YOU CAN COUNT ON US
Window Contractor Serving St. Louis (and Doors).

We’re a family-owned and operated, window and door contractor serving St. Louis and surrounding cities. Our company was founded in 2014 by our founder, Andrew Lombardozzi. A carpenter by trade, Andy has over 15 years of windows and doors installation experience. Trained and mentored by his father, a 40-year veteran; together they have recruited the best in skilled and dedicated men and women to form the STL Windows and Doors team.
Our priority is to exceed industry standards and customer expectations. We offer the best replacement window and exterior door products. We serve Saint Louis, Saint Charles, Jefferson, Franklin, and Lincoln counties and guarantee you’ll always be treated like our family, with respect and close personal attention.
STL Windows and Doors is a certified Provia Window and Door dealer.
- Double Hung
- Sliders
- Casement & Awning
- Picture
- Garden
- Bay & Bow
- Architectural
- Cut Out Windows (adding where no opening exists)
- Entry Doors
- Storm Doors
- Patio Doors
- Cut Out Doors (adding where no opening exists)
MEET OUR TEAM
We love what we do. Our pledge: to take great care of your needs before, during and after the job.
HUMBLY CONFIDENT
Window Contractor (and Door) Skills
As window contractors (and doors), we have decades of experience. Whether you hire us as a product advisor or an actual installer; no matter the need, we can help. We’ll be meticulous in taking precise measurements of your St. Louis home and get your project done right, on budget, and on time.
WHAT TO EXPECT
OUR SIMPLE, YET PROVEN PROCESS
Talk With Pro
Through a free, no-obligation estimate you’ll share your needs with a professional that will, in turn, set up a time to meet with you in your home.
ONSITE ASSESSMENT
While onsite, we’ll answer questions, show you sample products, and take all the necessary measurements to put an estimate together.
DELIVER ESTIMATE
With all the details in hand, we’ll draft, polish & deliver a thorough competitive estimate including clear pricing & installation details.
We’re Accredited & Back-Up Our Workmanship

OUR SERVICE AREA
If you need window installation (or door) across Saint Louis, Saint Charles, Jefferson County, Franklin County, or Lincoln Counties, count on us to deliver. We’re continually expanding our service area, so always check with us using our free no-obligation estimates here.
Window Contractor FAQ
Here are some frequently asked questions about us as window contractors. If you have other questions, please get in touch with us!
REQUEST A FREE ESTIMATE
Ready to take the next step? If you live in or around St. Louis, pick a deal on our free estimate form! You can count on us!