Replacement Windows

Upgrade your home with high-quality, energy-efficient replacement windows that enhance comfort and curb appeal. Designed for durability and style, our windows provide long-lasting performance and savings.

Energy-Efficient And Stunning Double-Pane Northern VA And MD Replacement Windows

Curb-Appeal. Robust Security. Durability For Decades.

Shopping for your Maryland or Northern VA home’s replacement windows doesn’t have to be complicated. In fact, it can be downright simple. We know that might be shocking to hear because when you think of ‘window replacement’, you think of tough decisions, costly installation, and disruptive construction.

Let’s not forget the pitfalls of downright dodgy replacement window contractors with their high-pressure window replacement sales tactics. Tactics like convincing you to opt for triple-pane windows when double-pane windows are – and will always be – the perfect choice for the Northern VA climate.

We, however, will tell you exactly what you need because integrity is ingrained in the fabric of who we are. With our guidance, you’ll know exactly what your home requires. Our window replacement is absolutely hassle-free and, dare we say, an enjoyable process.

And the best part? We don’t play pricing games, and we can replace your windows for up to 30% LOWER prices than national window companies.

Our Replacement Window Services For Northern Virginia & Maryland

All great Northern VA and MD exterior contractors start with great materials – because, without exceptional products, there cannot be exceptional service.

AT Milcon Design & Build, we don’t install just any windows on your home. We ONLY offer cutting-edge, ultra-efficient windows for our specific climate. What are some of the benefits of our unsurpassed windows that make them a perfect fit for your home? Well… take your pick.

Superb Energy Efficiency – Feel at ease with your power expenses. Our windows offer superior energy efficiency through the dual benefits of our Warm Edge Super Spacer and High-Performance AGC Low-E glass.
Ultra-Efficient Glass/Super Spacer Technology: High-tech double-pane glass is coated in a special low-e glazed and infused with insulating argon gas.
Fusion-Welded Frame: The corners of the frame are fusion-welded… NOT screwed together. This creates ONE cohesive piece to eliminate corner gaps (a.k.a. air-penetration points).
100% Virgin Vinyl: Our windows are crafted from pure first-generation vinyl. This provides you with the strongest, most durable frame possible.
Superior Weatherstripping: A heavy-duty weatherstrip design provides maximum resistance to air and water infiltration.
Don’t Forget The Foam: An optional insulating foam can be inserted inside your windows’ frames to deliver the highest level of energy efficiency.
Countless Options – Hung, slider, picture/fixed, casement, awning, bay, bow, architectural, or garden windows. Whatever style your home calls for – we’ve got the windows to fit the bill.
Designs Galore – Choose a grid pattern, unique color, and stunning finish that makes your home’s windows stand out from the cookie-cutter crowd. If you dream it, we can make it happen.
Lifetime Transferable Warranty – Proof that a window manufacturer means what they say about their build quality comes in their warranty – especially when that warranty is as good as it gets.

Free Exterior Remodel Quote

Matt Kavanah

Matt Kavanah is the owner of Milcon Design & Build. He has 20+ years of experience and has a simple philosophy, only the absolute best will do. On every single job. For every single customer. Down to every single detail.

We Also Offer Stunning Sliding Patio Doors For Northern VA Homes

5 Fast Facts About Our Patio Doors

Our sliding vinyl patio doors are made in America by the industry’s most trusted manufacturers.
The frames and glass in our sliding patio doors are made with cutting-edge materials that provide incredible energy efficiency.
Our hinged fiberglass and steel patio doors come from ProVia, and they’re made with the same premium material as ProVia’s entry doors.
ProVia’s fiberglass and steel patio doors can deliver a realistic-looking wood grain texture.
All of our patio doors are backed by our Lifetime Installation Guarantee.

Top-Rated Replacement Windows For Up To 30% Less Than The Big, National Window Companie

Any Window Company Can Say They Have The Best Prices.
Here Are 4 Reasons We Can PROVE It.

We Go Factory-Direct

Whenever possible, we buy our windows DIRECTLY from the manufacturer. No middlemen = no outrageous markup.

Quotes By The Owner

Company Owner Matt Kavanah performs all quotes, eliminating the big, expensive sales staff.

“No-Bloat” Marketing Budget

We keep advertising costs to a minimum so we can keep our overhead LOW.

Accountable, Factory-Certified Installers

We do the job right the first time, so we don’t have to go back a second time. This minimizes “callback” costs.

