
Trying to get all the items on your to-do list done for your Great Falls, VA, home is difficult without the help of design and build services. Luckily, we are here to provide stellar service for all your design and build needs.
Milcon Design & Build has been serving the Fairfax County area for years, providing numerous design and build services to help you get your home looking spectacular. Plus, many of our services will also help improve your energy efficiency!
We are the go-to call to make when you need window, door, siding, gutter, roof replacement, and trim work. We do it all so you can rest easy knowing the professionals have your home handled and it is in good hands.

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.

When it comes to roofing, we provide the best asphalt roofing in the industry. We only use GAF roofing systems which ensures your home is protected. Plus, they are gorgeous once installed, helping increase curb appeal.

We offer aluminum gutters in both five and six-inch sizes. With the proper gutter system in place, your roof will function even better, offering another layer of protection to your home.

We install CertainTeed siding on homes in the Great Falls, VA, area. Why CertainTeed? It is durable, has a guaranteed lifetime of performance, is maintenance-free, and is available in over 40 color options.

We offer several door replacement options, including steel and fiberglass entry and patio doors. We utilize the doors from ProVia as they have been shown to hold up well over the years in the Northern Virginia weather.
Our vinyl patio doors are from RJT, the trusted manufacturer we use for window replacements.

We proudly deal exclusively with RJT Industries for all our window replacements. Why RJT? Because they are made right here in Virginia for the weather we experience.
There are a variety of styles to choose from, so homeowners can easily find something that fits their needs and the overall look they are going for with their home.

We do all the trim work necessary when replacing siding, doors, or windows. The trim is a vital component of ensuring your new upgrades function flawlessly.
You can expect the same level of perfection with our trim as you would with the siding, door, and window replacement process.

The members of the team at Milcon Design & Build all have their specialties. This means we have crews that only work on roofs, those who install siding, and some that only work with windows. By specifying what people do, they do it at the best level!
We value being personable, polite, and approachable when dealing with any design and build job. This extends to the clean-up process when the work is done. When we are finished, the only sign we have been at your home is the new look of your home.
We stand out from the competition because we don’t believe in installing substandard materials. That is why we work with specific manufacturers. We want our customers only to have the best installed in their homes.
No one wants to feel pressured regarding the design and build services their home may need. That is why we don’t charge for quotes, and we email you our findings, so you can decide in private how to proceed. However, we are still here to answer your questions without pushy sales tactics.
Posted on Google Nolian PapaTrustindex 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 HillearyTrustindex 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 VolkTrustindex 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 RomeroTrustindex 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 RahmaniTrustindex 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 KavanahTrustindex verifies that the original source of the review is Google. Excellent customer service. Quick install. Impeccable job. Would highly recommend!Posted on Google Josh EvansTrustindex 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 HoughtonTrustindex 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 TrasmonteTrustindex 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 MilbergTrustindex verifies that the original source of the review is Google. Matt and his team were great to work with, would recommend!
Yes.
At Milcon Design & Build, we understand investing in your home’s exterior can be a significant undertaking. That’s why we offer flexible financing options to our customers in the DMV area.
We’re committed to making our top-quality siding, windows, and entry door services more accessible and affordable for you.
Aside from your initial call and having owner Matt Kavanah take care of your zero-pressure consultation, and prepare your home for the install… not much!
It’s a process designed to leave you feeling no stress yet in the know about the entirety of your exterior remodel – every step of the way.
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.
Our partnership with CertainTeed ensures we provide you with industry-leading vinyl siding, known for its PermaColor™ Lifetime Fade Protection – which ensures vibrant color for decades. Our siding also boosts thermal efficiency, potentially reducing energy loss by up to 20%.
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!