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    Property profile & analytics

    9101 4Th Ave Brooklyn, NY 11209

    • Office buildings
    • 8,325 SF
    • 0.07 lot acres
    For Lease
    View listing
    $31 SF/Yr
    Value Estimations
    Cap Rate Potential
    Location Intelligence
    Property ID
    US63-1662698
    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

    • United Sleep Diagnostic / Medical Clinic
    • BERNARD TOPI, MD – Maimonides Medical Center / Physician
    • PAOLO DESTEFANO, MD – Maimonides Medical Center / Physician
    • Urology Office-Igor Sergeyev / Physician / Medical Clinic
    • JOSEPH VITIELLO, MD – Maimonides Medical Center / Physician

    Property Details for 9101 4Th Ave

    Year built
    1910
    Lot size
    0.07 lot acres
    Property size
    8,325 SF
    Zone code
    C8-2
    Property type
    Office buildings
    APN
    06087-0011
    APU
    60870011

    Description

    This exceptional 2,800 square foot office space is located in a three-story elevator building at 9101 4th Avenue in Bay Ridge, Brooklyn, Kings County. Built in 1910, the building boasts a sturdy steel and masonry structure, allowing for easy reconfiguration to suit diverse business needs. Currently configured as medical office space, the property features a large reception area, six patient rooms, two conference rooms, a kitchenette, two private restrooms, and one public restroom, along with a spacious waiting area. The lot size is 3,388 square feet. The ceiling height varies throughout the space. Direct elevator access is a key advantage, with the option to disable elevator access outside of operating hours. The asking rent is inclusive of taxes. The owner offers a significant incentive: at least three months of free build-out time for new tenants. This presents a unique opportunity to customize the space to perfectly match your business requirements. The single-tenant occupancy provides privacy and control. Schedule a viewing at your convenience.

    Value Estimations

    based on Realmo’s proprietary methodology

    • CAP approach

      CAP Return
      Estimation
      6%
      $3,690,000
      6.5%
      $3,410,000
      7%
      $3,165,000

    • Alternative Use

      Use
      Estimation
      WAREHOUSE, STORAGE
      $4,170,000
      COMMERCIAL (GENERAL)
      $4,000,000

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

    Location Insight

    • Map
    • Local Demand
    City
    Brooklyn
    County
    Kings
    State
    New York
    Longitude
    -74.0296
    Latitude
    40.6189
    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
    2024
    $88,227
    $122,850
    $892,800
    $1,015,650
    -
    $273,000
    $1,984,000
    $2,257,000

    Comparable in this City

    • Value Estimation
      $7,005,000
      31,893 SF

      375 86th St, Unit 383

      OFFICE BUILDING (MULTI-STORY) • 31,893 SF
      375 86th St, Brooklyn, NY 11209-5079
      View Details
    • Value Estimation
      $1,305,000
      2,300 SF

      7606 7th Ave

      PROFESSIONAL BUILDING • 2,300 SF
      7606 7th Ave, Brooklyn, NY 11209-3321
      View Details
    • Value Estimation
      $975,000
      3,600 SF

      564 Bay Rdg Pkwy

      OFFICE BUILDING (MULTI-STORY) • 3,600 SF
      564 Bay Rdg Pkwy, Brooklyn, NY 11209-3310
      View Details
    • Value Estimation
      $990,000
      3,240 SF

      476 Bay Rdg Pkwy

      PROFESSIONAL BUILDING • 3,240 SF
      476 Bay Rdg Pkwy, Brooklyn, NY 11209-2702
      View Details
    • Value Estimation
      $12,130,000
      45,000 SF

      9920-9924 4th Ave

      OFFICE BUILDING (MULTI-STORY) • 45,000 SF
      9920-9924 4th Ave, Brooklyn, NY 11209
      View Details
    • Value Estimation
      $8,575,000
      6,500 SF

      9024 5th Ave

      PROFESSIONAL BUILDING • 6,500 SF
      9024 5th Ave, Brooklyn, NY 11209
      View Details

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    Similar Nearby for Lease

    • Contact for pricing
      5,000 SF

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    • Contact for pricing
      11,660 SF

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      Bay Ridge Office Space Available

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      View Details
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    9101 4Th Ave
    Brooklyn, NY 11209
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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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