20 Best Window Companies in Germantown, MD (2025 Reviews)

Are you looking to replace 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 Germantown 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 January 24, 2025

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.

Whether you're doing renovations or have windows that need repairs, windows play a crucial role in conserving your home's electricity. Drafty windows could lead to having higher electric 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 Germantown, 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 $294 per year.

Advertisement

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Best Energy-Efficient Features

Champion

★★★★★
4.5
  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty
Save 35% + $100 off per window!
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best Window Installation & Replacement Companies in Germantown

The EcoWatch Reviews team researched several installers in Germantown to find the best ones for our readers. The installers we’ve included in this article scored best in our categories: energy-efficient offerings, price, availability, customer service and more.

Window World logo
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 Germantown. Window World has been in the window installation business for around 27 years. The provider has a lot of glowing reviews from customers online.

You may want to consider picking Window World if you're looking for a installer that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.

Energy Efficiency of Window World Windows

There are a wide variety of window types that Window World offers, some of which are Energy Star products. 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 Germantown?

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. Getting a free quote on its website is the best way to know for sure.

Renewal by Andersen logo
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 has the best availability in Germantown. Andersen has been in the window installation business for around 27 years. The provider has a lot of glowing reviews from customers online.

You may want to consider picking 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 Windows

There 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 Germantown?

Andersen doesn’t have any prices available on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. Getting a free quote on its website is the best way to know for sure.

Aeroseal Windows logo
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 has the best window installation for businesses in Germantown. Aeroseal has been in the window installation business for around 23 years. The provider has a lot of glowing reviews from customers online.

You may want to consider picking 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 Windows

There are a wide variety of window types that Aeroseal Windows offers, 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 Germantown?

Aeroseal doesn’t have any prices available on its website, but it provides high-quality windows at a competitive price point. Getting a free quote on its website is the best way to know for sure.

Window Nation logo
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 has the best residential windows in Germantown. Window Nation has been in the window installation business for around 16 years. The provider has a lot of glowing reviews from customers online.

You may want to consider picking 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 Windows

There are a wide variety of window types that Window Nation offers, some of which are Energy Star products. 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 Germantown?

Window Nation doesn’t have any prices 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. Getting a free quote on its website is the best way to know for sure.

One thing to note is that the following companies are national, which means the quality of the service may vary depending on your local team. We have tried to be unbiased and transparent by listing pros and cons for every provider.

More Window Companies in Germantown

Renewal by Andersen of the Capital Region

North Bethesda, MD
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Bay Windows
  • Service icon Skylights
  • Service icon Double-Hung

Website: https://www.renewalbyandersen.com/window-company/085-capital-region/about-us
Address: 5081 Nicholson Ln, North Bethesda, MD 20852
Phone: (301) 816-3221

Champion Replacement Windows of Baltimore

Rosedale, MD
3.2
★★★★★
  • Pros icon Single-source accountability
  • Pros icon Free assessment
  • Pros icon Sunrooms
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Products made in the USA

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Bay Windows

Website: https://www.championwindow.com/Baltimore/
Address: 23 Fontana Ln, Rosedale, MD 21237
Phone: (410) 202-8636

Window Nation

Glen Burnie, MD
4.7
★★★★★
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Price Transparency

Services Offered

  • Service icon Triple Pane Glass
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Bay Windows
  • Service icon Wood Frames
  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Double-Hung
  • Service icon Vinyl Frames

Website: https://www.windownation.com/baltimore-showroom/
Address: 871 Cromwell Park Dr, Glen Burnie, MD 21061
Phone: (410) 766-8488

C2 Operations

Leesburg, VA
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation

Website: https://c2operations.com/
Address: 18 Sycolin Rd SE, Leesburg, VA 20175
Phone: (703) 651-6677

KELEMER BROTHERS REPLACEMENT WINDOWS

Silver Spring, MD
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options

Website: http://www.kelemerbrothers.com/
Address: 10822 Childs Ct, Silver Spring, MD 20901
Phone: (410) 299-0038

Milcon Design & Build

Waterford, VA
5.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: http://milcondesignandbuild.com/
Address: 40413 Stonebrook Hamlet Pl, Waterford, VA 20197
Phone: (703) 581-2761

Tri County Windows and Siding

Vienna, VA
5.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Custom Window Designs
  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Skylights
  • Service icon Bay Windows

