Service Areas

Milcon Design & Build
New Door Installation

Design & Build Services In Herndon, VA, From
The Local Team Of Experts

Let Milcon Handle The Work So You Can Relax

Do you have a never-ending to-do list for your Herndon, VA, home? You can complete small things on your own, like cleaning gutters, cleaning the HVAC, and replacing your screens. But for more significant tasks, like roof replacement or upgrading your doors and windows, you need a design and build company that’s reliable and trustworthy.

At Milcon, our local team of experts is here to help. We offer a full range of design and build services that will transform your home into something you can be proud of. Our skilled professionals have years of experience in the construction industry, so they understand what it takes to create a quality product that lasts many years.

Don’t leave those larger projects up to chance – hire the Fairfax County professionals who know how to do the job. Milcon is the design and build company you can rely on for quality service and beautiful work so you can sit back, relax, and enjoy your beautifully updated home.

Our Design & Build Services

Our design and build services were designed to make the process as simple for you as possible. We handle it all and do it with precision.

Asphalt Roofing

We install asphalt roofing for your Herndon, VA, home with expertise. Our teams only use the premium line of GAF Lifetime Roofing systems with the Golden Pledge standard. These products come with fantastic guarantees and will have no problem standing up against the harsh Virginia weather.

If you’ve already started searching for a roofing company in your area, you know there is no shortage of providers.

But most clients choose to work with us because of our efficiency and prices. We can install a top-notch GAF roof for up to 30% lower price than the competitors. The entire system will ensure your roof replacement is beautiful and strong enough to last decades.

Window Replacement

Our window replacement services only use RJT Industries windows. These windows are designed in Virginia, so you can rest assured they provide top performance in all four seasons.

The windows are designed to handle the frigid lows in the winter and the hot and humid summer temperatures, effortlessly going from one extreme to another.

Door Replacement

Whether you need a fiberglass or steel entry door installed, or if you want to update your patio doors, our door replacement services are here to make your home look amazing. We utilize ProVia fiberglass and steel entry doors for all replacements.

These doors are not only gorgeous, but they are built to last. Our patio doors are made by RJT Industries and manufactured for our weather.

Vinyl Siding

CertainTeed is the brand of siding we install on homes in the Herndon, VA, area. CertainTeed offers numerous styles, including classic looks, shiplap, board, batten, beaded, and more. Plus, with the multiple color options, we can give your home an entirely new look!


For some of our competitors, the trim around your new windows and doors is an afterthought. But not for us – we pay attention to every detail. We painstakingly install and upgrade your trim to maximize efficiency, to build a cohesive look, and to increase your curb appeal.


We install five and six-inch aluminum gutters that direct water away from your roof and to the ground where it needs to go. Often, our gutter services work hand in hand with a roof replacement.

Why Do People Turn To Us?

There are several reasons why people turn to us when needing any build and design service. However, one of the most prominent reasons people turn to us and recommend us is because we believe in fairness in everything we do.

When you call us for a quote on any of our services, we will arrive and get right down to business. No pushy sales tactics – just factual information you can use to decide.

We always show our customers respect and courtesy, even during the replacement process. We treat your home as if it were our own, leaving no mess behind and respecting it.

FAQs About Design & Build Services

Can I Have One Window Replaced At A Time?

While you can go with the one window-at-a-time process, you may find it cheaper and more energy efficient to do all your windows simultaneously. Or at least the windows on one side of your house at a time. We can discuss with you what your options would be to find what works best for you.

Does Roof Replacement Take Weeks To Complete?

No! Once we have the materials for the roof, we will schedule you and arrive on the day to do the work. Depending upon the size of your roof, it may only take a day or two to complete it.

Should A Person Always Replace Their Gutters When Doing
A Roof Replacement?

This all depends on the age and condition of your gutter system. We will take a look at your gutters and give our honest opinion on what’s best for your home. We never upsell or oversell services – just transparent recommendations and work.

Will Steel Entry Doors Look Too Commercial For My Home?

No, not with the options that we have. While they are steel, you can choose from many aesthetics to ensure the entry door looks appealing and boosts your curb appeal.

Free Estimates For Your Design & Build Needs In Your
Herndon, VA, Home

If your Herndon, VA, home requires our design and build services, whether you need a roof replacement or a new door installation, we are here for you.

Contact us or call us today at (703) 581–2761 to schedule your free quote!


Book Your Free 30-Minute Quote

(Yep. Just 30 Minutes!)

  • Zero sales pitches and pricing games
  • Quotes performed by our company owner
  • We DON’T require significant others to be present