Get a free preliminary estimate in just 5 minutes!

At Certified Window Co., we believe that getting a preliminary estimate should be fast, easy, and pressure-free.

Many of today's quality vinyl windows offer similar features and performance, so in most cases we can provide you with a realistic preliminary estimate over the phone in about five minutes.
If the preliminary estimate fits your budget, we can move forward…

1. Text a picture of one of your existing windows and the quantity of windows you’ll be needing to (703) 975-5500.
2. We’ll reply with a realistic estimate within 5 minutes.
3. If that preliminary estimate fits your budget, we can schedule a mutually convenient time for an in-home visit.
4. At this point, a team member will come out and carefully measure all your windows and answer any questions you might have.
5. You will then receive a contract with final pricing via email.
6. Once the contract is signed and a deposit is made, we will order your windows (this usually takes 3 to 5 weeks).
7. Once your windows arrive, we will contact you to schedule the installation date.
8. Easy peasy!

We look forward to providing you with expertly installed, premium vinyl windows, at wholesale prices, and a stress-free experience!