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    Property profile & analytics

    21 Patten St Sonoma, CA 95476-6704

    • Office buildings
    • 2,531 SF
    • 0.10 lot acres
    OFF-MARKET
    Value Estimation
    $330,000
    Location Intelligence
    Property ID
    US09-1887393
    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

    • Office buildings

    Property Details for 21 Patten St

    Year built
    1978
    Construction
    WOOD
    Lot size
    0.10 lot acres
    Property size
    2,531 SF
    Property type
    Office buildings
    APN
    018-302-002-000
    APU
    18302002000

    Description

    This exceptional two-story commercial building at 21 Patten St., in the heart of Sonoma, offers ±1,725 square feet of immediately available office and retail space for lease. The property boasts a total of 2,125 square feet, divided into two suites: one on the ground floor and one on the second floor. Each suite offers abundant natural light. Individual suite sizes range from a minimum of 400 square feet to a maximum contiguous space of 1,325 square feet, providing flexibility for various business needs. The building is conveniently located just 0.2 miles from Sonoma Plaza, ensuring high visibility and accessibility. Eight on-site parking spaces are available for tenants and their clients. The property benefits from excellent signage opportunities facing Broadway, Sonoma's main thoroughfare. The Commercial District zoning permits both retail and office uses, making this a versatile space ideal for a variety of businesses. This is a rare opportunity to secure a well-located, attractive, and functional space in the vibrant Sonoma business district. Don't miss out on this chance to establish your business in a prime location.

    Value Estimation

    by Realmo proprietary methodology Last update: July 3, 2025

    • AI approach

      CAP return
      Estimation
      Estimation
      $320,000

    • CAP approach

      CAP return
      Estimation
      6%
      $400,000
      6.5%
      $355,000
      7%
      $365,000

    • Comparable approach

      Method
      Estimation
      Relative Method
      $325,000
      Geo Method
      $355,000

    • Alternative Use

      Use
      Estimation
      Distribution
      $415,000
      Retail
      $315,000
      Mixed-Use
      $365,000
      Hospitality
      $365,000
      Educational
      $315,000
      Residential Income
      $410,000
      Energy
      $390,000
      Income-Based Land
      $345,000
      Food Service
      $370,000

    Location Insight

    • Map
    • Local Demand
    City
    Sonoma
    County
    Sonoma
    State
    California
    Longitude
    -122.457
    Latitude
    38.2898
    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
    $6,132
    $72,507
    $290,054
    $362,561
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation by Request
      677 SF

      524 Broadway B Ste B

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      View Details
    • Value Estimation
      $875,000
      1,486 SF

      17474 Hwy 12

      OFFICE BUILDING • 1,486 SF
      17474 Hwy 12, Sonoma, CA 95476-3656
      View Details
    • Value Estimation
      $2,565,000
      4,966 SF

      19150 Hwy 12

      OFFICE BUILDING (MULTI-STORY) • 4,966 SF
      19150 Hwy 12, Sonoma, CA 95476-5412
      View Details
    • Value Estimation
      $13,105,000
      4,686 SF

      10 Maple St

      OFFICE BUILDING (MULTI-STORY) • 4,686 SF
      10 Maple St, Sonoma, CA 95476-7056
      View Details
    • Value Estimation by Request
      1,991 SF

      620 Broadway

      OFFICE BUILDING • 1,991 SF
      620 Broadway, Sonoma, CA 95476-7002
      View Details
    • Value Estimation
      $2,700,000
      4,917 SF

      967 Broadway

      OFFICE BUILDING • 4,917 SF
      967 Broadway, Sonoma, CA 95476-7403
      View Details

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    • Contact for pricing
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    21 Patten St
    Sonoma, CA 95476-6704
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    Realmo Value Estimation

    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.

    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.

    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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