“We completed all our windows in our home and they look amazing. Greg and John were great to work with. They showed up on schedule and were great communicators.”
AJ S.
Naperville, IL · Google review
Window Replacement · Downers Grove, IL
Claim $500 off your Downers Grove window replacement.*
Owner-operated window replacement for Downers Grove homeowners. A written fixed price, a lifetime warranty, and never any pressure.
5.0 on Google- No-pressure consultation
- Written fixed-price quote
- Lifetime warranty
- Fully insured
21
Months — no interest if paid in full†
Financing available on approved credit.
†Subject to credit approval.
Claim $500 off your window project*
Tell us a little about your home. We'll call to set up your free, no-pressure consultation.
*With purchase of 4 or more windows.
No obligation. No pressure. Your information is never shared.
Your $500 off is reserved.
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(773) 964-4260Reviews
What our neighbors say.
“I had a great experience with this window installation company! The owner was extremely helpful and always quick to respond. The installation was done efficiently and with great care, everything was clean, quick, and professional. It's clear they take pride in their work.”
Natalia N.
Elmhurst, IL · Google review
“We had a fantastic experience with Illumination Windows. They were knowledgeable, friendly, and attentive. The windows we chose are high quality, reasonably priced and manufactured locally in Illinois. The team arrived on time, worked efficiently, and treated our home with great care. The difference is remarkable: our home is quieter and more comfortable.”
Rich and Judy D.
Elmhurst, IL · Google review
Recent work
Downers Grove, IL
Window replacement for Downers Grove homes
Downers Grove has a real mix: older homes near downtown, postwar ranches and split-levels, and newer houses built where older ones stood. Whatever you have, we custom-make each window to its opening, match the style of the house, and give you one written price.
- Older and newer homes alike
- Style matched to your house
- One written price
Why Illumination
How we work vs. what's typical.
Features
The Illumination Way
What's typical
Estimate
IlluminationNo hidden charges, ever. What you sign is what you pay.
TypicalQuotes that creep up once work starts.
Coverage
IlluminationGenuine lifetime warranty.
TypicalOne year of labor coverage. Then you're on your own.
Consultation
IlluminationNo pressure. No deception. Ever.
TypicalHigh-pressure sales.
Consultant
IlluminationAdvised by the owner himself. He oversees your project from start to finish. On the job, he's there supervising or lending a hand.
TypicalSalespeople who've often never installed a window, and who you'll never see again once you've paid.
Customization
IlluminationCustom sized to fit your home perfectly.
TypicalStock sizes with loose fits.
Installation
IlluminationA tight-knit team of expert carpenters.
TypicalThird-party subcontractors.
Customer service
IlluminationA call with the owner.
TypicalVoicemails and a 1-800 number.
Questions
Window replacement in Downers Grove: common questions
Can you match the windows in an older home?
Yes. Every window is custom-sized, and we can match grille patterns and proportions. Wood interiors are available if you want them to blend with original trim.
What does the $500 offer include?
You get $500 off your window replacement when you replace 4 or more windows. We'll confirm it in writing at your free consultation.
Do you offer financing?
Yes. Financing is available with no interest if paid in full in 21 months, subject to credit approval.
Ready for new windows in Downers Grove?
A free, no-pressure consultation at your home.
*$500 off with purchase of 4 or more windows.