Years of Experience

0 +

Why Choose Milcon For Your Window Replacement

We Invest Considerable Effort To Ensure You See Nothing But Excellence

As a local window replacement specialist in Northern VA, our community is our focus. So, we excel in finding the right window solutions for your home. And we easily stand out as the better choice in a window replacement industry often associated with less-than-stellar reputations.

Premium Products

As you know well by now – quality is our utmost commitment. From the aforementioned energy-efficient replacement windows to all of our other services, our way of doing things remains the same. Quality first. Quality always – starting with the materials we use.

Find Out More

Experienced Team

Our professionals are our strength. Really. They’re trained and certified replacement window specialists who are, above all, dedicated to their craft. And that dedication shows up on EVERY exterior remodeling project we undertake for our customers.

Find Out More

Locally Owned

We know we say this a lot – because it’s very important to us. As a local business, our community is everything. It gives us a personalized approach and care that many simply can’t match. Especially the big boys who are simply in it for the numbers game.

Find Out More

No-Nonsense Sales Approach

We avoid the absurd sales methods the big national companies love to use, but we’ll never play ‘The Pricing Game’ when it comes to your replacement windows. Our philosophy is simple. Honesty and fair pricing – always.

Find Out More

Strong Values

Our solid core values make us more than unique. They make us who we are. Count on us for exceptional service, quality products, and honest pricing because our beliefs rest on an unshakable foundation of core values.

Find Out More

Get A FREE, 30-Minute Quote (Yep. Just 30 Minutes!)

Call us at today or fill out our hassle-free form to schedule your free quote today!

Free Estimate

Stunning Window Replacements To Inspire You For Your Northern VA Home

Check Out The Level Of AWESOME We Deliver To Your Northern VA Home

RJT-Replacement-Windows-Gallery-Wood-Finished-Casement-Windows-Maryland-Milcon

RJT Replacement Windows Gallery Wood Finished Casement Windows Maryland Milcon

RJT-Replacement-Windows-Gallery-Stunning-Bay-Windows-Maryland-Milcon

RJT Replacement Windows Gallery Stunning Bay Windows Maryland Milcon

RJT-Replacement-Windows-Gallery-Large-Living-Room-Windows-Northern-VA-Milcon

RJT Replacement Windows Gallery Large Living Room Windows Northern VA Milcon

Reviews For Our Replacement Windows And More

When Our Clients Are Happy… We’re Happy

      
   Milcon Roofing, Design & Build
   99 Google reviews 
  Write a review 
  
 
 
   
 
 
       Posted on Google  
   
   Nolian Papa 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent work, and the estimating scheduling process was very quick and hassle free. I'm really glad I went with Milcon.
  
 
      Posted on Google  
   
   Jonelle Hilleary 
 
 
 
 Trustindex verifies that the original source of the review is Google. We’re so pleased to be able to provide this review of our recent window replacements project with Milton Design and Build- all in all, truly a 5 star event.

Owner, Matt Kavanah, followed up on a Thumbtack request for proposals with a home visit to see what we needed and how Milcon Design and Build could help. Matt explained the process, how long it would take to order and get ready for the installation, and most importantly, what we could expect as performance from the ProVia window and door products recommended for our home. Matt indicated that he would have Project Manager, Josh, come out and take precise measurements to make up the order, but for the proposal pricing he was able to give us a very competitive bid based on our conversation that day.

We kept coming back to Matt’s straightforward conversation and the value of the windows we would be ordering. The price and quick time-to-install just sealed the deal.  Matt made some key suggestions that, after our installation today, proved to be great advice.

One of the reasons we chose to do a window replacement now (January) was the cold spots in both our primary bedroom and dining room - opposite ends of our house. Even upgraded  HVAC hadn’t been able to overcome the heat loss. Tonight, with a new package of high-efficiency thermally broken windows and sliders installed, we’re actually turning the thermostat down because we’re warm!

Thank you to Matt, Josh, Luis, Martin, and the rest of the crew for a great job, for explaining all the tips and techniques to get the most out of the new windows and front door, as well as to keep them looking beautiful for years to come!

Thank you, Milcon Design and Build for working with us on this purchase… you guys are awesome!
  
 
      Posted on Google  
   
   Thomas Volk 
 
 
 
 Trustindex verifies that the original source of the review is Google. Outstanding! After weeks of countless window contractor interviews, we found the perfect company. Matt at Milcon, with his many years of experience, provided us with detailed product descriptions to meet our environment requirements, that included muffling the Ashburn  Data Center and air traffic noise. They installed over 40 windows in two days! Most important, my wife is so happy with our choice.
  
