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    The Largest CRE Database in the US with Over 1 Million Listings
    Property profile & analytics

    139 Prospect Ave Mamaroneck, NY 10543-5710

    • Investment properties
    • 2,696 SF
    • 0.11 lot acres
    OFF-MARKET
    Value Estimations
    $290,000
    Show details
    Cap Rate Potential
    Location Intelligence
    Property ID
    US63-1940924
    The Realmo ID is a unique identifier assigned to every property, incorporating country codes and precise geo-coordinates for 300x300-foot land blocks. It enables standardized data collection and seamless integration of disparate sources such as ownership, tax, title data and physical specifications. By aggregating current and historical records, the Realmo ID powers advanced analytics and delivers deep, verifiable insights for real estate professionals.

    Current Use by Public Records

    • Investment properties

    Property Details for 139 Prospect Ave

    Year built
    1930
    Lot size
    0.11 lot acres
    Property size
    2,696 SF
    Zone code
    C2
    Property type
    Investment properties
    Property subtype
    Live-work space
    APN
    553203 9-12-157
    APU
    553203912157

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      ML approach
      $340,000

    • Comparable approach

      Method
      Estimation
      AI Estimate
      $241,000
      Market price range: $161k - $472k

    Get a detailed, property-specific valuation — fast and free

    Location Insight

    • Map
    • Local Demand
    City
    Mamaroneck
    County
    Westchester
    State
    New York
    Longitude
    -73.7326
    Latitude
    40.9499
    CBSA code
    35620
    CBSA name
    NEW YORK-NORTHERN NEW JERSEY-LONG ISLAND, NY-NJ-PA METROPOLITAN STATISTICAL AREA

    Property Tax & Assessments

    Tax date
    Tax Amount
    Assessed Land Value
    Assessed Improvement Value
    Total Assessed Value
    Applied Tax Rate
    Land Market Value
    Improvement Market Value
    Total Market Value
    2020
    $0.00
    $390,000
    $110,000
    $500,000
    -
    $390,000
    $110,000
    $500,000

    Comparable in this City

    • Value Estimation
      $445,000
      6,188 SF

      729 Old White Plns Rd

      OFFICE/RESIDENTIAL (MIXED USE) • 6,188 SF
      729 Old White Plns Rd, Mamaroneck, NY 10543-1823
      View Details
    • Value Estimation
      $375,000
      4,760 SF

      114 Boston Post Rd

      OFFICE/RESIDENTIAL (MIXED USE) • 4,760 SF
      114 Boston Post Rd, Mamaroneck, NY 10543-3604
      View Details
    • Value Estimation
      $340,000
      5,700 SF

      218 Boston Post Rd, Unit 30

      OFFICE/RESIDENTIAL (MIXED USE) • 5,700 SF
      218 Boston Post Rd, Mamaroneck, NY 10543-3552
      View Details
    • Value Estimation
      $410,000
      4,680 SF

      138 Boston Post Rd, Unit 40

      OFFICE/RESIDENTIAL (MIXED USE) • 4,680 SF
      138 Boston Post Rd, Mamaroneck, NY 10543-3606
      View Details
    • Value Estimation
      $390,000
      3,044 SF

      115 Halstead Ave

      OFFICE/RESIDENTIAL (MIXED USE) • 3,044 SF
      115 Halstead Ave, Mamaroneck, NY 10543
      View Details
    • Value Estimation
      $350,000
      5,100 SF

      217 Halstead Ave

      OFFICE/RESIDENTIAL (MIXED USE) • 5,100 SF
      217 Halstead Ave, Mamaroneck, NY 10543-2621
      View Details

    Similar Nearby for Sale

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      Mamaroneck Warehouse: Prime Location

      10,125 SF Warehouse, M-1 Zoning
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      Mamaroneck Warehouse - $695K

      Downtown Mamaroneck warehouse, ideal for workshop or storage.
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    • $1,900,000
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      Mamaroneck Retail Investment Opportunity

      High-yield retail building, development potential.
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    • $1,750,000
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      Mamaroneck Ave Multifamily Investment

      6-Unit Apartment Building, High NOI
      658 Mamaroneck Ave, Mamaroneck, NY 10543
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    • $369,000

      Two Bedroom Apartment with Patio

      Two-bedroom apartment with private entrance and patio near amenities.
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      Top-level apartment near trains and parks.
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    Similar Nearby for Lease

    • $30 SF/Yr
      1,345 SF

      Mamaroneck Office Space Available

      Professional office space with on-site management and great natural light.
      141 Halstead Ave, Mamaroneck, NY 10543
      View Details
    • $1,500 /Mo
      1,500 SF

      Versatile Space in Mamaroneck, NY

      Adaptable space suitable for retail, office, studio, or trades.
      820 Mamaroneck Ave, Mamaroneck, NY 10543
      View Details
    • $34 SF/Yr
      900 SF

      Retail Space on Boston Post

      Retail space available for lease on Boston Post Road.
      803-809 W Boston Post Rd, Mamaroneck, NY 10543
      View Details
    • Contact for pricing
      2,995 SF

      Retail Space in Mamaroneck

      Retail space with on-site parking near established businesses.
      1030 W Boston Post Rd, Mamaroneck, NY 10543
      View Details
    • $3,450 /Mo

      Modern Office Space with Patio

      Modern office space with natural light, kitchen, and patio.
      555 E Boston Post Rd, Mamaroneck, NY 10543
      View Details
    • $42 SF/Yr
      1,750 SF

      Mamaroneck Retail Space For Lease

      Prime retail space available on East Boston Post Road.
      615 East Boston Post Rd, Mamaroneck, NY 10543
      View Details
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    139 Prospect Ave
    Mamaroneck, NY 10543-5710
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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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