Capitol Improvements | Replacement Windows Near You in Gaithersburg MD

Fair to you.

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

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Window Replacement Near You in Gaithersburg Maryland

Recent window replacement in Gaithersburg

Energy Efficient Window Replacement

Product: Vinylmax
Type: Premium Vinyl
Energy Star Rated Vinyl Replacement Windows

Windows from Vinylmax were rated as Energy Stars Most Efficient list for over 5 years straight. We removed old in-efficient aluminum windows and installed new vinyl windows. By stopping the drafts we have already saved this homeowner on their energy bills and they love the way these new windows function.

Window Replacement Near You in Gaithersburg Maryland
Window Replacement Company Gaithersburg Maryland
Replacement Windows Gaithersburg MD
Window Replacement Gaithersburg Maryland

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.

Wood 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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Pat & Ryan
Project Consultant & Foreman Serving Gaithersburg

We serve Gaithersburg MD

Our Gaithersburg location serves the greater Montgomery County with our full line of services.

7916 Plum Creek Dr.
Gaithersburg, MD 20879


Local Review in Gaithersburg Maryland

"Capitol Improvements did a superb job installing aluminum coil over wood exterior trim at our DC home. Pat was a pleasure to deal with-- exceptionally straightforward, meticulous and professional. Communication with the company was excellent. I was very satisfied with the work, and the crew was fast, polite and did quality work,. I will definitely use Capitol again! Update June 2021 - We just had Capitol do a major job on replacement windows for our home. The same crew led by Ryan did the installation, with the same high quality work, politeness and professionalism. The windows are beautiful, and will save energy and enhance the appearance and value of our home. We are very pleased with he high quality work. We have hired Capitol to do a roof replacement, coil wrap and gutters project on a rental property. Capitol is a pleasure to work with and we highly recommend them and their services."


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.






Let's start your project

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

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