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
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Why you can trust EcoWatch
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.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Best Energy-Efficient Features
Champion
- Many years of experience
- Low prices relative to competitors
- Limetime warranty
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
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
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 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 WindowsThere 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
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 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 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 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
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 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 WindowsThere 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
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 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 WindowsThere 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, MDPrice Transparency
Educational Website
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Bay Windows
Skylights
Double-Hung
Champion Replacement Windows of Baltimore
Rosedale, MDSingle-source accountability
Free assessment
Sunrooms
Price Transparency
Good Customer Service
Products made in the USA
Services Offered
Window Replacement/Installation
Double-Hung
Glass Doors
Bay Windows
Window Nation
Glen Burnie, MDFree assessment
Educational Website
Price Transparency
Services Offered
Triple Pane Glass
Window Replacement/Installation
Glass Doors
Bay Windows
Wood Frames
Energy-Efficient Options
Custom Window Designs
Double-Hung
Vinyl Frames
C2 Operations
Leesburg, VAEducational Website
Free assessment
Price Transparency
Services Offered
Glass Doors
Double-Hung
Window Replacement/Installation
KELEMER BROTHERS REPLACEMENT WINDOWS
Silver Spring, MDFree assessment
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Milcon Design & Build
Waterford, VAPrice Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Glass Doors
Tri County Windows and Siding
Vienna, VAPrice Transparency
Good Customer Service
Free assessment
Educational Website
Services Offered
Custom Window Designs
Glass Doors
Double-Hung
Window Replacement/Installation
Skylights
Bay Windows
Bright Side Exteriors
Centreville, VAFree assessment
Services Offered
Window Repair
Glass Doors
Window Replacement/Installation
DISTRICT CAPITOL GLASS LLC
Alexandria, VAEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Glass Repair
Window Repair
Screen Repair
Glass Doors
Glass Showers
Window Replacement/Installation
Mirrors
Old Town Glass & Window Repair
Alexandria, VAAffordable prices
Free assessment
Third-generation glassier
Large online project gallery
Price Transparency
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Custom Glass
Mirrors
Glass Showers
Glass Repair
Capitol Improvements - Roofing & Siding Contractor
Bowie, MDFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Anderson Glass Contractors - Frameless Shower Door, Glass Door in Alexandria VA
Marlow Heights, MDEducational Website
Free assessment
Custom glass services
Good Customer Service
Free in-person consultation
24-hour emergency availability
Price Transparency
Services Offered
Glass Doors
Glass Showers
Mirrors
Glass Repair
Custom Glass
Window Replacement/Installation
Home Exteriors LLC.
Manassas, VAGood Customer Service
Timely Service
Price Transparency
Free assessment
Educational Website
Services Offered
Glass Doors
Window Replacement/Installation
Advanced Window & Glass Repair, LLC
Woodbridge, VAFree assessment
Price Transparency
Timely Service
Educational Website
Good Customer Service
Services Offered
Glass Doors
Custom Glass
Fiberglass Frames
Tempered Glass
Glass Showers
Window Replacement/Installation
Glass Repair
Energy-Efficient Options
Window Repair
Bay Windows
Vinyl Frames
Double-Hung
Mirrors
Garrety Glass - Betterliving Sunrooms
Cockeysville, MDPrice Transparency
Educational Website
Free assessment
Timely Service
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Custom Glass
Glass Repair
Mirrors
Bay Windows
Glass Showers
AC Matthews, Roofing & Exteriors
Towson, MDEducational Website
Free assessment
Good Customer Service
High-quality materials
Energy-efficient windows
All-inclusive repair and maintenance
Price Transparency
Services Offered
Window Replacement/Installation
American Remodel
Annapolis, MDFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Replacement Windows and Doors-Homerite Waynesboro
Waynesboro, PAGood Customer Service
Educational Website
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Glass Repair
Glass Doors
Obrebski Brothers Windows and Doors
Nottingham, MDFamily service
Educational Website
Free assessment
Financing options available
Good Customer Service
Lifetime guarantee
Services Offered
Glass Doors
Energy-Efficient Options
Window Replacement/Installation
Potomac Windows & Doors
Fredericksburg, VAPrice Transparency
Services Offered
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Germantown, 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 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.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Best Energy-Efficient Features
Champion
- Many years of experience
- Low prices relative to competitors
- Limetime warranty
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
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.