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

    424 Williams Pl San Mateo, CA 94401-2470

    • Apartment buildings
    • 7,571 SF
    • 0.13 lot acres
    OFF-MARKET
    Last Sale
    Dec 02, 2020
    $2,550,000
    Value Estimations
    $2,805,000
    Show details
    Cap Rate Potential
    6.7%
    Apartment buildings
    Location Intelligence
    Property ID
    US09-1948777
    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

    • Apartment buildings

    Property Details for 424 Williams Pl

    Year built
    1941
    Lot size
    0.13 lot acres
    Property size
    7,571 SF
    Property type
    Apartment buildings
    APN
    032-173-060
    APU
    32173060

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      Statistic approach
      $2,545,000
      ML approach
      $2,610,000

    • CAP approach

      CAP Return
      Estimation
      6%
      $2,850,000
      6.5%
      $2,630,000
      7%
      $2,440,000

    • Comparable approach

      Method
      Estimation
      Statistic Estimate
      $3,919,000
      Market price range: $758k - $3.92M

    • Alternative Use

      Use
      Estimation
      APARTMENT HOUSE (5+ UNITS)
      $2,560,000
      Current use
      NEIGHBORHOOD: SHOPPING CENTER
      $4,085,000
      Change: +60% Conversion: Difficult
      RETAIL STORES
      $3,670,000
      Change: +43% Conversion: Difficult
      COMMERCIAL (GENERAL)
      $3,500,000
      Change: +37% Conversion: Moderate
      AUTO REPAIR, GARAGE
      $3,440,000
      Change: +34% Conversion: Difficult
      WAREHOUSE, STORAGE
      $2,895,000
      Change: +13% Conversion: Difficult

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

    Location Insight

    • Map
    • Local Demand
    City
    San Mateo
    County
    San Mateo
    State
    California
    Longitude
    -122.333
    Latitude
    37.5726
    CBSA code
    41860
    CBSA name
    SAN FRANCISCO-OAKLAND-FREMONT, CA 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
    $38,377
    $1,220,389
    $1,485,691
    $2,706,080
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation
      $475,000
      0.29 Acres

      819 Prospect Row

      APARTMENT HOUSE (5+ UNITS) • 0.29 Acres
      819 Prospect Row, San Mateo, CA 94401
      View Details
    • Value Estimation
      $1,055,000
      75,494 SF

      19 9th Ave

      APARTMENT HOUSE (5+ UNITS) • 75,494 SF
      19 9th Ave, San Mateo, CA 94401-4325
      View Details
    • Value Estimation
      $755,000
      14,100 SF

      221 El Camino Real

      APARTMENT HOUSE (5+ UNITS) • 14,100 SF
      221 El Camino Real, San Mateo, CA 94401-2561
      View Details
    • Value Estimation
      $995,000
      30,800 SF

      131 Elm St

      APARTMENT HOUSE (5+ UNITS) • 30,800 SF
      131 Elm St, San Mateo, CA 94401-2767
      View Details
    • Value Estimation
      $535,000
      10,572 SF

      111 Elm St

      APARTMENT HOUSE (5+ UNITS) • 10,572 SF
      111 Elm St, San Mateo, CA 94401-2787
      View Details
    • Value Estimation
      $315,000
      5,154 SF

      111 Grant St

      APARTMENT HOUSE (5+ UNITS) • 5,154 SF
      111 Grant St, San Mateo, CA 94401-2944
      View Details

    Similar Nearby for Sale

    • $5,700,000
      4,586 SF

      Remodeled Multi-Unit Investment Opportunity

      Twelve remodeled units in San Mateo with strong rental potential.
      735 N Amphlett Blvd, San Mateo, CA 94401
      View Details
    • $5,500,000
      7,756 SF

      San Mateo Multifamily Investment Opportunity

      Well-maintained 12-unit apartment building in desirable San Mateo location.
      1101 Tilton Ave, San Mateo, CA 94401
      View Details
    • $2,850,000
      4,586 SF

      Remodeled Multi-Unit Investment Opportunity

      Six remodeled units in San Mateo, ideal for investors.
      739 N Amphlett Blvd, San Mateo, CA 94401
      View Details
    • $2,495,000

      San Mateo Four-Unit Multifamily Property

      Well-maintained four-unit property in prime San Mateo location.
      444 Villa Ter, San Mateo, CA 94401
      View Details
    • New
      $1,798,888
      3,328 SF

      San Mateo Duplex: Ideal Investment

      Spacious duplex in Bowie Estates, San Mateo, near downtown.
      229 N Humboldt St, San Mateo, CA 94401
      View Details
    • $2,495,000
      3,607 SF

      San Mateo Fourplex Investment Opportunity

      Well-maintained fourplex in prime San Mateo location near top schools.
      444 Villa Ter, San Mateo, CA 94401
      View Details

    Similar Nearby for Lease

    • $3 SF/Yr
      2,740 SF

      Downtown San Mateo Office Space

      Office space in downtown San Mateo with open layout.
      2-98 E 4Th Ave, San Mateo, CA 94401
      View Details
    • $78 SF/Yr
      10,000 SF

      Downtown San Mateo Office Space

      10,000 SF office space in excellent condition for lease.
      307 South B St, San Mateo, CA 94401
      View Details
    • Contact for pricing
      1,188 SF

      Downtown San Mateo Retail Space

      Retail space in downtown San Mateo with open layout.
      420 S Ellsworth Ave, San Mateo, CA 94401
      View Details
    • $3 SF/Yr
      7,337 SF

      San Mateo Office Space Available

      Office space available for lease in San Mateo, CA.
      485-493 S El Camino Real, San Mateo, CA 94401
      View Details
    • Contact for pricing
      18,500 SF

      Downtown San Mateo Retail Space

      Large retail space suitable for a grocer in downtown San Mateo.
      222 E 4Th Ave, San Mateo, CA 94401
      View Details
    • $3 SF/Yr
      906 SF

      Downtown San Mateo Office Space

      Modern office suites in the heart of downtown San Mateo.
      217 B St, San Mateo, CA 94401
      View Details
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    424 Williams Pl
    San Mateo, CA 94401-2470
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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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