Energy-Efficient Vinyl Window Replacement for Residential Homes
Cut energy bills and boost curb appeal with custom vinyl window replacement from Legacy Glass Block & Window Co. Family-owned since 1986.
We install energy-efficient replacement windows — including vinyl casement and basement windows. Backed by a lifetime warranty with zero money down.
Stop Drafts and Lower Your Energy Bills
-
Lifetime Warranty
-
Maintenance-Free
-
Energy-Efficient
WHY CHOOSE LEGACY FOR WINDOW REPLACEMENT
Impeccable 1-Day Installations & Lasting Protection
Even the best window requires perfect installation. As a family-owned operation, we prioritize absolute precision and respect for your property.
-
Precision Measurement & Custom Fabrication
Every single-family home settles differently over time. We take exact, down-to-the-millimeter on-site measurements so your new windows are custom-fabricated to slide flawlessly into your existing openings, ensuring zero gaps for water mitigation or air leaks.
-
The Legacy Installation Standard
Our trained installation crews complete most full-home window replacements in a single day. We insulate, apply premium caulking, cap the exterior trim for a maintenance-free finish, and haul away all debris, leaving your home spotless.
Popular Window Types
Your home deserves window solutions that offer more than just a new look, they should provide lasting structural integrity and climate control. We specialize in seamless, professional vinyl window upgrades that deliver a maintenance-free finish and a significant return on your home investment.
Energy-Efficient Vinyl Windows Built to Last
We don't believe in temporary fixes. Replacing the windows on your single-family home should be a one-time investment that immediately elevates your property value and permanently lowers your utility bills.
-
Advanced Thermal Engineering
Low-E glass with argon gas blocks winter cold and reflects summer heat, so your rooms stay comfortable year-round and your energy bills drop.
-
The Lifetime Craftsmanship Guarantee
We protect your investment long after the truck pulls out of your driveway. We pair industry-leading manufacturer warranties with our own strict guarantee on installation labor. If there is ever a defect, our local team makes it right. No questions asked.
Common Questions About Upgrading Your Exterior Windows
-
Double-Hung Windows
The timeless standard for tilt-in ease of cleaning.
-
Casement Windows
Engineered for unobstructed views and a weather-tight seal when locked.
-
Slider & Picture Windows
Perfect for maximizing natural light in any living room and family spaces.
-
Vinyl Basement Windows
Durable, energy-efficient replacements built to seal out drafts and moisture.
Why Homeowners Choose Legacy
-
40+ YEARS IN BUSINESS
Family-owned and installing windows across Will, Cook, and DuPage counties since 1986.
-
5-STAR GOOGLE RATING
Homeowners consistently rate us five stars.
-
LIFETIME WARRANTY
Every window we install is backed for as long as you own the home.
-
NO SUBCONTRACTORS
Our own crews handle every install, start to finish.
REAL FEEDBACK FROM YOUR NEIGHBORS
Before you decide, hear from homeowners we've helped upgrade their windows.
WHAT TO EXPECT DURING YOUR EXTERIOR PROJECT
-
REQUEST YOUR FREE QUOTE
Tell us what's failing and we'll come look at it — no charge, no pressure.
-
PRECISE ON-SITE MEASUREMENTS
Our team visits your house to take precise window dimensions.
-
SINGLE DAY INSTALLATION
Most full-home window replacements are finished in a single day.
-
COMPLETE SITE CLEANUP
We haul out the old windows and leave the space clean.
CLAIM YOUR FREE IN-HOME CONSULTATION
MAKE YOUR PROJECT AFFORDABLE
-
Manageable Payment Structures
-
Pay Nothing on Day One
-
No Interest Financing Available
