Duplex with Two Leased
New
For Sale
$315,000
521/523 Southtrail Drive, San Antonio, TX 78216
MULTI_FAMILY - San Antonio, TX
Property Size1,793 SF
Lot Size0.17 Acres
Price / SF$175.68
Days on Market3
Property Features for 521/523 Southtrail Drive
General Information
Property type
Residential Multi Family
Property subtype
Other
Zoning
RM-4
Elementary school
Call District
Middle school
Call District
High school
Call District
Subdivision
0600
Standard status
Active
Size
1,793 SF
Lot size
0.17 Acres
Taxes and HOA fees
Tax Annual Amount
5555
Utilities
Cooling system
Central Air
Building Details
Year built
1968
Listing Agency:
Sophus Properties, LLC
(210) 850-2833
Listed By:
Donna Crabtree · License #512451
(210) 850-2833
Added: Jul 30
Changed: Aug 1
Last Checked: Aug 1 at 5:06PM
MLS# 1942351
Copyright © 2026 LERA MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Investment Insights
Based on property information with market context.
Duplex at 521/523 Southtrail Drive in San Antonio, TX 78216, zoned RM-4. The property sits on a 0.174-acre lot and was built in 1968. Total building area is 1,793 SF, and the property has central air.
The duplex is presented with both units currently leased, supporting immediate rental occupancy with an established tenant base. This configuration may appeal to buyers seeking a duplex that can be operated as an income-producing residential investment from day one.
The property may benefit from cosmetic updates, providing a straightforward path for owners looking to refresh finishes while maintaining the existing leased setup.
The duplex is presented with both units currently leased, supporting immediate rental occupancy with an established tenant base. This configuration may appeal to buyers seeking a duplex that can be operated as an income-producing residential investment from day one.
The property may benefit from cosmetic updates, providing a straightforward path for owners looking to refresh finishes while maintaining the existing leased setup.
Key Highlights
- Both units currently leased for immediate rental occupancy
- RM‑4 zoning
- 0.174‑acre lot
Financial Insights For Multifamily LT 5
Simulate Cap Rate and NOI
NOI Build-Up
- Vacancy
- income lost from leasable area expected to sit empty during the year — subtracted from gross rent.
- EGI (Effective Gross Income)
- gross rent minus vacancy losses — the realistic income before paying operating costs.
- OpEx (Operating Expenses)
- recurring costs to operate the property (property tax, insurance, utilities, maintenance, management) — excludes financing and capital improvements.
- NOI (Net Operating Income)
- income a property generates after operating costs but before financing and taxes.
| Component | $ | $/SF |
|---|---|---|
| Gross rent | $31.2k | $17.40 |
| − Vacancy | −$1.7k | −$0.96 |
| EGI | $29.5k | $16.44 |
| − OpEx | −$8.8k | −$4.93 |
| NOI | $20.6k | $11.51 |
1,793 SF · lease $17.40/SF/yr · vacancy 5.50% · expense 30.00%
Alternative Uses
Best Use
Multifamily LT 5
$294.8K
$258.0K – $344.0K
NOI $20,638 @ 7.0% cap · market cap 6.55%
Second Best
Apartment 5plus
$261.6K
$228.9K – $305.3K
NOI $18,315 @ 7.0% cap · market cap 5.81%
Theoretical Best
Office A
$457.4K
$400.2K – $533.6K
NOI $32,015 @ 7.0% cap · market cap 10.16%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Lease Details
100%
Occupancy
Multi-tenant
Tenancy
Location Intelligence
Trade Area within ½ mile
1,699
Businesses Nearby
Explore this area
Business Placement
Demographics for 78216, TX
40,172
Population
22,138
Households
1.8
Avg Household Size
37
Median Age
34%
College-Educated
90%
High-School Grad
14.1 sq mi
ZIP Area
2,849
Density / Sq Mi
$55,488
Median Household Income
$38,591
Median Earnings
$1,211
Median Rent
$281,700
Median Home Value
Market
Vacancy Rate% for Multifamily in South region
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.
Frequently Asked Questions
What type of property is this?
Duplex - Duplex on RM-4 zoned lot with central air and two currently leased units.
Where is this duplex located?
The property is located at 521/523 Southtrail Drive San Antonio, TX.
What is the asking price?
The asking price for this property is $315,000.
What are key features of this property?
This property features: Both units currently leased for immediate rental occupancy; RM‑4 zoning; 0.174‑acre lot
