4-Unit Quadplex with Private
New
For Sale
$535,000
509 N Onyx Avenue, Edinburg, TX 78541
Residential Income, Edinburg, TX
Property Size4,264 SF
Lot Size0.23 Acres
Price / SF$125.47
Days on Market6
Property Features for 509 N Onyx Avenue
General Information
Property type
Residential Multi Family
Property subtype
Quadruplex
Property condition
Under Construction
Parking
8
Exterior features
Sprinkler System
Appliances
Electric Water Heater, Water Heater (Laundry Room), Refrigerator, Stove/Range-Electric Smooth
Subdivision
Gem Estates
Lot features
Curb & Gutters, Professional Landscaping, Sidewalks, Sprinkler System
Elementary school
Cavazos
Middle school
Longoria
High school
Edinburg North H.S.
Elementary school district
Edinburg ISD
Middle school district
Edinburg ISD
High school district
Edinburg ISD
Directions
Head north on Mccoll, Turn left on W Schunior st, Turn left on Emerald Ave, Turn left on to Amethyst St, Turn Right onto Onyx, Building is on the Right hand side
Standard status
Active
APN
G291000000004200
Size
4,264 SF
Lot size
0.23 Acres
Taxes and HOA fees
Tax Year
2026
Tax Annual Amount
3231
HOA Fee
$650 Annually
Utilities
Heating system
Central, Zoned
Cooling system
Zoned, Central Air
Water source
Public
Amenities
private patio
Building Details
Year built
2026
Floors in Building
1
Number of units
10
Building materials
Stucco
Roof type
Shingle
Listing Agency:
BIG Realty
(956) 465-0011
Listed By:
Omar Govea
(956) 929-2345
Added: Oct 20
Last Checked: Oct 25 at 1:06PM
MLS# 518253
Copyright © 2026 Greater McAllen Association of Realtors. 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 4-unit quadplex contains 4,264 square feet on a 0.2324-acre lot. Each residence is configured with 3 bedrooms and 2 bathrooms and includes a private patio. Kitchen appliances include a refrigerator and electric smooth-top stove/range; the property also has a sprinkler system.
Built in 2026, the building has stucco exterior construction, a shingle roof, and central, zoned heating and cooling. Public water serves the property. Nearby destinations identified include UTRGV, schools, hospitals, shopping centers, restaurants, and entertainment.
Built in 2026, the building has stucco exterior construction, a shingle roof, and central, zoned heating and cooling. Public water serves the property. Nearby destinations identified include UTRGV, schools, hospitals, shopping centers, restaurants, and entertainment.
Key Highlights
- Four residences, each with 3 bedrooms and 2 bathrooms
- 4,264‑square‑foot building on a 0.2324‑acre lot
- Private patio for each residence
Financial Insights
Estimated NOI and Cap Rate
NOI / Yr
$40,058
Cap Rate
7.49%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$801,160
$801.2K
Cap Rate 7%
$572,257
$572.3K
Cap Rate 9%
$445,089
$445.1K
Market Conditions
NOI Build-Up for 4,264 SF
Gross rent
$58.8K $13.80/SF
− Vacancy
−$1.6K −$0.38/SF
EGI
$57.2K $13.42/SF
− OpEx
−$17.2K −$4.03/SF
NOI
$40.1K $9.39/SF
Area
Edinburg, TX
Vacancy
2.75%
Lease Rate
$13.80 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap Rate 5%
$801,160
Cap Rate 7%
$572,257
Cap Rate 9%
$445,089
Alternative Uses
Best Use
Multifamily LT 5
$572.3K
$500.7K – $667.6K
NOI $40,058 @ 7.0% cap · market cap 7.49%
Second Best
Apartment 5plus
$511.4K
$447.5K – $596.6K
NOI $35,797 @ 7.0% cap · market cap 6.69%
Theoretical Best
Office A
$1.11M
$968.1K – $1.29M
NOI $77,448 @ 7.0% cap · market cap 14.48%
Zoning and permitted uses should be independently verified with authorities.
How Realmo checks its estimates
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Lease Details
4
Residential units
Location Intelligence
Trade Area within ½ mile
323
Businesses Nearby
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Business Placement
Demographics for 78541, TX
48,513
Population
17,669
Households
2.7
Avg Household Size
28
Median Age
25%
College-Educated
77%
High-School Grad
290.2 sq mi
ZIP Area
167
Density / Sq Mi
$50,567
Median Household Income
$30,752
Median Earnings
$945
Median Rent
$142,600
Median Home Value
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Market
Vacancy Rate% for Multifamily in South region
Frequently Asked Questions
What type of property is this?
Quadplex - Each residence includes three bedrooms, two bathrooms, kitchen appliances, and its own outdoor patio.
Where is this quadplex located?
The property is located at 509 N Onyx Avenue Edinburg, TX.
What is the asking price?
The asking price for this property is $535,000.
What are key features of this property?
This property features: Four residences, each with 3 bedrooms and 2 bathrooms; 4,264‑square‑foot building on a 0.2324‑acre lot; Private patio for each residence