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

Bright Side Exteriors

Centreville, VA
5.0
★★★★★
  • Pros icon Free assessment

Services Offered

  • Service icon Window Repair
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: https://brightsidevirginia.com/
Address: 13953 Big Yankee Ln, Centreville, VA 20121
Phone: (703) 213-7461

DISTRICT CAPITOL GLASS LLC

Alexandria, VA
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Glass Repair
  • Service icon Window Repair
  • Service icon Screen Repair
  • Service icon Glass Doors
  • Service icon Glass Showers
  • Service icon Window Replacement/Installation
  • Service icon Mirrors

Website: https://districtcapitolglass.com/
Address: 205 Yoakum Pkwy #1119, Alexandria, VA 22304
Phone: (571) 344-4416

Old Town Glass & Window Repair

Alexandria, VA
5.0
★★★★★
  • Pros icon Affordable prices
  • Pros icon Free assessment
  • Pros icon Third-generation glassier
  • Pros icon Large online project gallery
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Custom Glass
  • Service icon Mirrors
  • Service icon Glass Showers
  • Service icon Glass Repair

Website: http://www.oldtownglassandmirror.com/
Address: 244 S Reynolds St, Alexandria, VA 22304
Phone: (703) 609-3508

Capitol Improvements - Roofing & Siding Contractor

Bowie, MD
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation

Website: https://improveitmd.com/
Address: 12606 Hillmeade Station Dr, Bowie, MD 20720
Phone: (301) 690-8187

Anderson Glass Contractors - Frameless Shower Door, Glass Door in Alexandria VA

Marlow Heights, MD
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Custom glass services
  • Pros icon Good Customer Service
  • Pros icon Free in-person consultation
  • Pros icon 24-hour emergency availability
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Glass Showers
  • Service icon Mirrors
  • Service icon Glass Repair
  • Service icon Custom Glass
  • Service icon Window Replacement/Installation

Website: https://precisionglassexperts.com/
Address: 4570 Beech Rd, Marlow Heights, MD 20748
Phone: (703) 623-2223

Home Exteriors LLC.

Manassas, VA
5.0
★★★★★
  • 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 Glass Doors
  • Service icon Window Replacement/Installation

Website: http://www.homexteriorsllc.com/
Address: 8702 Jackson Ave, Manassas, VA 20110
Phone: (703) 349-2213

Advanced Window & Glass Repair, LLC

Woodbridge, VA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Doors
  • Service icon Custom Glass
  • Service icon Fiberglass Frames
  • Service icon Tempered Glass
  • Service icon Glass Showers
  • Service icon Window Replacement/Installation
  • Service icon Glass Repair
  • Service icon Energy-Efficient Options
  • Service icon Window Repair
  • Service icon Bay Windows
  • Service icon Vinyl Frames
  • Service icon Double-Hung
  • Service icon Mirrors

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

Garrety Glass - Betterliving Sunrooms

Cockeysville, MD
5.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Timely Service
  • Pros icon Good Customer Service

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Custom Glass
  • Service icon Glass Repair
  • Service icon Mirrors
  • Service icon Bay Windows
  • Service icon Glass Showers

Website: https://garretyglass.com/
Address: 11309 York Rd, Cockeysville, MD 21030
Phone: (443) 873-0700

AC Matthews, Roofing & Exteriors

Towson, MD
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon High-quality materials
  • Pros icon Energy-efficient windows
  • Pros icon All-inclusive repair and maintenance
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation

Website: https://acmatthews.com/towson/
Address: 120 Beech View Ct, Towson, MD 21286
Phone: (410) 324-2210

American Remodel

Annapolis, MD
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation

Website: https://american-remodel.com/
Address: 1125 West St Suite 518, Annapolis, MD 21401
Phone: (301) 591-6376

Replacement Windows and Doors-Homerite Waynesboro

Waynesboro, PA
5.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Price Transparency
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options
  • Service icon Glass Repair
  • Service icon Glass Doors

Website: http://www.homeritewaynesboro.com/
Address: 700 S. Potomac St *SHOWROOM 12-4. CALL ANYTIME*, Waynesboro, PA 17268
Phone: (717) 749-4874

Obrebski Brothers Windows and Doors

Nottingham, MD
5.0
★★★★★
  • Pros icon Family service
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Financing options available
  • Pros icon Good Customer Service
  • Pros icon Lifetime guarantee

Services Offered

  • Service icon Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation

Website: http://obrebskibrothers.com/
Address: 10001 Franklin Square Dr # H, Nottingham, MD 21236
Phone: (410) 497-9267

