Add Listing
Property Lookup
    Property Lookup
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    AI Search
    Back to Search
    The Largest CRE Database in the US with Over 1 Million Listings
    Property profile & analytics

    18340 Hwy 12 Sonoma, CA 95476-4373

    • Office buildings
    • 1,992 SF
    • 0.15 lot acres
    OFF-MARKET
    Value Estimations
    Cap Rate Potential
    Location Intelligence
    Property ID
    US09-1904031
    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 18340 Hwy 12

    Year built
    1980
    Construction
    WOOD
    Lot size
    0.15 lot acres
    Property size
    1,992 SF
    Property type
    Office buildings
    APN
    056-620-036-000
    APU
    56620036000

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

    • CAP approach

    • Comparable approach

    • Alternative Use

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

    Location Insight

    • Map
    • Local Demand
    City
    Sonoma
    County
    Sonoma
    State
    California
    Longitude
    -122.481
    Latitude
    38.3118
    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
    $6,098
    $188,349
    $188,349
    $376,698
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation by Request
      677 SF

      524 Broadway B Ste B

      OFFICE BUILDING • 677 SF
      524 Broadway B Ste B, Sonoma, CA 95476-6644
      View Details
    • Value Estimation
      $910,000
      1,486 SF

      17474 Hwy 12

      OFFICE BUILDING • 1,486 SF
      17474 Hwy 12, Sonoma, CA 95476-3656
      View Details
    • Value Estimation
      $2,455,000
      4,966 SF

      19150 Hwy 12

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

      10 Maple St

      OFFICE BUILDING (MULTI-STORY) • 4,686 SF
      10 Maple St, Sonoma, CA 95476-7056
      View Details
    • Value Estimation
      $700,000
      1,991 SF

      620 Broadway

      OFFICE BUILDING • 1,991 SF
      620 Broadway, Sonoma, CA 95476-7002
      View Details
    • Value Estimation
      $2,525,000
      4,917 SF

      967 Broadway

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

    Similar Nearby for Sale

    • Contact for pricing

      Sonoma Office Building For Sale

      Office building available for purchase in Sonoma, California.
      446-462 W Napa St, Sonoma, CA 95476
      View Details
    • Contact for pricing

      Sonoma Office Building For Sale

      Office building available for purchase in Sonoma, California.
      1151 Broadway, Sonoma, CA 95476
      View Details
    • $1,150,000
      1,333 SF

      Renovated Office Building Near Plaza

      Restored 1930 Sonoma office building near historic plaza.
      369 W Napa St, Sonoma, CA 95476
      View Details
    • $865,000
      1,695 SF

      Highway 12 Office with Live/Work

      1696 sq ft office building with live/work potential.
      17977 Sonoma Hwy, Sonoma, CA 95476
      View Details
    • $865,000
      1,695 SF

      Sonoma Highway Office with Live/Work

      Office building with live/work potential, great visibility, high traffic.
      17977 Sonoma Hwy, Sonoma, CA 95476
      View Details
    • Contact for pricing

      Sonoma Office Building For Sale

      Office building available for purchase in Sonoma, California.
      454 W Napa St, Sonoma, CA 95476
      View Details

    Similar Nearby for Lease

    • $24 SF/Yr
      1,696 SF

      Sonoma Hwy Executive Office Suite

      Prime Sonoma location, 1696 sq ft office.
      17977 Sonoma Hwy, Sonoma, CA 95476
      View Details
    • Contact for pricing

      Sonoma Highway Executive Office Suite

      Premium second-floor office suite in Sonoma's thriving commercial district.
      18506 Highway 12, Sonoma, CA 95476
      View Details
    • Contact for pricing
      12,997 SF

      Sonoma Office Space For Rent

      Demised office space within walking distance to Sonoma Plaza.
      579 1St St, Sonoma, CA 95476
      View Details
    • $31 SF/Yr
      11,032 SF

      Sonoma Office Building For Sale

      Prime Sonoma location, versatile office space
      19080 Lomita Ave, Sonoma, CA 95476
      View Details
    • Contact for pricing

      Sonoma Mixed-Use Commercial Spaces

      Mixed-use commercial spaces available for lease in Sonoma, California.
      989 Sonoma Hwy, Sonoma, CA 95476
      View Details
    • Contact for pricing

      Retail Space Near Sonoma Plaza

      Retail space with high visibility near Sonoma's historic plaza.
      452 1St St East, Sonoma, CA 95476
      View Details
    Request Owner's contact information
    Message sent successfully
    Error
    If you are the owner or broker of this property and would like to edit or remove this listing please send a message to web site administrator.
    18340 Hwy 12
    Sonoma, CA 95476-4373
    Message sent successfully
    Error
    Email to Your Friends
    Link copied to clipboard
    Separate multiple addresses with a comma
    Message sent successfully
    Error

    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
    Thanks! Your message was sent.
    Error! Your message wasn't sent.
    Please enter your name
    Please enter email
    Please enter the email in the correct format
    Please enter phone
    Please enter the number in the correct format
    Please enter message
    Thank You

    You are Unsubscribed From Notifications

    Google sign-in failed. Please try again or use another login method.
    Sign Up Successful!
    You now have access to more from Realmo!