Add Listing
    For Sale
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers

    5580 1st Avenue Stock Island, FL 33040

    View on Map
    Claim this Listing
    New
    For Sale
    $2,200,000

    Other Comrcl Style,Other Services,Professional Service,Boat Sales/Service,Auto Care

    Property size:
    25,000 SF
    Price / SF:
    $88/SF
    Added:
    May 4, 2026
    Days on Market:
    2
    Last Refresh:
    May 5 at 4:06 pm

    Property Features for 5580 1st Avenue

    General Information

    Property type
    Commercial Sale
    Property subtype
    Other
    Zoning
    MU - Mixed Use District
    Appliances
    None
    Standard status
    Active
    APN
    00125390-000000
    Size
    25,000 SF

    Taxes and HOA fees

    Tax Year
    2024
    Tax Annual Amount
    8626.06

    Building Details

    Year built
    1964
    Roof type
    Metal
    Architectural style
    Other

    We can help!

    Listing Contact
    Team Gardner/Langley

    Listing agent Team Gardner/Langley License #BK612006

    Listing office Berkshire Hathaway HomeServices Knight & Gardner Realty 336 Duval St., Key West, FL

    Listing date May 4, 2026

    MLS# 617638 Listing URL

    Copyright © 2026 Key West 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.

    Overview

    Stock Island Mixed-Use Opportunity

    This 25,000 SF mixed-use property is located on Stock Island and features dual access from 1st and 2nd Avenue. The site includes a 2,040 SF concrete office/utility building and expansive paved yard space. Zoned MU (Mixed Use District), the property supports a wide array of commercial, residential, and industrial uses. It is fully fenced with ample parking. This versatile parcel offers exceptional redevelopment potential and is located minutes from Key West. The property represents a large MU tract in a high-demand growth corridor. The property offers significant income opportunity with income already on the books, with potential to push it more.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Office buildings

    Map

    City
    Stock Island
    County
    Monroe
    State
    Florida
    Longitude
    -81.6849
    Latitude
    24.5796

    Nearby Similar for Sale

    • $9,499,000

      Waterfront Land with Mixed-Use Zoning

      Two parcels of land with mixed-use zoning and waterfront access.
      7000 5Th Street, Stock Island, FL 33040
      View Details
    • $1,950,000

      Stock Island Commercial Property Opportunity

      Prime commercial property with mixed-use zoning and income potential.
      5670 Laurel Avenue, Stock Island, FL 33040
      View Details
    • $2,300,000

      Mixed-Use Property with Development Potential

      Four parcels with commercial, residential units, and vacant land.
      5331 5Th Avenue, Stock Island, FL 33040
      View Details

    FAQs

    What type of property is this?
    Mixed-use property - 25,000 SF mixed-use property with redevelopment potential near Key West.
    Where is this mixed-use property located?
    The property is located at 5580 1st Avenue Stock Island, FL.
    What is the asking price?
    The asking price for this property is $2,200,000.
    What are key features of this property?
    This property features: Significant income opportunity with existing income.; Large 25,000 SF mixed‑use property.; Zoned MU, supporting diverse commercial, residential, and industrial uses.
    (305) 294-5155
    We can help!
    Listing Contact
    Team Gardner/Langley
    Real Estate License ID: BK612006
    Learn More
    Request Owner's contact information
    Message sent successfully
    Error
    If you are the owner or broker of this property and would like to edit or remove this listing please send a message to web site administrator.
    Message sent successfully
    Error
    Email to Your Friends
    Link copied to clipboard
    Separate multiple addresses with a comma
    Message sent successfully
    Error

    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
    Thanks! Your message was sent.
    Error! Your message wasn't sent.
    Please enter your name
    Please enter email
    Please enter the email in the correct format
    Please enter phone
    Please enter the number in the correct format
    Please enter message
    Thank You

    You are Unsubscribed From Notifications

    Thank You for Inquiry
    5580 1st Avenue, Stock Island, FL 33040
    letter with green check mark
    Check your email
    We sent you the
    agent's contact details. yellow underline
    Can't find it?
    Please check your junk/spam folder.
    Google sign-in failed. Please try again or use another login method.
    Sign Up Successful!
    You now have access to more from Realmo!