20 Best Window Companies in Lanham, MD (2024 Reviews)
If you’re looking to get new windows, our guide to the best window installation companies can help.
We analyzed all the top-rated window companies in Lanham 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 home renovations or have old windows, windows play a key role in conserving electricity in your home. Traditional, outdated windows can cost you in electric bills. In fact, the Department of Energy estimates that about 30% of your house’s heat or cool air could be lost through your windows.
That’s not great for either your wallet or the environment, but one of the best window installation companies can help you with that.
Unlike other review sites, EcoWatch ranks window installation companies based on energy efficiency while also considering cost, customer satisfaction and service area.
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 Lanham
The EcoWatch Reviews team examined many window providers in Lanham to find the best ones for our readers. We assessed the installers based on their energy-efficient offerings, coverage area, price, customer service, local experience 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 offers windows expertise in Lanham. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has over 27 years of experience in the windows industry, and it currently serves 200 locations nationwide. The provider has plenty of positive reviews from customers online.
If you’re looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, this may be the provider for you.
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 make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window World cost in Lanham?Window World does not display prices on its website, but it's known for offering some of the most affordable window installations around. For more accurate information on pricing, you can receive a quote from the company.

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 offers the best availability in Lanham. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has over 27 years of experience in the windows industry, and it currently serves nearly every state except Mississippi and West Virginia. The provider has plenty of positive reviews from customers online.
If you’re looking for a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started, this may be the provider for you.
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 make sure you mention that you’d like Energy Star windows when inquiring.
How much does Renewal by Andersen cost in Lanham?Andersen does not display prices 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. For more accurate information on pricing, you can receive a quote from the company.

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 offers the best window installation for businesses in Lanham. 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 over 23 years of experience in the windows industry, and it currently serves 13 states and Washington D.C. The provider has plenty of positive reviews from customers online.
If you’re looking for a company that installs windows and doors at businesses across the Eastern U.S, this may be the provider for you.
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 make sure you mention that you’d like Energy Star windows when inquiring.
How much does Aeroseal Windows cost in Lanham?Aeroseal does not display prices on its website, but it provides high-quality windows at a competitive price point. For more accurate information on pricing, you can receive a quote from the company.

