Advanced Window Systems has helped over 5,000 northern Illinois homeowners improve their homes with honest pricing, top-brand products, and expert installation — for over 30 years.
What We Install
Energy-efficient windows, beautiful doors, and durable siding — installed by Rockford's most experienced crew.
Windows Image
Energy-efficient replacement windows that cut heating bills and boost curb appeal. Lindsay Windows and other top brands — custom sized for your home.
Doors Image
Entry doors, patio doors, and storm doors that improve security, insulation, and your home's first impression. Albany Door products installed with precision.
Siding Image
Durable, low-maintenance vinyl siding that protects your home from harsh Midwest weather — and transforms the way it looks from the street.
Why Rockford Chooses Us
We're not a big national chain. We're your Rockford neighbors — and we stand behind every installation we do.
We stock Lindsay Windows, Albany Door, and other top-rated brands. No shortcuts, no cheap imports — ever.
Our trained professionals have installed thousands of windows and doors across northern Illinois since 1990.
No hidden fees, no pressure sales. Just honest quotes and straightforward pricing you can trust.
Our products reduce heating and cooling bills — saving Illinois homeowners real money every year.
Simple Process
No pressure, no confusion — just a clear, simple path to beautiful new windows and doors.
Call us or fill our form. We visit your home, assess your needs, and take measurements — zero obligation.
Receive a detailed, honest estimate with product options at different price points — no surprises ever.
We order your windows or doors custom-sized to your exact openings from our trusted manufacturers.
Our crew arrives on time, installs cleanly, and leaves your home better than when we arrived.
Real Reviews
Don't take our word for it — here's what our neighbors have to say.
Advanced Window Systems replaced all 14 windows in our home. The crew was professional, clean, and finished in one day. Our heating bill dropped noticeably the very next winter!
Got three quotes and Advanced Window Systems was the most honest. No upselling, just good products at a fair price. The patio door looks incredible and seals perfectly.
We've used Advanced Window Systems twice — windows and then siding. Both times exceptional workmanship and zero hassle. This is what a local business should be.
We Come to You
Based in Loves Park, we serve the greater Rockford metro and all surrounding communities.
Ready to Start?
Free estimate · No pressure · Honest pricing · Serving Rockford since 1990
Loves Park, IL · Mon–Fri 8AM–5PM
