Upgrade Your Home — Know Your Window Installation Cost Up Front

Transparent, competitive pricing on premium window installation — no surprises..

Premium materials + expert installation
Clear cost breakdowns — so you know exactly what you’re paying for
Energy-efficient windows that can reduce energy bills and increase home value

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What Impacts Window Installation Cost

Here are the main factors that influence how much you’ll pay for new windows:

Window Type & Style - Basic double-hung or sliding windows cost less than complex custom shapes, bay/bow windows, or large picture windows.
Frame Material - Vinyl tends to be the most budget-friendly and energy efficient, while wood, fiberglass, or composite frames deliver increased durability and aesthetics, often at a higher cost.
Glass & Energy Efficiency Options - Double- or triple-pane windows, Low-E coatings, argon gas fills, and other energy-saving upgrades will raise the upfront cost — but can pay off over time with lower energy bills.
Size & Number of Windows - Replacing many windows may provide a volume discount and result in a lower per window cost.
Quality Install - Experienced, certified installers may cost more initially, but are well worth the investment when it comes to longevity of the window and warranty coverage.

A Reputation Built on Excellence

Why Choose Us — Quality and Value

Over 20 years serving Northern Virginia and Maryland — trusted by hundreds of homeowners
Custom quotes tailored to your needs and budget
Energy-efficient products that lower your energy bills
Full transparency — no hidden fees or surprises after installation
Premium craftsmanship, backed by lifetime warranties and hundreds of 5-star reviews

Highest rated contractor in the DMV with over 600 5-star reviews!

What Our Customers Have to Say…

Joon and his crew did a great job installing a sliding door. We’ve had two projects done by WoW and have been very happy with their work both times.

Aaron H

Window Replacement Bethesda, MD

They kept in touch with us every step of the process, we never felt like we had been forgotten. The windows came in sooner they they had quoted, and they worked with our tight schedules to get the install scheduled at a time that worked for us.

Angela M.

Window Replacement VA

Everyone at WoW went above and beyond, and exceeded my already high expectations. Our house is now warmer, quieter, and looks so much better!

Anne D.

Window Replacement Centreville, VA

Young and his team did a great job of installing 31 windows and 2 doors in less than 2 days. They were very careful and thorough. We hope this will lower our sky high electric bills!

Anne F

Window Replacement Hollywood, MD

Simply put, it was one of the best contracting / house project experiences we’ve had.

Trey P.

Window Replacement Vienna, VA

For starters and for those who aren’t aware of Eric, he is the owner of WoW and is one of the key contributors for the replacement window forum, the largest forum in the US for contractors and consumers to discuss window needs.

Jason C.

Window Replacement Herndon, VA

We’ll go back to them for all of our future window and door needs, no question.

Russ M.

Window Replacement Reston, VA

Greg was knowledgeable and easy to work with. Installation and cleanup went smoothly, and the windows look great! This is a top-notch company, from sales, to backend office and production, so kudos to the owner for running a tight ship.

Spiro S.

Window Replacement Warrenton, VA

“What they are is a place to get a reasonable price with outstanding quality and excellent customer service. ”

Lawerence Stern

Window Replacement VA

The installation process was very smooth, and the crew was professional and efficient. Overall, it was a very positive experience working with Windows on Washington, and I wish we had proceeded with the project in 2018 when we initially planned to do so.

Yan Chen

Window Replacement Fairfax, VA

Ready to transform YOUR home and save on energy costs?

We Feature Premium Okna Window Products

OKNA Starmark Evo 7500

OKNA Starmark Evo 7500 Casement Windows offer beauty and functionality. The superior design makes it ideal for not only single windows but also for multiple assemblies such as bows, bays, and picture windows, as well as your own original combinations. A beveled screen frame offers the appearance of wood molding for added beauty.

OKNA Enviro-Star 800

The OKNA Enviro-Star 800 is Okna’s premier replacement window. The Enviro-Star combines superb craftsmanship with an Old World look and feel. This series offers myriad glass and structural options to seamlessly blend with any décor, while providing the utmost in energy efficiency. Since all OKNA products are custom-made, you can be sure of a perfect fit every time.

OKNA Insul-Tec 500

The OKNA Insul-Tec 500 combines excellent craftsmanship with a traditional look and feel. This series offers all the benefits you have come to expect from vinyl windows, with a variety of options to make your home energy-efficient and enhance its beauty. Since all OKNA Windows products are custom-made, you can be sure of a perfect fit, which translates to savings on time and labor during installation.