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    Port Isabel 5-Plex Investment Opportunity Title is generated by Realmo AI

    510 S Musina, Port Isabel, TX 78578

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    For Sale
    $499,900

    MULTI_FAMILY - Port Isabel, TX

    Property size:
    2,645 SF
    Lot size:
    0.28 Acres
    Price / SF:
    $188/SF
    Added:
    Sep 3, 2025
    Days on Market:
    263
    Last Refresh:
    May 23 at 7:06 pm

    Property Features for 510 S Musina

    General Information

    Property type
    Residential Multi Family
    Property subtype
    Other
    Zoning
    MF
    Bedrooms
    4
    Bathrooms
    7
    Rooms
    Bathroom 3, Bathroom 4, Bathroom 2, Bathroom 7, Bedroom 3, Bathroom 1, Bedroom 1, Bathroom 6, Bedroom 2, Bathroom 5, Bedroom 4
    Parking features
    Garage - Attached
    Interior features
    Ceiling Fan(s), Smoke Detector, Washer/Dryer Hook-up
    Exterior features
    Private Yard
    Appliances
    Microwave, Oven-Single, Refrigerator, Stove, Washer/Dryer
    Standard status
    Active
    Size
    2,645 SF
    Lot size
    0.28 Acres

    Taxes and HOA fees

    Tax Year
    2024
    Tax Annual Amount
    2793

    Building Details

    Year built
    1968
    Floors in Building
    1
    Number of units
    5
    Flooring type
    Tile
    Building materials
    Frame
    Roof type
    Composition

    We can help!

    Listing Contact
    Lisa Capistran

    Listing agent Lisa Capistran License #0627356

    Listing office SPI Beachfront Realty 13 Laguna Madre Dr., Laguna Vista, TX

    Listing date Sep 3, 2025

    MLS# 104242 Listing URL

    Copyright © 2026 South Padre Island Board 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.

    HighLights

    • Fully occupied 5‑plex generating $4,777 monthly rental income
    • Prime location in Port Isabel across from the city park
    • Only a 5‑minute drive to South Padre Island beaches
    • Includes a main residence with 3 bedrooms, 2.5 baths, and a 2‑car garage
    • Features three studio efficiencies, each with a private bath
    • Includes a separate 1‑bedroom, 1‑bath apartment

    Overview

    This fully occupied 5-plex presents an investment opportunity in Port Isabel, situated on two corner lots. The property is located across from the city park and a short drive from the beaches of South Padre Island. The main residence includes 3 bedrooms, 2.5 baths, and a 2-car garage. In addition to the main residence, the property features three studio efficiencies, each with a private bath, and a 1-bedroom, 1-bath apartment. The property generates $4,777 per month in rental income. The property size is 2,645 square feet on a 0.2755-acre lot.
    Property Profile Location Intelligence

    Current Use by Public Records

    Apartment buildings

    Suggested Use

    Real Estate Agency Law Firm Restaurant Spa & Massage Center Dental Office Hair Salon Nail Salon Building Supply Pharmacy Auto Repair Shop

    Zoning and permitted uses should be independently verified with local authorities.

    Location Insight

    • Map
    • Local Demand
    City
    Port Isabel
    County
    Cameron
    State
    Texas
    Longitude
    -97.2080018
    Latitude
    26.0721806

    Nearby Similar for Sale

    • $1,500,000
      2,384 SF

      Highway 100 Commercial Opportunity

      Turnkey business opportunity on highly sought after Highway 100.
      321 Highway 100, Port Isabel, TX 78578
      View Details
    • $9,000,000
      25,257 SF

      Waterfront Multi-Use Income Property

      Income-producing asset with diversified revenue streams and development potential.
      418 W Highway 100, Port Isabel, TX 78578
      View Details

