least expensive and are sturdy and relatively maintenance-free, but they offer poor insulation. On the other hand, wood frames are the most expensive, as they are aesthetically pleasing and offer decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.
What Services do Window Installers Offer?
The first step when considering a window installation is to figure out whether you need a full-frame or pocket installation.
A full-frame installation is a replacement of the full window. It involves taking out the old window, the sill, and the exterior and interior trim. It also involves other materials, including insulation and drip edges, which raise the total cost of the project. It's also worth noting that it's not uncommon for homeowners to have to touch up the paint surrounding the window after a full-frame installation. Pocket installations (also known as retrofits) are when you replace a window within its existing frame. Pocket installations are on the simpler end and won't carry as large a bill, but you can't do this type of installment if you have any pre-existing rot or water damage.
Your window installation company will be able to help you choose what's best for your needs. In Frederick, the decision will mostly be based on the age of your home and if there's any damage. Wood can decay if not maintained properly over the years, so it's good to have a professional examine your frames and window sills.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in Frederick
In our hunt to find the most reliable, eco-friendly window installers in Frederick, the EcoWatch Reviews team examined many companies before settling on these. Along with energy efficiency, we analyzed window companies all across the state and ranked them using the following methodology:
Service Area
Because this is a guide for Frederick, we gave more points to companies that serve the city. There are certainly other reputable providers that didn't make our list because of the low odds that they would serve the average homeowner in Frederick.
Work Quality
When selecting new windows, the quality and range of services often plays just as important of a role in insulation and performance as the brand of window you opt for. We do rate window installers higher if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
Customer feedback is another very important review factor. If the majority of customers don't have nice things to say about their service from a certain installer, it won't be featured on EcoWatch.
Cost
Cheaper windows certainly don't mean better windows, but we know many of our readers want 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
Protecting your investment in new windows is important to many homeowners. That's why window installation companies that give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Frederick's climate, homeowners will want to mitigate water damage, rot and low efficiency. We factored in local experience to reflect the ability of Frederick window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Frederick, MD Window Replacement FAQs
How much does a window install cost?
The typical cost of replacing one window ranges from $450 to $650. There are many factors that influence how much it costs, such as the number of windows, your property's location, local labor costs, how energy-efficient the windows are, styles and sizes of windows and the materials used in designing the windows.
What are the most common types of replacement windows?
There are various types of windows you can get for your house, including casement windows, slider windows, transom windows, picture windows, awning windows, double-hung and single-hung windows and bay windows.
Can I install my own windows?
If you're handy and have the time and patience to do the job right, it's possible to install your own windows. But if you don't have the time or experience, we don't recommend trying it.
How long does it usually take to install windows?
Because a window takes about 30 minutes to install, about 16 windows can be installed during an 8-hour work day.