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

    421 Humboldt St Santa Rosa, CA 95404-4214

    • Office buildings
    • 1,746 SF
    • 0.13 lot acres
    OFF-MARKET
    Value Estimations
    $305,000
    Show details
    Cap Rate Potential
    10%
    Office buildings
    Location Intelligence
    Property ID
    US09-1527563
    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

    • NOVA Non-Violent Alternatives / Social Services Organization
    • Schramm Susan J / Social Worker / Psychotherapist
    • Natalie Schramm / Social Worker

    Property Details for 421 Humboldt St

    Year built
    1922
    Construction
    WOOD
    Lot size
    0.13 lot acres
    Property size
    1,746 SF
    Property type
    Office buildings
    APN
    009-025-006-000
    APU
    9025006000

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      ML approach
      $265,000

    • CAP approach

      CAP Return
      Estimation
      6%
      $440,000
      6.5%
      $405,000
      7%
      $375,000

    • Comparable approach

      Method
      Estimation
      AI Estimate
      $276,000
      Market price range: $133k - $409k

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

    Location Insight

    • Map
    • Local Demand
    City
    Santa Rosa
    County
    Sonoma
    State
    California
    Longitude
    -122.714
    Latitude
    38.4422
    CBSA code
    42220
    CBSA name
    SANTA ROSA-PETALUMA, 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
    $5,205
    $127,464
    $279,586
    $407,050
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation
      $600,000
      41,543 SF

      90 St

      OFFICE BUILDING (MULTI-STORY) • 41,543 SF
      90 St, Santa Rosa, CA 95404-6503
      View Details
    • Value Estimation
      $295,000
      3,478 SF

      50 Ee St

      OFFICE BUILDING • 3,478 SF
      50 Ee St, Santa Rosa, CA 95404-4729
      View Details
    • Value Estimation
      $355,000
      1,892 SF

      151 Montgomery Dr

      OFFICE BUILDING • 1,892 SF
      151 Montgomery Dr, Santa Rosa, CA 95404-6627
      View Details
    • Value Estimation
      $595,000
      68,572 SF

      50 Old Courthouse Sq

      OFFICE BUILDING (MULTI-STORY) • 68,572 SF
      50 Old Courthouse Sq, Santa Rosa, CA 95404-4921
      View Details
    • Value Estimation
      $265,000
      2,874 SF

      621 Cherry St

      OFFICE BUILDING (MULTI-STORY) • 2,874 SF
      621 Cherry St, Santa Rosa, CA 95404-4202
      View Details
    • Value Estimation
      $260,000
      2,414 SF

      406 Chinn St

      OFFICE BUILDING (MULTI-STORY) • 2,414 SF
      406 Chinn St, Santa Rosa, CA 95404-4339
      View Details

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    • Contact for pricing
      11,552 SF

      Santa Rosa Office Building

      Office building with 11,552 square feet of space.
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    • $950,000
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      Santa Rosa Mixed-Use Building

      Mixed-use building in high-demand commercial district with on-site parking.
      717 College Ave, Santa Rosa, CA 95404
      View Details
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      High-visibility mixed-use property with office commercial zoning in Santa Rosa.
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    Similar Nearby for Lease

    • $1.70 SF/Yr
      2,898 SF

      Class A Office Space

      Class A office space in a three-building complex.
      2455 Bennett Valley Rd, Santa Rosa, CA 95404
      View Details
    • $9 SF/Yr
      6,149 SF

      Santa Rosa Office Space Available

      Flexible Offices, Coworking & More
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      View Details
    • $2 SF/Yr
      1,210 SF

      Neighborhood Shopping Center Retail Space

      Retail/office space in a well-known neighborhood shopping center.
      1615 Terrace Way, Santa Rosa, CA 95404
      View Details
    • $1.25 SF/Yr

      Santa Rosa Warehouse with Offices

      Upgraded warehouse with easy highway access and office space.
      374 Yolanda Ave, Santa Rosa, CA 95404
      View Details
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    421 Humboldt St
    Santa Rosa, CA 95404-4214
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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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