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 offers the best residential windows in Lanham. It's a company that serves hundreds of thousands of homeowners, mostly in the mid-Atlantic region of the U.S. Window Nation has over 16 years of experience in the windows industry, and it currently serves residents within 75 miles of its showrooms, which are in 13 states. The provider has plenty of positive reviews from customers online.
If you’re looking for a company that gives customers the opportunity to view products and to speak to a representative in person in its showrooms, this may be the provider for you.
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 make sure you mention that you’d like Energy Star windows when inquiring.
How much does Window Nation cost in Lanham?Window Nation does not display prices 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. For more accurate information on pricing, you can receive a quote from the company.
Please note that the companies in this section are national, meaning the quality of the service may vary depending on your local team. We have tried to stay unbiased and transparent by describing both pros and cons for every company.
More Window Companies in Lanham
Renewal by Andersen of the Capital Region
Jessup, MDGood Customer Service
Price Transparency
Free assessment
Educational Website
Services Offered
Bay Windows
Glass Doors
Double-Hung
Window Replacement/Installation
Skylights
Champion Replacement Windows of Baltimore
Rosedale, MDSunrooms
Free assessment
Good Customer Service
Single-source accountability
Price Transparency
Products made in the USA
Services Offered
Double-Hung
Bay Windows
Glass Doors
Window Replacement/Installation
Window Nation
Glen Burnie, MDPrice Transparency
Free assessment
Educational Website
Services Offered
Bay Windows
Wood Frames
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
Custom Window Designs
Triple Pane Glass
Vinyl Frames
Double-Hung
Capitol Improvements - Roofing & Siding Contractor
Bowie, MDFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Window Replacement/Installation
KELEMER BROTHERS REPLACEMENT WINDOWS
Silver Spring, MDPrice Transparency
Free assessment
Educational Website
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Anderson Glass Contractors - Frameless Shower Door, Glass Door in Alexandria VA
Marlow Heights, MDCustom glass services
Good Customer Service
Price Transparency
Free in-person consultation
Educational Website
24-hour emergency availability
Free assessment
Services Offered
Glass Showers
Glass Doors
Custom Glass
Glass Repair
Window Replacement/Installation
Mirrors
Old Town Glass & Window Repair
Alexandria, VALarge online project gallery
Affordable prices
Good Customer Service
Free assessment
Third-generation glassier
Price Transparency
Services Offered
Glass Doors
Mirrors
Glass Showers
Window Replacement/Installation
Glass Repair
Custom Glass
DISTRICT CAPITOL GLASS LLC
Alexandria, VAPrice Transparency
Educational Website
Good Customer Service
Free assessment
Services Offered
Glass Showers
Glass Doors
Screen Repair
Window Repair
Window Replacement/Installation
Mirrors
Glass Repair
American Remodel
Annapolis, MDPrice Transparency
Educational Website
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Tri County Windows and Siding
Vienna, VAFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Double-Hung
Skylights
Glass Doors
Bay Windows
Custom Window Designs
Window Replacement/Installation
Bright Side Exteriors
Centreville, VAFree assessment
Services Offered
Window Replacement/Installation
Window Repair
Glass Doors
Advanced Window & Glass Repair, LLC
Woodbridge, VAEducational Website
Good Customer Service
Price Transparency
Free assessment
Timely Service
Services Offered
Window Repair
Custom Glass
Bay Windows
Glass Repair
Glass Showers
Vinyl Frames
Energy-Efficient Options
Window Replacement/Installation
Glass Doors
Fiberglass Frames
Tempered Glass
Double-Hung
Mirrors
AC Matthews, Roofing & Exteriors
Towson, MDEducational Website
All-inclusive repair and maintenance
Free assessment
Good Customer Service
Price Transparency
High-quality materials
Energy-efficient windows
Services Offered
Window Replacement/Installation
Obrebski Brothers Windows and Doors
Nottingham, MDEducational Website
Good Customer Service
Free assessment
Family service
Lifetime guarantee
Financing options available
Services Offered
Energy-Efficient Options
Glass Doors
Window Replacement/Installation
Home Exteriors LLC.
Manassas, VAGood Customer Service
Educational Website
Timely Service
Price Transparency
Free assessment
Services Offered
Glass Doors
Window Replacement/Installation
Garrety Glass - Betterliving Sunrooms
Cockeysville, MDTimely Service
Educational Website
Good Customer Service
Free assessment
Price Transparency
Services Offered
Glass Doors
Mirrors
Custom Glass
Glass Repair
Window Replacement/Installation
Glass Showers
Bay Windows
C2 Operations
Leesburg, VAPrice Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Double-Hung
Glass Doors
Milcon Design & Build
Waterford, VAFree assessment
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Glass Doors
Bay Area Exteriors
Easton, MDGood Customer Service
Timely Service
Educational Website
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Bay Windows
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 Lanham, 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 Lanham Saves You Money
By upgrading to energy-efficient windows, you can take advantage of several benefits, such as:
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes tend to have windows that are outdated, leaky or maybe even damaged in some way. Updating your windows could help increase the value of your property if you decide to sell.
- Save money on power bills: Since energy-efficient windows reduce how much energy you need to heat or cool your home, they can help you save about $283 annually on your energy bills in Lanham.
- 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 damaging UV rays, preventing fading of your furniture, carpet and other valuables.
- Reduce your carbon footprint: Decreasing how much energy you use also lowers your carbon emissions. You could reduce it by about 249 pounds.
Estimated Cost of Window Replacement in Lanham
When considering window installation, each company provides varying services and prices. Let’s go over some typical costs and services.
How Much Do New Windows Cost?
Generally, Lanham homeowners can anticipate their window replacements to range from $250 to $1,200. The most common installations sit at around $600. How much it will cost is based on several factors, like material, the location of your home, type, size, number of windows and more.
Whether or not you opt for energy-efficient windows is another factor that will influence the cost. These will almost always cost more than other windows, but on the other hand, you can save about $283 a year on your energy bills in Lanham.
Costs will also vary based on the material of your frame. Aluminum frames cost the least. They’re sturdy, light and maintenance-free, but provide poor insulation. Vinyl frames are somewhat expensive and offer good insulation. Composite frames made with wood fibers encased in plastic also offer good insulation and are moderately expensive. Wood frames are the most expensive and are the most in-demand. They’re also aesthetically pleasing and provide decent insulation for your home.
What Services do Window Installers Offer?
Generally, there are two kinds of window replacement services companies offer: full-frame and pocket installations.
A full-frame installation replaces the full window, such as the windowsill, frame, trim and the window panes. As this type of installation requires more time and labor, it will be more expensive than a pocket installation. Pocket installations (or retrofits) entail installing a new window within its existing frame, which makes pocket installations take less time and therefore cost less. However, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.
Your window replacement company should be able to help you figure out what’s best for your needs. In Lanham, the decision will mostly be based on how old your windows are and if there’s any damage. Wood can decay if not properly maintained over the years, so it’s good to have a professional assess 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 Lanham
In our hunt to find the most reliable, eco-friendly window installers in Lanham, the EcoWatch Reviews team assessed many companies before landing on these. Along with energy efficiency, we reviewed 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 Lanham so you can find a quality 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 in our guide to ensure its technicians are well-qualified and that the company has received plenty of positive customer feedback to vouch for its service.
Customer Reviews
Another self-explanatory yet very important review factor is customer feedback. If most customers don’t have good things to say about their service from a certain company, you won’t see it featured on EcoWatch.
Cost
This one is a give-and-take: as with most services, cheap window installation companies are not going to provide the highest quality service. On the other hand, we want to make sure we’re highlighting companies that offer a wide range of price and financing options so they’re accessible to most homeowners.
Warranty
Protecting your investment in new windows is important. For that reason, window installation companies that provide lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Because of Lanham’s climate, homeowners will want to mitigate low efficiency, water damage and rot. We factored in local experience to reflect the ability of Lanham window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Lanham, MD Window Replacement FAQs
How much should window installation cost?
The average cost to replace a window can range between $450 and $650. There are many factors that influence how much it costs, including your property’s location, styles and sizes of windows, the materials used in designing the windows, the number of windows, how energy-efficient the windows are and local labor costs.
Which kind of window is the best?
Generally, double-pane windows are more efficient than single-pane windows and windows that don’t open are more efficient than windows that do. If you want to be sure you’ll get the most energy-efficient windows, look for models that have the blue Energy Star certification — they’re certified energy-efficient by the U.S. Department of Energy.
Can I replace 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. However, if you don’t have the time or skills, we recommend hiring a professional.
How often do you need to replace your windows?
Windows have a typical lifespan of about 20 to 30 years. If your windows are older than that, they probably need to be replaced. Apart from that, if your windows have any damage on them, or they have become difficult to operate, they may be in need of replacement.