Duplex with Mirror-Image Floor
New
For Sale
$439,000
6815 JOHN MARSHALL ST, San Antonio, TX 78240
Multi-Family (2-8 Units), San Antonio, TX
Property Size3,009 SF
Lot Size0.28 Acres
Price / SF$145.90
Days on Market6
Property Features for 6815 JOHN MARSHALL ST
General Information
Property type
Residential Multi Family
Property subtype
Other
Elementary school
Leon Valley
Middle school
Rudder
High school
Marshall
Elementary school district
Northside
Middle school district
Northside
High school district
Northside
Subdivision
0400
Standard status
Active
Size
3,009 SF
Lot size
0.28 Acres
Taxes and HOA fees
Tax Annual Amount
9546
Utilities
Cooling system
Central Air
Amenities
covered patios
decks
Building Details
Year built
2007
Listing Agency:
First Texan Realty Group LLC
(210) 542-2323
Listed By:
Michelle Anthis
(210) 298-7653
Added: Sep 11
Changed: Sep 12
Last Checked: Sep 16 at 3:06AM
MLS# 2015958
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.
Built in 2007, this duplex contains 3,009 square feet of combined living area on a 0.284-acre lot. The two residences use mirror-image layouts, with three bedrooms and 2.5 baths per side. Each unit also includes a one-car garage, extended driveway, central air, and covered patios or decks. The configuration provides separate living spaces with consistent features throughout.
Located at 6815 John Marshall St in San Antonio, TX 78240, the property includes outdoor area suitable for gardening, pets, entertaining, or general recreation. The paired floor plans and shared lot create a straightforward two-unit residential income property with more than 1,500 square feet of living space per residence.
Located at 6815 John Marshall St in San Antonio, TX 78240, the property includes outdoor area suitable for gardening, pets, entertaining, or general recreation. The paired floor plans and shared lot create a straightforward two-unit residential income property with more than 1,500 square feet of living space per residence.
Key Highlights
- Two‑unit duplex with mirror‑image floor plans
- 3,009 square feet of combined living area
- Each unit includes 3 bedrooms and 2.5 baths
Financial Insights
Estimated NOI and Cap Rate
NOI = area × lease_rate × (100 − vacancy) / 100 × (1 − expense_ratio). Net Operating Income — what the owner takes home each year before mortgage payments and income tax. Effective rent (asking rent minus vacancy losses) minus operating costs (taxes, insurance, maintenance, management).
NOI / Yr
$34,634
Cap rate = NOI / list price × 100. Capitalization rate — annual return on a fully cash purchase, before financing. NOI divided by price. Higher means more income per dollar invested, but usually also more risk or older condition. 5–8% is typical for stabilized commercial property; double digits often signal distressed deals.
Cap Rate
7.89%
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$692,680
$692.7K
Cap Rate 7%
$494,771
$494.8K
Cap Rate 9%
$384,822
$384.8K
Market Conditions
NOI Build-Up for 3,009 SF
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.
Gross rent
$52.4K $17.40/SF
− Vacancy
−$2.9K −$0.96/SF
EGI
$49.5K $16.44/SF
− OpEx
−$14.8K −$4.93/SF
NOI
$34.6K $11.51/SF
Area
San Antonio, TX
Vacancy
5.50%
Lease Rate
$17.40 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$692,680
Cap Rate 7%
$494,771
Cap Rate 9%
$384,822
Alternative Uses
Best Use
Multifamily LT 5
$494.8K
$432.9K – $577.2K
NOI $34,634 @ 7.0% cap · market cap 7.89%
Second Best
Apartment 5plus
$439.1K
$384.2K – $512.3K
NOI $30,736 @ 7.0% cap · market cap 7.00%
Theoretical Best
Office A
$767.5K
$671.6K – $895.5K
NOI $53,728 @ 7.0% cap · market cap 12.24%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
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Current Use
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
621
Businesses Nearby
Explore this area
Business Placement
Demographics for 78240, TX
56,112
Population
27,713
Households
2
Avg Household Size
35
Median Age
38%
College-Educated
93%
High-School Grad
11.2 sq mi
ZIP Area
5,010
Density / Sq Mi
$62,203
Median Household Income
$41,812
Median Earnings
$1,283
Median Rent
$245,100
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 South region
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Frequently Asked Questions
What type of property is this?
Duplex - Each residence includes a garage, extended driveway, central air, and covered outdoor living space.
Where is this duplex located?
The property is located at 6815 JOHN MARSHALL ST San Antonio, TX.
What is the asking price?
The asking price for this property is $439,000.
What are key features of this property?
This property features: Two‑unit duplex with mirror‑image floor plans; 3,009 square feet of combined living area; Each unit includes 3 bedrooms and 2.5 baths
