
When your Hillsboro, VA, home needs a transformation, it can be difficult finding a design and build service your trust. After all, this is your home, and you want whatever design and build services you may need to be done to be correct.
For those in the Loudoun County area, Milcon Design & Build is proud to be a part of the community offering the services homeowners need, backed by many satisfied customers. You can trust us to handle whatever it is you need to be done.
From window installation to roofing, we handle it all with a smile. We want you to be ecstatic with your home once we complete the project and know your home has been 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.

Our asphalt roofing services are designed to give you a strong and sturdy roof that will look gorgeous. We work exclusively with GAF Lifetime Roofing Systems backed with the Golden Pledge standard.

Windows age and ultimately need to be replaced to ensure your home is as energy efficient as possible. We take the guesswork out of finding windows, as we use RJT Industries windows manufactured in Virginia with our climate in mind.

Our vinyl siding services are meant to give your home a new look with CertainTeed vinyl siding. We chose CertainTeed because it is gorgeous but maintenance-free, includes a lifetime guarantee, has over 40 colors, and offers an insulated siding option.

We offer fiberglass entry doors, steel entry doors, and patio door replacements. Our fiberglass and steel doors are made by ProVia, some of the best on the market. Our vinyl patio doors are from RJT Industries.

We install five and six-inch aluminum gutters as part of our gutter services. Often, the installation happens simultaneously with our roofing because the two components of your home work together to direct water away from your house.

Our trim services are meant to make your vinyl siding and window installation process even better by ensuring a snug fit. However, the trim used on your home can also be a statement in design. Remember, vinyl siding and window installation must have trim to fit properly.
We will not give our customers an elaborate sales pitch to go with us. Instead, we give free quotes that take about 30 minutes to complete. We will email the quote to you so you don’t feel forced to decide right then.
We try to make the design and build process as stress-free as possible for our clients, and sitting through sales pitches is stressful.

Those who work for Milcon specialize in one service. Doing so allows our installers to become specialists in their trade. In turn, it means your home will always get the best remodeling from those who are masters of their craft.
With Milcon Design & Build, you don’t need to worry about how the crew is acting, and you will be treated with respect. We ensure that everyone is always on their best behavior.
You never have to worry about harsh language, music being played too loud, or disrespect. Everyone on the team treats each other and our customers respectfully and courteously.
Our motto is “Install only the best. Blacklist the rest.” That is why we have certain manufacturers we work with. These include GAF roofing, CertainTeed siding, RJT windows, and ProVia doors.
These brands have been proven to work in our climate and are a great investment for homeowners.
We cut out the middleman with the products we offer clients to offer our customers better prices. Our affordable rates are why so many people offer our name to their friends and family – as they will get a fair price on any work needing to be done.
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!
We do! If your Maryland or Northern VA home needs new siding, contact us today. Our quotes are as quick as 30 minutes, and they’re performed by company owner Matt Kavanah.
We partner with industry leaders in exterior services materials – GAF for unbeatable roofing, local DMV RJT for replacement windows and patio doors, ProVia for beautiful entry door systems and CertainTeed for durable vinyl siding.
So you can be certain that our manufacturer warranties are the top of the line.
Many come with lifetime transferable warranties.
Why?
Because when you work with the best, you get the best.
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.
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.
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!