“Awesome experience! Greg is very professional.Job was done fest, clean and very officiant in middle of cold weather. Strongly recommend this company to anyone. Thank you Greg.”
Barbara K.
Mount Prospect, IL · Google review
Window Replacement · Mount Prospect, IL
Claim $500 off your Mount Prospect window replacement.*
Owner-operated window replacement for Mount Prospect 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.
“Greg was super easy to work with and everything was really simple. John installed the windows and was polite and timely, he do a great job and I'm so happy to have windows that I can actually crack open a few inches now :) they look beautiful”
Lauren E.
Elgin, IL · Google review
“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
Recent work
Mount Prospect, IL
Window replacement for Mount Prospect homes
Many Mount Prospect homes were built from the 1950s through the '70s, and plenty still have original or first-generation replacement windows. We replace them with custom-made windows that seal tight and open easily, even in the middle of winter, as Barbara K. from Mount Prospect mentions in her review above.
- Postwar homes upgraded
- Installs done right, even in winter
- Written fixed-price quote
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 Mount Prospect: common questions
Have you worked in Mount Prospect?
Yes. Barbara K. from Mount Prospect left one of the reviews above. Her install was done in the middle of cold weather.
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 Mount Prospect?
A free, no-pressure consultation at your home.
*$500 off with purchase of 4 or more windows.