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    823 Sonoma Ave Santa Rosa, CA 95404-4714
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    823 Sonoma Ave Santa Rosa, CA 95404-4714

    View on Map
    • Office buildings
    • 4,245 SF
    • 0.34 lot acres
    Off-Market
    Property ID
    US09-1751890
    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.
    Value Estimations
    $955,000
    Show details
    Cap Rate Potential
    Location Intelligence

    Current Use by Public Records

    • William B Doty Law Offices / Law Firm
    • North Bay Property Advisors / Real Estate Agency
    • CIRE Property Management / Real Estate Agency
    • Embolden Law PC / Law Firm
    • Flatt Gail F / Law Firm

    Property Details for 823 Sonoma Ave

    Year built
    1973
    Construction
    WOOD
    Lot size
    0.34 lot acres
    Property size
    4,245 SF
    Property type
    Office buildings
    APN
    009-181-005-000
    APU
    9181005000

    Value Estimations

    based on Realmo’s proprietary methodology

    • CAP approach

      CAP Return
      Estimation
      6%
      $1,065,000
      6.5%
      $985,000
      7%
      $915,000

    • Comparable approach

      Method
      Estimation
      AI Estimate
      $892,000
      Market price range: $324k - $995k

    • Alternative Use

      Use
      Estimation
      OFFICE BUILDING
      $1,230,000
      Current use
      MEDICAL BUILDING
      $1,560,000
      Change: +27% Conversion: Easy
      AUTO REPAIR, GARAGE
      $1,225,000
      Change: -1% Conversion: Difficult
      COMMERCIAL (GENERAL)
      $1,215,000
      Change: -1% Conversion: Easy
      RETAIL STORES
      $1,180,000
      Change: -4% Conversion: Moderate

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

    Location Insight

    • Map
    • Local Demand
    City
    Santa Rosa
    County
    Sonoma
    State
    California
    Longitude
    -122.708
    Latitude
    38.4396
    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
    $15,211
    $459,725
    $853,781
    $1,313,506
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation
      $2,325,000
      10,310 SF

      30 Kawana Spgs Rd

      OFFICE BUILDING • 10,310 SF
      30 Kawana Spgs Rd, Santa Rosa, CA 95404-6309
      View Details
    • Value Estimation
      $2,065,000
      15,370 SF

      85 Brookwood Ave

      OFFICE BUILDING (MULTI-STORY) • 15,370 SF
      85 Brookwood Ave, Santa Rosa, CA 95404-4513
      View Details
    • Value Estimation
      $660,000
      2,902 SF

      633 Cherry St

      OFFICE BUILDING (MULTI-STORY) • 2,902 SF
      633 Cherry St, Santa Rosa, CA 95404-4202
      View Details
    • Value Estimation by Request
      2,459 SF

      800 College Ave

      OFFICE BUILDING (MULTI-STORY) • 2,459 SF
      800 College Ave, Santa Rosa, CA 95404-4109
      View Details
    • Value Estimation
      $530,000
      2,146 SF

      923 College Ave

      OFFICE BUILDING • 2,146 SF
      923 College Ave, Santa Rosa, CA 95404-4110
      View Details
    • Value Estimation
      $1,210,000
      5,130 SF

      1303 College Ave

      OFFICE BUILDING (MULTI-STORY) • 5,130 SF
      1303 College Ave, Santa Rosa, CA 95404-3909
      View Details

    Similar Nearby for Sale

    • Contact for pricing
      31,356 SF

      Prime Downtown Santa Rosa Corner

      Two-story mixed-use building on a 31,363 sqft lot.
      10 Santa Rosa Ave, Santa Rosa, CA 95404
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    • $1,450,000
      4,297 SF

      Santa Rosa Office Building For Sale

      Office building for sale in Santa Rosa, California.
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    • $950,000
      4,913 SF

      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
    • $1,295,000
      4,297 SF

      Charming Santa Rosa Office Building

      Two-story office building near downtown and Santa Rosa Junior College.
      825 College Ave, Santa Rosa, CA 95404
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    • $1,150,000
      2,868 SF

      Updated Office Building in Santa Rosa

      Professionally updated office building with recent improvements and ample parking.
      4010 Montecito Ave, Santa Rosa, CA 95404
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    • $739,000
      1,622 SF

      Craftsman Office Building with Parking

      Classic 1920s office building with parking and handicap access.
      705 College Ave, Santa Rosa, CA 95404
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    Similar Nearby for Lease

    • $1.70 SF/Yr
      3,032 SF

      Class A Office Space

      Class A office space in a three-building complex.
      2455 Bennett Valley Rd, Santa Rosa, CA 95404
      View Details
    • Contact for pricing

      Flexible Workspace Solutions Available

      Global network of workspaces with tailored options for various needs.
      111 Santa Rosa Ave, Santa Rosa, CA 95404
      View Details
    • Contact for pricing

      Santa Rosa Office Space

      Single tenant office space available for rent in Santa Rosa.
      1701 4Th St, Santa Rosa, CA 95404
      View Details
    • Contact for pricing

      Medical Office Near Santa Rosa

      Medical office space near hospitals and downtown Santa Rosa.
      868-B 2Nd St, Santa Rosa, CA 95404
      View Details
    • Contact for pricing

      Medical Office Space For Lease

      Medical office building for lease near Downtown Santa Rosa.
      101 Brookwood Ave, Santa Rosa, CA 95404
      View Details
    • Contact for pricing

      Retail or Office Space Available

      Commercial retail or office space for lease near the airport.
      Santa Rosa, CA 95404
      View Details
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    823 Sonoma Ave
    Santa Rosa, CA 95404-4714
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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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