Capitol Improvements | Replacement Windows Near You in Washington DC

Fair to you.

We're window replacement contractors in Washington DC providing quality products, professional installation, and lifetime manufacturer backed warranties. All for a fair price.

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Windows - Washington, DC

Recent window replacement in Washington DC

Making an old home efficient.

Many of the windows in DC row homes are old and in-efficient. It is very important that you install a energy efficient window and door package because in many of the DC homes there are only a few ways to improve the energy efficiency of a older row home. You can upgrade the windows and doors, install a reflective roof, and possibly encapsulate the crawlspace (if you have one).

One of the tricky things about windows in DC is working to meet DC's historic preservation society requirements but upgrading to a efficient window package. Fortunately we have options for you if you need historic windows that look historic but perform to todays performance standards.

Another rarely thought of way to increase the energy efficiency of your home is on your Washington DC homes flat roof! We use a white membrane called TPO that reflects the heat. In addition to that it is one of the few places to add additional insulation. We can insulate a flat roof all the way up to an R30 value!

Window Replacement Near You in Washington DC
Window Replacement Company Washington DC
Historic Windows Washington DC
Replacement Windows Washington DC

30+ Years’ Experience

Thousands of satisfied home owners across Maryland and DC.

Lifetime Warranties

Highly certified with Atlas, GAF, Mastic, James Hardie & more.

Value Focused

A family team proud to deliver excellence at a fair price.

Services we offer

We offer replacement services for roofing, siding, windows, gutters, exterior trim, decks, patios, and doors.

Vinyl Replacement Windows

Efficient and long-lasting. We install premium vinyl replacement windows that meet or exceed Energy Star requirements. Learn more.

Wooden Window Installation

Wooden windows give a home a premium look and are long lasting. Whether you are looking for true wood or Aluminum clad wooden windows we have you covered. Learn more.

Historic Windows

Many do not realize all of the history here in the DMV. Whether you are in a historic home in Annapolis or Washington DC we have a custom window manufacturer that can create windows to meet historic specifications. Learn more.

Replacement Windows

Replacing your windows is one of the easiest ways to make major gains to your homes energy efficiency. Let us replace your windows with a quality product at a fair price. Learn more.

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Lance & Ryan
Window Consultant & Foreman Serving Washington DC

We serve Washington DC

Our DC locations serves Washington DC and all the neighborhoods in DC with our full line of services.

1015 15th St NW #635
Washington, DC 20005


Local Review in Washington DC

"Hired Capitol Improvements to completely redo our roof. The team was very professional all around - responsive, accommodating, respectful of our property, forthright and transparent about options and costs. We're very pleased with the work, having already noticed a big difference in temperature control upstairs with our new, better insulated roof. We wanted something lasting and high quality, and with the warranty they provide I'm satisfied that's what we got. Would definitely recommend and use them again."

David Cooper
Google Review

We don’t just work for you, we work with you.

We’re a family here at Capitol Improvements, and we treat you like family too. Whether you’re overwhelmed with an immediate need or looking to refresh your home, our experts will provide clarity and lasting solutions for your specific needs.






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We'll answer your questions and get you what you need to get your project done right.

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