Stanek Windows by Great Day Improvements
Great Day Improvements Patio Enclosures by Great Day Improvements Stanek Windows by Great Day Improvements
Reps available: Mon-Thur 9am-8pm
Fri 9am-7pm  |  Sat-Sun 9am-1pm EST
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Serving Northern Virginia And Surrounding Areas

Stanek Windows in N. VA

8436 Kao Circle
Manassas, VA 20110
Northern Virginia area Manager

Managed By Tom Edger

  • For Service or Warranty
  • Call: 703-690-2000
  • License Information
  • DC #420214000016
  • VA #2705157137
  • MHIC #132308

Local Reviews

We take pride in each and every window and door we manufacture and install. We offer quality materials and craftsmanship, but you don't have to take our word for it. Our satisfied customers are more than happy to share the positive experience they've had while working with Stanek Windows through the years.

Check out some local reviews or leave one of your own on the following websites:

Angie's List Review us on Angie's List Google Review us on Google Houzz Review us on Houzz

“From the salesperson (Charles) to the installation supervisor (Rick) to the office staff (Nichole/Teresa), and the installation team (Joel, Rich, Maurice, Juan), the quality of service was impeccable. The installation was so smooth that I did not have to worry. The team arrived early, were very neat and clean, and picked up all debris. I would definitely use Stanek Windows again.” – Prashant R., Herndon, VA | June 22, 2017 * * * * *

“Everyone who I dealt with at Stanek was very professional and willing to accommodate my schedule. We are very happy with the door that was installed.” – Alisa W., Kingstowne, VA | December 12, 2016 * * * * *

Products & Services

Patio Enclosures

Patio EnclosuresPatio Enclosures custom manufactures every sunroom to meet your style and budget. Let our design consultants work with you to see what's best for your home and lifestyle.

Stanek Windows

Stanek Windows by Great Day ImprovementsIncrease the energy efficiency of your home and reduce energy bills with the highest quality replacement windows and doors.

Backyard Solutions

Backyard Solutions by Great Day ImprovementsImprove your outdoor space. Add shade, beauty and practical solutions that enhance your enjoyment of your backyard.

Specials & Financing

Stanek Windows is dedicated to making our products and services affordable for our customers. As a result, we try to present offers and specials throughout the year, so check back often or follow us on Facebook.

About Us

About Stanek Windows in Northern Virginia

We proudly serve the Northern Virginia area including the following counties; Alexandria, Clarke, Culpepper, Fairfax, Fairfax City, Falls Church, Frederick, Fredericksburg, King George, Loudoun, Manassas, Prince William, Rappahannock, Spotsylvania, Stafford, Warren and Winchester. Contact our Northern Virginia office for your next Stanek Windows project or simply fill out our online form to schedule your free in-home estimate.

Hours of Operation

  • Monday
  • Tuesday
  • Wednesday
  • Thursday
  • Friday
  • Saturday
  • Sunday
  • 8:30 a.m. - 5:00 p.m.
  • 8:30 a.m. - 5:00 p.m.
  • 8:30 a.m. - 5:00 p.m.
  • 8:30 a.m. - 5:00 p.m.
  • 8:30 a.m. - 5:00 p.m.
  • By Appointment
  • By Appointment

Certifications & Associations

  • Qualified Remodeler’s Top 500 of 2021 (#11)
  • Remodeling 550 of 2020 (#10)
  • Qualified Remodeler’s Top 500 of 2020 (#18)
  • HIP 200 of 2020 (#16)
  • Remodeling 550 of 2019 (#14)
  • Qualified Remodeler’s Top 500 of 2019 (#21)
  • HIP 200 of 2019 (#18)
  • EPA Lead-Safe Certified Firm
  • Licensed, Bonded, Insured

Payment Options

Northern Virginia Location Overview

The Stanek Windows brand is new to the Northern Virginia market, but has a proven history. What makes us different is the fact that we are not just a window retailer. We design and make the windows we sell and install. We call ourselves window experts because we are. Every window is custom designed and custom made for your home specifically in our Cleveland-based manufacturing facility. Expert installation of our windows is handled by our local, experienced installation teams who pride themselves on customer satisfaction.

If you are thinking about replacing the windows in your home, consider Stanek Windows. Our windows and patio doors have earned among the highest structural and thermal ratings in the industry providing you with the energy-efficiency, security and durability you’d expect from a quality built window. But what you’ll really fall in love with is the way our windows look and operate. Our windows don’t look like typical replacement windows, the attention to detail is exquisite and with endless custom options, you can truly create the perfect windows for your home.

We make the process of replacing your windows easy and stress-free. To schedule your appointment with one of our experts simply call 1-800-230-8301 or click to schedule online today. We look forward to learning about your specific project and how we can help!

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