    FAQs

    What type of property is this?
    Apartment building - Fully occupied 5-unit property near South Padre Island beaches.
    Where is this apartment building located?
    The property is located at 510 S Musina Port Isabel, TX.
    What is the asking price?
    The asking price for this property is $499,900.
    What are key features of this property?
    This property features: Fully occupied 5‑plex generating $4,777 monthly rental income; Prime location in Port Isabel across from the city park; Only a 5‑minute drive to South Padre Island beaches
    (956) 533-0405
    We can help!
    Listing Contact
    Lisa Capistran
    Real Estate License ID: 0627356
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    Realmo Value Estimations

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.
    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.
    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Realmo CapRate Calculation

    Realmo calculates the Capitalization Rate (Cap Rate) to help estimate a property's potential return on investment. The Cap Rate is a fundamental metric in commercial real estate that measures the relationship between a property's net operating income and its market value.

    How We Calculate Cap Rate

    Cap Rate Formula:
    Cap Rate (%) = (Net Operating Income / Property Value) × 100

    Net Operating Income (NOI) Formula:
    NOI = Area × Lease Rate × (1 - Vacancy Rate) × (1 - Operating Expense Ratio)

    Components

    Net Operating Income (NOI) represents the annual income a property generates after operating expenses:

    • Area: Building square footage from property records
    • Lease Rate: Annual $/sqft based on market data for the property type and geographic location
    • Vacancy Rate: Percentage of unoccupied space based on market data for the property type and location
    • Operating Expense Ratio: Operating costs as a percentage of income, varies by property type

    Property Value is derived from:

    • Recent sale price (if available)
    • Statistical models using comparable sales
    • AI-powered valuation estimates

    Example Calculation

    For a 100,000 sqft Office Building:

    • Lease Rate: $25.00/sqft/year (market data for Office in this area)
    • Vacancy Rate: 8% (market data for Office in this area)
    • Operating Expense Ratio: 35% (typical for Office properties)
    • Property Value: $15,000,000

    Step 1: Calculate NOI

    NOI = 100,000 × $25.00 × (1 - 0.08) × (1 - 0.35)
    NOI = 100,000 × $25.00 × 0.92 × 0.65
    NOI = $1,495,000/year

    Step 2: Calculate Cap Rate

    Cap Rate = ($1,495,000 / $15,000,000) × 100
    Cap Rate = 9.97%

    Property Type Considerations

    Net Operating Income calculations vary by property type due to different operating expense ratios:

    • Office: Higher expenses (30-40%) for HVAC, utilities, maintenance
    • Retail: Moderate expenses (25-35%) for common area maintenance
    • Industrial/Warehouse: Lower expenses (15-25%) for minimal tenant services
    • Multifamily: Moderate expenses (35-45%) including property management
    • Self-Storage: Lower expenses (25-35%) due to minimal maintenance

    Market lease rates and vacancy rates are specific to each property type and geographic location, reflecting local market conditions.

    Disclaimer

    These calculations are estimates for informational purposes only and should not be used as a substitute for professional financial analysis or appraisal.

    • Cap Rate calculations depend on market data that may change over time
    • Actual operating expenses, lease rates, and vacancy rates may differ from market averages
    • Individual property conditions, lease terms, and tenant quality significantly impact actual NOI
    • Property value estimates are approximations and not official appraisals
    • Cap rates vary widely by market, property condition, and investment risk profile

    Professional Guidance Recommended: Before making any investment or financial decisions, consult with licensed appraisers, commercial real estate brokers, and financial advisors who can evaluate your specific property and circumstances.
    By using this feature, you acknowledge that Realmo is not responsible for investment decisions or actions taken based on these estimates.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Stat Estimate

    This method estimates value based on actual market adjusted recent (~5 years) sales of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all similar sales ($/sqft) are above this value
    • Range-to: 75% of all similar sales ($/sqft) are below this value
    AI Estimate

    This method estimates value based on AI market estimation of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all estimations ($/sqft) are above this value
    • Range-to: 75% of all estimations ($/sqft) are below this value
    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

    More about this property
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