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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, Lower Your Energy Bills, and Keep Your Home Comfortable Year-Round

  • Lifetime Warranty

  • Maintenance-Free

  • Energy-Efficient

A brightly lit living room featuring newly installed, energy-efficient double-hung windows and a sliding glass patio door by Legacy Glass Block & Window Co. in the South Suburbs.

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.

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  • The Legacy Installation Standard

​​Our trained installation crews will complete a full-home window replacement in just one day.  We meticulously insulate, apply premium caulking, cap the exterior trim for a maintenance-free finish, and haul away all debris, leaving your home spotless.​​​​

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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 

​​Every window we install features durable vinyl frames and double-pane, Low-E glass with argon gas.  This combination effectively blocks brutal window cold and reflects intense summer heat away from your living space.

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  • 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.​​​​​

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Common Questions About Upgrading Your Exterior Windows

Read Our Window FAQs

  • Double-Hung Windows 

​​​The timeless standard for tilt-in ease of cleaning.

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  • Casement Windows 

​​Engineered for unobstructed views and a weather-tight seal when locked.

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  • Slider & Picture Windows

​​Perfect for maximizing natural light in any living room and family spaces.

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  • Vinyl Basement Windows​

​Durable, energy-efficient replacements built to seal out drafts and moisture.

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Why We're Industry Leaders

  • SEASONED INDUSTRY LEADERSHIP

Lean on our 40 years of professional experience for the true seasoned industry leadership your home deserves.

  • CONSISTENTLY TOP-RATED LOCAL SERVICE

Experience consistently top-rated service that earns glowing, authentic reviews from satisfied homeowners across the entire region.

  • FULLY GUARANTEED LIFETIME PROTECTION

Our commitment to excellence includes a guaranteed lifetime protection policy that you can trust for your home.

  • CERTIFIED PROFESSIONALS

Our reliable and certified professionals deliver flawless, high-quality results on every single project we perform for you.

REAL FEEDBACK FROM YOUR NEIGHBORS

Before you decide, hear from homeowners we've helped upgrade their windows. 

 

Read window replacement reviews →

WHAT TO EXPECT DURING YOUR EXTERIOR PROJECT

  • REQUEST YOUR FREE QUOTE

We will provide a completely free consultation for your home.

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  • PRECISE ON-SITE MEASUREMENTS

Our team visits your house to take precise window dimensions.

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  • SINGLE DAY INSTALLATION

We guarantee your new windows are installed in one day.

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  • COMPLETE SITE CLEANUP

Our respectful crew thoroughly cleans your property after finishing work.

CLAIM YOUR FREE IN-HOME CONSULTATION

MAKE YOUR PROJECT AFFORDABLE

  • Manageable Payment Structures​

  • Pay Nothing on Day One

  • No Interest Financing Available

Promotional graphic advertising Zero Money Down and 0% Financing for glass block installation and home exterior window replacement projects by Legacy Glass Block & Window Co. in the Chicagoland area.
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