 
      Posted on Google  
   
   Willmer Romero 
 
 
 
 Trustindex verifies that the original source of the review is Google. I went to Milcon for a quote and they came in under the competition. The staff was super professional and did everything I asked for. The team was quick and was done within hours. I would go back for any future projects.
  
 
      Posted on Google  
   
   Bernadette Rahmani 
 
 
 
 Trustindex verifies that the original source of the review is Google. Matt was very professional, gave us very good advice for the 2 massive doors we had to replace. We were very happy with the process, the execution of the project and the products. We had a very pleasant experience with Matt and his installation crew. Thank you so much.
  
 
      Posted on Google  
   
   Meghan Kavanah 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent customer service. Quick install. Impeccable job. Would highly recommend!
  
 
      Posted on Google  
   
   Josh Evans 
 
 
 
 Trustindex verifies that the original source of the review is Google. Right on time. Matt and his team did what they said they were going to do when they said they were going to do it. Painless process from start to finish. I had a new roof in about 48 hours. Highly recommended.
  
 
      Posted on Google  
   
   Justin Houghton 
 
 
 
 Trustindex verifies that the original source of the review is Google. We were in need of a roof replacement so we threw out a few requests on Thumbtack and I’m glad we did since it brought us to Milcon Roofing. Matt reached out very quick and if I recall correctly came out the following day to discuss options. He wasn’t pushy or trying to just sell me something. It was clear he has been in the business for years and more or less just informed me of my options. He also noted his crew gets certified on the roofing systems which we really liked. So we needed up asking for a quote and it was very fair and competitive.

I will say, Matt was very professional, quick to reply to texts, his quote was very fair, and his crew was on time and knocked out the job out in less than one day. Oh, also their clean up was outstanding.

While I hope to never see Matt again (since the roof will last many more years than we should be here)  I would 100% call him back for any future work here or at our next home.

If you need a new roof, give them a call, you won’t regret it!
  
 
      Posted on Google  
   
   Jorge Manuel Trasmonte 
 
 
 
 Trustindex verifies that the original source of the review is Google. We hired Milcon Roofing, Design & Build for replacing the original aluminum siding on our house. Matt took the time to explain different options and we opted for the insulated siding. Matt was very easy to work with and communicated with us through the entire process. The work crew did an great job despite some days with rough weather. We are very happy with the results, less cold drafts, a reduction in noise and a more modern looking exterior. Everything looks great! Can't recommend enough.
  
 
      Posted on Google  
   
   Kristina Milberg 
 
 
 
 Trustindex verifies that the original source of the review is Google. Matt and his team were great to work with, would recommend!

Northern VA MD Replacement Window FAQs

Your Questions. Our Expert Answers.

How long does it take to replace a window?

The timeframe for window replacement depends on several factors, including the type and number of windows and the condition of the existing window frames. However, generally speaking, the actual installation of a single window can be completed in under an hour when done by an experienced technician. It’s important to note that custom orders or specialty windows may extend the timeline due to manufacturing lead times.

What type of windows will Milcon Design & Build Replace?

Most, if not all, types of windows are eligible for our expert window replacement. Our team handles everything – from consultation to installation – ensuring a perfect fit every time. We work with different window types, including double-hung, casement, picture, bay and bow, and custom designs. We can also assist with energy-efficient and sound-reducing windows.

What is your process of window replacement like?

Our window replacement process starts with an easy consultation, where we assess your needs and offer you an initial quote. Our professionals then take precise measurements to ensure a snug fit. Once the windows are ready, we schedule an installation date. On the day, our skilled team carefully removes the old windows, installs the new ones, and performs a thorough clean-up afterward. One thing you can be sure of is a professional, respectful, and friendly installation.

Ready to Know more About Us

Don't hesitate to explore more.

Learn More

Get A FREE, 30-Minute Quote (Yep. Just 30 Minutes!)

Ready to “cut the fluff” and get a no-nonsense Northern Virginia exterior remodel starting with a stress-free, 30-minute, no-obligation quote from the owner himself?

Then call us at 703-581-2761 or fill out our hassle-free form to schedule your free quote today!

Replacement Windows

Energy-Efficient And Stunning Double-Pane Northern VA And MD Replacement Windows

Curb-Appeal. Robust Security. Durability For Decades.