Potomac Windows & Doors

Fredericksburg, VA
5.0
★★★★★
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation

Website: http://www.potomacwindows.com/
Address: 15 Cascade Ln, Fredericksburg, VA 22406
Phone: (703) 963-6296
Germantown Window Cost Calculator

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

By upgrading to energy-efficient windows, you and your family can benefit in several ways, such as:

  • Save on power bills: Because energy-efficient windows lower the amount of energy used to heat or cool your home, the switch can help you save around $294 annually on your energy bills in Germantown.
  • Protect your investment: When you have an older home, your windows could also be outdated or leaky. Upgrading and repairing your windows is an important part of maintaining your property and its value.
  • 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 because of their ability to filter out damaging UV rays.
  • Reduce your carbon footprint: Reducing how much energy you use also lowers your carbon emissions. You could reduce it by 234 pounds per year on average.

Estimated Cost of Window Replacement in Germantown

Windows come in various shapes, styles and purposes, so costs and services will vary considerably based on several factors. Below, we go over the typical cost and services that you’ll find from window installers.

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. Costs will vary significantly based on the quality of your products, your location, the current condition of your home and the number of windows you need. Many window companies also offer door installations and other add-ons like coating, baths, shutters and more. These extra services will increase overall project costs.

Whether or not you choose energy-efficient windows is another factor that will determine the cost. These will typically cost more than other windows, but on the other hand, you can save about $294 a year on your energy bills in Germantown.

Something else that influences the overall cost is the material of the frame you choose. Aluminum frames are generally the least pricey 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 provide decent insulation. Fiberglass and vinyl frames provide good insulation as well and cost somewhere between the other two.

What Services do Window Installers Offer?

Generally, there are two types of window installation services companies provide: full-frame and pocket installations.

Full-frame installations are necessary when you want to change the style of your windows or your window has a lot of rot or deterioration. With this service, your professionals will replace the whole window, including the trim, sill and frame. Pocket installations (also known as retrofits) are when you replace a window while leaving the old frame. Pocket installations are on the simpler end and won’t cost as much, but you can’t do this kind of installment if you have any pre-existing rot or water damage.

Your window installation company should be able to help you decide what’s best for your needs. In Germantown, 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 a good idea to have a professional examine your frames and window sills.

Advertisement

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great Industry Reputation
  • Award-winning Company
  • Member of US Green Building Council
  • Manufactures products in-house
Save $375 Off Each Window
Get Estimate

Best Energy-Efficient Features

Champion

★★★★★
4.5
  • Many years of experience
  • Low prices relative to competitors
  • Limetime warranty
Save 35% + $100 off per window!
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

How We Choose the Best Window Installers in Germantown

In our hunt to find the most reliable, eco-friendly window installers in Germantown, EcoWatch chose the above companies as the best window installation companies in the city. Along with energy efficiency, we assessed each installer and assigned rankings based on the following methodology:

Service Area

This one is self-explanatory, but we’ve chosen to highlight window installers that serve Germantown so you can find the best window installation company near you.

Work Quality

We’re willing to bet that you’re not looking for a company to do a shoddy job installing windows. We’ve vetted each company featured in our guide to ensure its technicians are well-qualified and that the company has gotten 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 service from 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 installers are not going to 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

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

Years of Experience

Lastly, we like to see companies that have been in the industry for quite some time. Window installation companies that have more experience earn higher rankings by our standards. We like to see at least ten years of experience.

Germantown, MD Window Replacement FAQs

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

The average cost to install a window ranges between $450 and $650. There are a variety of factors that affect how much it costs, such as your property’s location, local labor costs, the number of windows, styles and sizes of windows, the materials used in designing the windows and how energy-efficient the windows are.

What are the most common kinds of replacement windows?

There are several different kinds of windows you can get for your home, such as slider windows, awning windows, picture windows, casement windows, double-hung and single-hung windows, bay windows and transom windows.

Can you install your 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 skills, we don’t recommend it.

When is the best time of year to replace windows?

While you can install windows any time of year, warmer weather is often better for installing replacement windows. Additionally, it shouldn’t be raining, because rain can make the installation harder.

Should I replace all my windows at once?

If you want to get more efficient windows and save money on energy costs, replacing all your windows together is the only way to see a noticeable difference. However, if you have only one or two windows that are broken or drafty, you can replace just those.