Brick Duplex with Central
For Sale
$375,000
3552 OLD PORT ISABEL RD., Brownsville, TX 78526
Residential Income, BROWNSVILLE, TX
Property Size4,064 SF
Lot Size0.25 Acres
Price / SF$92.27
Days on Market32
Property Features for 3552 OLD PORT ISABEL RD.
General Information
Property type
Residential Multi Family
Property subtype
Other
Patio and Porch features
Patio
Interior features
Cable TV, Ceiling Fan(s), Smoke Alarm(s)
Exterior features
Patio
Fencing
Privacy
Subdivision
EL JARDIN SDBV
Lot features
Curb & Gutter
Elementary school
PENA
Middle school
GARCIA
High school
RIVERA
Elementary school district
BROWNSVILLE I.S.D.
Middle school district
BROWNSVILLE I.S.D.
High school district
BROWNSVILLE I.S.D.
Standard status
Active
Size
4,064 SF
Lot size
0.25 Acres
Utilities
Sewer type
Public Sewer
Heating system
Central
Cooling system
Central Air
Water source
Public
Amenities
central heating and air conditioning
Building Details
Year built
2021
Floors in Building
1
Number of units
2
Flooring type
Tile
Listing Agency:
KELLER WILLIAMS LRGV · Keller Williams Realty
(956) 423-8877
Listed By:
MICHAEL HERNANDEZ · License #TREC#0799691
(956) 200-7732
Added: Jul 29
Changed: Aug 19
Last Checked: Aug 29 at 2:06PM
MLS# 29778320
Copyright © 2026 Rio Grande Valley Multiple Listing Service Inc. 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 2021, this duplex contains 4,064 square feet on a 0.254-acre parcel in Brownsville. The property has a brick veneer exterior, tile flooring, central heating and central air conditioning, and a practical residential layout. Interior features include ceiling fans, cable TV, and smoke alarms, while each unit benefits from patio space and privacy fencing. Appliances shown in the listing convey with the property, and some photography has been virtually staged.
Located at 3552 Old Port Isabel Rd., the property offers access to shopping, dining, schools, and major roadways. Brownsville amenities are nearby, and South Padre Island is within driving distance. The property is approximately 35–40 minutes from SpaceX Starbase.
Located at 3552 Old Port Isabel Rd., the property offers access to shopping, dining, schools, and major roadways. Brownsville amenities are nearby, and South Padre Island is within driving distance. The property is approximately 35–40 minutes from SpaceX Starbase.
Key Highlights
- 2021 construction with brick veneer exterior
- 4,064 square feet on 0.254 acres
- Central heating and central air conditioning
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
$33,529
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
8.94%
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%
$670,580
$670.6K
Cap Rate 7%
$478,986
$479.0K
Cap Rate 9%
$372,544
$372.5K
Market Conditions
NOI Build-Up for 4,064 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
$51.2K $12.60/SF
− Vacancy
−$3.3K −$0.81/SF
EGI
$47.9K $11.79/SF
− OpEx
−$14.4K −$3.54/SF
NOI
$33.5K $8.25/SF
Area
Brownsville, TX
Vacancy
6.46%
Lease Rate
$12.60 /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%
$670,580
Cap Rate 7%
$478,986
Cap Rate 9%
$372,544
Alternative Uses
Best Use
Multifamily LT 5
$479.0K
$419.1K – $558.8K
NOI $33,529 @ 7.0% cap · market cap 8.94%
Second Best
Apartment 5plus
$439.3K
$384.4K – $512.5K
NOI $30,748 @ 7.0% cap · market cap 8.20%
Theoretical Best
Healthcare Medical
$699.8K
$612.3K – $816.4K
NOI $48,983 @ 7.0% cap · market cap 13.06%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Lease Details
2
Residential units
Yes
Paved road access
Location Intelligence
Trade Area within ½ mile
69
Businesses Nearby
Explore this area
Business Placement
Demographics for 78526, TX
55,164
Population
18,222
Households
3
Avg Household Size
32
Median Age
29%
College-Educated
79%
High-School Grad
47.4 sq mi
ZIP Area
1,164
Density / Sq Mi
$68,143
Median Household Income
$36,451
Median Earnings
$1,080
Median Rent
$158,300
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 - Two-unit income property with tile flooring, patios, privacy fencing, and public water and sewer service.
Where is this duplex located?
The property is located at 3552 OLD PORT ISABEL RD. Brownsville, TX.
What is the asking price?
The asking price for this property is $375,000.
What are key features of this property?
This property features: 2021 construction with brick veneer exterior; 4,064 square feet on 0.254 acres; Central heating and central air conditioning
