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$399,900
4 Days On Site

6640 S UNION Avenue
Chicago, IL 60621

For Sale|Multi Family|Active
9
Beds
3
Total Baths
1900
Built
County:
Cook
Listing Courtesy of MRED as distributed by MLS Grid of Blue Door Dave Inc
Call Now: 312-767-7744
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312-767-7744
6640 S UNION Avenue6640 S UNION Avenue6640 S UNION Avenue6640 S UNION Avenue
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Welcome to this beautifully renovated GREYSTONE 2-unit property offering incredible income potential and future upside. This oversized building features a massive duplex-down first unit with 5 bedrooms and 2 bathrooms, along with a spacious 4 bedroom, 1 bathroom second-floor unit-ideal for maximizing rental income. The property has been thoughtfully updated with modern finishes throughout, making it truly turnkey for an investor or house hacker looking to generate strong cash flow from day one. What sets this property apart is the significant value-add opportunity: the expansive lower level provides the potential to be converted into an additional unit, allowing a buyer to create a 3-unit building and substantially increase rental income. With the right vision, this property can easily produce $5,000+ per month in rental income. Perfect for: Investors seeking strong returns House hackers looking to cover their mortgage Buyers looking for a property with forced appreciation potential Conveniently located with access to public transportation, major roadways, and neighborhood amenities. Don't miss this rare opportunity to own a high-upside asset with immediate income and future scalability.

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Listing Snapshot
Price 
$399,900
Days On Site 
4 Days
Bedrooms 
9
Inside Area (SqFt) 
N/A
Total Baths 
3
Full Baths 
N/A
Partial Baths 
N/A
Lot Size 
N/A
Year Built 
1900
MLS® Number 
12614323
Status 
Active
Property Tax 
N/A
HOA/Condo/Coop Fees 
N/A
Sq Ft Source 
N/A
Friends & Family
Recent Activity
3 days agoListing updated with changes from the MLS®
5 days agoListing first seen on site
General Features
Parking Spaces 
2
Property Sub Type 
Multi Family
Sewer 
Public Sewer
Interior Features
Basement 
FinishedFull
Heating 
Natural Gas
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Exterior Features
Construction Details 
Brick
Community Features
MLS Area 
CHI - Englewood
School District 
299
Township 
Lake
Schools
School District
299
Elementary School
Unknown
Middle School
Unknown
High School
Unknown
Listing Courtesy of MRED as distributed by MLS Grid of Blue Door Dave Inc



Based on information submitted to the MLS GRID as of 2026-04-14 07:35 AM UTC. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.
Last checked: 2026-04-14 07:35 AM UTC
MRED DMCA Copyright Information Copyright © 2026 Midwest Real Estate Data LLC. All rights reserved.

Neighborhood & Commute
Source: Walkscore
Disclosure: Community information and market data powered by Constellation Data Labs. Information is deemed reliable but not guaranteed.
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