San Antonio Duplex Investment
521/523 Southtrail Drive San Antonio, TX 78216
521/523 Southtrail Drive, San Antonio, TX, 78216
$315,000
For Sale
Under Contract
$315,000
MULTI_FAMILY - San Antonio, TX
Property Size1,793 SF
Lot Size0.17 Acres
Price / SF$175.68
Days on Market50
Property Features for 521/523 Southtrail Drive
General Information
- Property type
- Residential Multi Family
- Property subtype
- Other
- Zoning
- RM-4
- Standard status
- Active Under Contract
- 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: Jun 2 Checked: Jul 21 at 7:06AM
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.
This duplex in San Antonio, Texas, presents a prime investment opportunity in an exceptional location. The property, situated on a 0.174-acre lot, includes two units that are currently leased, providing immediate rental income from an established tenant base. The property offers an excellent value-add opportunity for investors looking to enhance returns through strategic improvements. The building has 1793 square feet of living space and is zoned RM-4. The owner is offering financing with favorable terms, creating a flexible and attractive path to ownership.
Key Highlights
- Immediate rental income from existing tenants.
- Owner financing with favorable terms available.
- Excellent value‑add opportunity through cosmetic updates.
Local 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 local authorities.
Property Analytics
Property Profile
Location Intelligence
Current Use by Public Records
Duplexes
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FAQs
What type of property is this?
Duplex - Duplex in prime location with immediate rental income potential.
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: Immediate rental income from existing tenants.; Owner financing with favorable terms available.; Excellent value‑add opportunity through cosmetic updates.
