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

    40 Underhill Blvd Syosset, NY 11791-3490

    • Office buildings
    • 4,371 SF
    • 0.26 lot acres
    OFF-MARKET
    Last Sale
    Jan 22, 2025
    $2,100,000
    Value Estimations
    $2,010,000
    Show details
    Cap Rate Potential
    4.1%
    Office buildings
    Location Intelligence
    Property ID
    US63-3160316
    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

    • Rebecca Cohen, Licensed Associate Broker / Real Estate Agent
    • Commercial Contractors Corp. / General Contractor
    • Dr. Sun Math Chemistry Physics SAT AP Tutoring / Tutoring Service
    • Jeannemarie Massetti / Social Worker
    • Elite Dental Lab / Dental Laboratory

    Property Details for 40 Underhill Blvd

    Year built
    1964
    Construction
    MASONRY/CONCRETE MASONRY UNITS (CMUS)
    Lot size
    0.26 lot acres
    Property size
    4,371 SF
    Property type
    Office buildings
    APN
    15-013-00-0099
    APU
    15013000099

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      Statistic approach
      $1,940,000
      ML approach
      $1,905,000

    • CAP approach

      CAP Return
      Estimation
      6%
      $1,335,000
      6.5%
      $1,235,000
      7%
      $1,145,000

    • Alternative Use

      Use
      Estimation
      OFFICE BUILDING
      $3,085,000
      Current use
      AUTO REPAIR, GARAGE
      $2,875,000
      Change: -7% Conversion: Difficult
      COMMERCIAL (GENERAL)
      $2,830,000
      Change: -8% Conversion: Easy
      RETAIL STORES
      $2,490,000
      Change: -19% Conversion: Moderate

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

    Location Insight

    • Map
    • Local Demand
    City
    Syosset
    County
    Nassau
    State
    New York
    Longitude
    -73.5038
    Latitude
    40.8236
    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
    2023
    $100,165
    $13,655
    $1.00
    $13,656
    -
    $0.00
    $0.00
    $1,365,600

    Comparable in this City

    • Value Estimation by Request
      0.23 Acres

      6500 Jericho Tpke

      OFFICE BUILDING • 0.23 Acres
      6500 Jericho Tpke, Syosset, NY 11791-4489
      View Details
    • Value Estimation
      $5,720,000
      10,170 SF

      477 Jericho Tkpe

      OFFICE BUILDING • 10,170 SF
      477 Jericho Tkpe, Syosset, NY 11791
      View Details
    • Value Estimation
      $670,000
      2,464 SF

      4 Burke Ln

      PROFESSIONAL BUILDING (MULTI-STORY) • 2,464 SF
      4 Burke Ln, Syosset, NY 11791-3931
      View Details
    • Value Estimation
      $1,685,000
      2,634 SF

      99 Cold Spg Rd

      PROFESSIONAL BUILDING (MULTI-STORY) • 2,634 SF
      99 Cold Spg Rd, Syosset, NY 11791-3140
      View Details
    • Value Estimation
      $865,000
      1,360 SF

      317 Jackson Ave

      OFFICE BUILDING • 1,360 SF
      317 Jackson Ave, Syosset, NY 11791-4123
      View Details
    • Value Estimation
      $2,045,000
      3,060 SF

      175 Jericho Tpke

      PROFESSIONAL BUILDING (MULTI-STORY) • 3,060 SF
      175 Jericho Tpke, Syosset, NY 11791-4532
      View Details

    Similar Nearby for Sale

    • $800,000
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      Standalone Corner Office Building Syosset

      Two-story office building in downtown Syosset, easy commuter access.
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      Syosset Office/Medical Space For Sale

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    • $1,850,000
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      Muttontown Land: Build Dream Estate

      2.45-acre vacant parcel in gated community, approved plans.
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    • Contact for pricing
      14.56 Acres

      Syosset Commercial Land - 14.56 Acres

      14.56-acre commercial land, prime development potential.
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    Similar Nearby for Lease

    • $30 SF/Yr
      15,000 SF

      Syosset Office Space For Lease

      Prime Syosset location, immediate occupancy.
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    • $26 SF/Yr
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      Syosset Office/Industrial Space

      Prime Nassau County location, flexible suites available
      575 Underhill Blvd, Syosset, NY 11791
      View Details
    • Contact for pricing
      3,400 SF

      Office Space on Jericho Turnpike

      Office space with high ceilings and excellent exposure available for rent.
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    • $34 SF/Yr
      795 SF

      Office Space Available For Rent

      795 square feet of office space for lease.
      40 Underhill Blvd, Syosset, NY 11791
      View Details
    • $24 SF/Yr
      876 SF

      Syosset Office Space Available

      Office space available for lease in Syosset, New York.
      323-343 Jackson Ave, Syosset, NY 11791
      View Details
    • $22 SF/Yr
      11,780 SF

      Syosset Office Space: Prime Location

      Executive Suites, Coworking, Creative Offices
      6800 Jericho Tpke, Syosset, NY 11791
      View Details
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    40 Underhill Blvd
    Syosset, NY 11791-3490
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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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