Duplex with Detached
New
For Sale
$189,900
8522-8524 Mathilda Avenue, Affton, MO 63123
Residential Income, Affton, MO
Property Size1,472 SF
Lot Size0.16 Acres
Price / SF$129.01
Days on Market5
Property Features for 8522-8524 Mathilda Avenue
General Information
Property type
Residential Multi Family
Property subtype
Single Family Residence
Rooms
Basement
Parking features
Garage, Driveway
Basement
Full
Subdivision
City View
Elementary school
Mesnier Primary School
Middle school
Rogers Middle
High school
Affton High
Elementary school district
Affton 101
Middle school district
Affton 101
High school district
Affton 101
Directions
GPS Friendly :-)
Standard status
Active
APN
25J-33-1036
Size
1,472 SF
Lot size
0.16 Acres
Additional Details
Tenant in Place
Yes
Taxes and HOA fees
Tax Year
2025
Tax Annual Amount
2600
Utilities
Heating system
Forced Air
Cooling system
Central Air
Water source
Public
Amenities
partially fenced backyard
Building Details
Year built
1950
Floors in Building
1
Number of units
2
Building materials
Vinyl Siding
Architectural style
Ranch
Buildings
1
Listing Agency:
EXP Realty, LLC
(866) 224-1761
Listed By:
Christoph Dewald · License #2020037702
(636) 232-1614
Added: Oct 26
Changed: Oct 27
Last Checked: Oct 30 at 5:06AM
MLS# 26062432
Copyright © 2026 Mid America Regional Information Systems, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
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Investment Insights
Based on property information with market context.
This 1950-built duplex contains two one-bedroom units, each with a living room and kitchen. The property totals 1,472 square feet on a 0.155-acre lot. A detached two-car garage and driveway provide parking, while the partially fenced backyard offers outdoor space. The building has vinyl siding, forced-air heat, central air conditioning, public water, and a basement.
At 8522-8524 Mathilda Avenue in Affton, one unit is occupied and the other is vacant. The layout, separate residences, and existing garage define the property’s core features.
At 8522-8524 Mathilda Avenue in Affton, one unit is occupied and the other is vacant. The layout, separate residences, and existing garage define the property’s core features.
Key Highlights
- Two one‑bedroom units; one is occupied and one is vacant
- 1,472 square feet on a 0.155‑acre lot
- Detached two‑car garage and driveway parking
Financial Insights
Estimated NOI and Cap Rate
NOI / Yr
$15,741
Cap Rate
8.29%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$314,820
$314.8K
Cap Rate 7%
$224,871
$224.9K
Cap Rate 9%
$174,900
$174.9K
Market Conditions
NOI Build-Up for 1,472 SF
Gross rent
$23.8K $16.20/SF
− Vacancy
−$1.4K −$0.92/SF
EGI
$22.5K $15.28/SF
− OpEx
−$6.7K −$4.58/SF
NOI
$15.7K $10.69/SF
Area
St. Louis County, MO
Vacancy
5.70%
Lease Rate
$16.20 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap Rate 5%
$314,820
Cap Rate 7%
$224,871
Cap Rate 9%
$174,900
Alternative Uses
Best Use
Multifamily LT 5
$224.9K
$196.8K – $262.4K
NOI $15,741 @ 7.0% cap · market cap 8.29%
Second Best
Apartment 5plus
$195.7K
$171.2K – $228.3K
NOI $13,698 @ 7.0% cap · market cap 7.21%
Theoretical Best
Office A
$315.9K
$276.4K – $368.6K
NOI $22,114 @ 7.0% cap · market cap 11.65%
Zoning and permitted uses should be independently verified with authorities.
How Realmo checks its estimates
Property Analytics
Who owns this building?
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Open Analytics
Lease Details
2
Residential units
Single-tenant
Tenancy
Location Intelligence
Trade Area within ½ mile
377
Businesses Nearby
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Business Placement
Demographics for 63123, MO
50,989
Population
23,208
Households
2.2
Avg Household Size
41
Median Age
36%
College-Educated
92%
High-School Grad
12.5 sq mi
ZIP Area
4,079
Density / Sq Mi
$74,187
Median Household Income
$43,458
Median Earnings
$987
Median Rent
$205,300
Median Home Value
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Cap Rate, Value Estimation, Potential NOI and more
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Market
Vacancy Rate% for Multifamily in Midwest region
Frequently Asked Questions
What type of property is this?
Duplex - Two one-bedroom residences share a partially fenced yard and a long driveway.
Where is this duplex located?
The property is located at 8522-8524 Mathilda Avenue Affton, MO.
What is the asking price?
The asking price for this property is $189,900.
What are key features of this property?
This property features: Two one‑bedroom units; one is occupied and one is vacant; 1,472 square feet on a 0.155‑acre lot; Detached two‑car garage and driveway parking
