Keller Williams · Chicagoland
Your Bartlett & Western Suburbs Real Estate Expert
From Avondale to Bartlett — 200+ homes sold, $80M+ in lifetime volume, 183 five-star reviews. Sergio knows every block, every market, every opportunity.
For Buyers
Find Your Perfect Home
Navigating the Chicagoland market takes local expertise. Sergio guides you from first showing to closing day — with zero pressure and total transparency.
- Access to off-market and pre-list properties
- Expert negotiation to win in competitive markets
- Trusted network of lenders, inspectors & attorneys
- Step-by-step guidance for first-time buyers
For Sellers
Sell Smarter, Net More
Sergio's proven marketing system gets your home in front of the right buyers fast — and his negotiation skills keep more money in your pocket.
- Free, accurate home valuation with no obligation
- Professional photography & staging consultation
- Maximum exposure across MLS, Zillow & social
- Average 14 days on market — well below area average
Explore Neighborhoods
Know Your Market
Sergio specializes in Chicagoland's most sought-after communities — from vibrant city neighborhoods to thriving suburbs.
Chicago
Avondale
Median Price
$420K
Chicago
Wicker Park
Median Price
$620K
Chicago
Lakeview
Median Price
$540K
Suburb
Naperville
Median Price
$490K
North Shore
Evanston
Median Price
$560K
West Suburb
Oak Park
Median Price
$420K
Why Sergio
Results That Speak for Themselves
Sergio Zgrzebski has spent 14+ years mastering the Chicagoland resale market. As an ABR® and SRS®-certified Keller Williams agent, he combines deep neighborhood knowledge with world-class systems to deliver exceptional results — whether you're a first-time buyer, relocating from out of state, or growing an investment portfolio.
Client Stories
What Clients Are Saying
Sergio found us our dream home in Avondale in under three weeks. His knowledge of the neighborhood and his negotiation skills saved us $40,000 off the asking price. We couldn't be happier.
We listed with Sergio after a bad experience with another agent. He had our Naperville home under contract in 9 days — $25,000 over asking. His marketing system is unlike anything I've seen.
As a first-time buyer, I was terrified. Sergio walked me through every single step with patience and expertise. I closed on my Wicker Park condo feeling completely confident. He's the best.
Recent closings
Just Sold
Real results for real clients — homes sold fast, often over asking price.
$485,000
412 Hillside Ave
Glen Ellyn, IL
$362,500
1823 Maple St
Bartlett, IL
$610,000
5540 N Leavitt St
Chicago, IL
$529,000
2201 Briarwood Dr
Naperville, IL
$398,000
738 Kenilworth Ave
Glen Ellyn, IL
$285,000
3310 Oak Ave
Berwyn, IL
$447,000
901 S Elmhurst Rd
Bloomingdale, IL
$555,000
4422 W Diversey Ave
Chicago, IL
Client reviews
183 Five-Star Reviews
Don't take our word for it — hear directly from Sergio's clients.
Sergio sold our Glen Ellyn home in 6 days — over asking price. His market knowledge and negotiation skills are unmatched. We couldn't be happier with the outcome.
Magda & Tom K.
August 2024
As first-time buyers, we were nervous about the process. Sergio walked us through every step with patience and expertise. We found our dream home in Naperville within 3 weeks.
James & Lisa R.
June 2024
Sold my investment property in Avondale for $40K over asking. Sergio's staging advice and pricing strategy were spot on. Professional, responsive, and results-driven.
Robert M.
March 2024
Sergio helped us navigate a complex relocation from out of state. His knowledge of the western suburbs was invaluable — we found the perfect home in Bartlett on our first trip.
Karolina W.
January 2024
We interviewed 4 agents before choosing Sergio. Best decision we made. He sold our home in 4 days with multiple offers. His communication throughout was excellent.
David & Sarah T.
October 2023
Being new to the current housing market, we needed an experienced realtor to guide us. From the beginning, Sergiusz was extremely helpful, knowledgeable and patient with us.
Alicja Styrczula
May 2023
We could not have been happier working with Sergiusz. He was truly exceptional! Very impressed with his level of knowledge of real estate and professionalism.
Anna & Andrew P.
April 2023
He's the best realtor. Thank you so much for your help and friendship and selling my house.
Yecenia Vazquez
July 2023
I'm extremely satisfied with the whole process of getting my new home. SERGIO is outstanding and his work proves it — if you're looking for a highly knowledgeable and hard working agent, he is your guy!
Kate Grela
May 2022
Build Smart Chicago
Looking for brand-new construction in Chicagoland? Sergio's sister brand specializes in new builds — from custom homes to development projects across DuPage County and the Northwest Side.
- New construction homes
- Custom build consulting
- Developer partnerships
Ready to Make Your Move?
Whether you're buying or selling, Sergio is ready to put his Chicagoland expertise to work for you.