Your AI Navigator in Commercial Real Estate
Sign Up Successful!
You now have access to more from Realmo!
Property Lookup
    Property Lookup
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    AI Search
    Back to Search
    Property profile & analytics

    821 Main St Martinez, CA 94553-1225

    • Retail space
    • 1,674 SF
    • 0.06 lot acres
    OFF-MARKET
    Value Estimations
    $225,000
    Show details
    Cap Rate Potential
    Location Intelligence
    Property ID
    US10-3147701
    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

    • Retail space

    Property Details for 821 Main St

    Year built
    1972
    Lot size
    0.06 lot acres
    Property size
    1,674 SF
    Property type
    Retail space
    APN
    373-161-009-7
    APU
    3731610097

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      ML approach
      $225,000

    • Comparable approach

      Method
      Estimation
      AI Estimate
      $262,000
      Market price range: $67.1k - $263k

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

    Location Insight

    • Map
    • Local Demand
    City
    Martinez
    County
    Contra Costa
    State
    California
    Longitude
    -122.135
    Latitude
    38.0181
    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
    $6,466
    $113,781
    $369,792
    $483,573
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation
      $715,000
      41,868 SF

      911 Alhambra Ave, Unit 941

      RETAIL STORES (PERSONAL SERVICES) • 41,868 SF
      911 Alhambra Ave, Martinez, CA 94553-1605
      View Details
    • Value Estimation
      $255,000
      1,895 SF

      400 Fry St

      RETAIL STORES (PERSONAL SERVICES) • 1,895 SF
      400 Fry St, Martinez, CA 94553-1100
      View Details
    • Value Estimation
      $375,000
      9,784 SF

      6635 Alhambra Ave

      RETAIL STORES (PERSONAL SERVICES) • 9,784 SF
      6635 Alhambra Ave, Martinez, CA 94553-6154
      View Details
    • Value Estimation
      $240,000
      2,146 SF

      1616 Alhambra Ave

      RETAIL STORES (PERSONAL SERVICES) • 2,146 SF
      1616 Alhambra Ave, Martinez, CA 94553-2406
      View Details
    • Value Estimation
      $255,000
      4,721 SF

      802 Main St

      RETAIL STORES (PERSONAL SERVICES) • 4,721 SF
      802 Main St, Martinez, CA 94553-1226
      View Details
    • Value Estimation
      $340,000
      10,126 SF

      801 Main St, Unit 817

      RETAIL STORES (PERSONAL SERVICES) • 10,126 SF
      801 Main St, Martinez, CA 94553-1225
      View Details

    Similar Nearby for Sale

    • $1,400,000

      Updated Retail/Office Building For Sale

      Retail and office suites in blossoming Downtown Martinez.
      411 Ferry St, Martinez, CA 94553
      View Details
    • $2,500,000

      Versatile Retail Complex For Sale

      Two-building retail complex on nearly one acre with ample parking.
      4966 Pacheco Blvd, Martinez, CA 94553
      View Details
    • $2,600,000
      12,191 SF

      Mixed-Use Building in Downtown Martinez

      Two-story mixed-use building with retail and office space.
      700 Main St, Martinez, CA 94553
      View Details
    • $1,870,000
      4,767 SF

      Martinez Retail Business Opportunity

      Retail property with showroom, office, and storage space for sale.
      5050 Pacheco Blvd, Martinez, CA 94553
      View Details
    • Contact for pricing
      15,246 SF

      Martinez Office Building For Sale

      Office building with recent upgrades and convenient highway access.
      2870 Howe Rd, Martinez, CA 94553
      View Details
    • $699,000

      Martinez Specialty Property For Sale

      Specialty property available for purchase in Martinez, California.
      300 Lakehurst Dr, Martinez, CA 94553
      View Details

    Similar Nearby for Lease

    • $3 SF/Yr
      7,850 SF

      Retail Space in Martinez Center

      Retail space available in established Martinez shopping center.
      6648 Alhambra Ave, Martinez, CA 94553
      View Details
    • Contact for pricing
      1,563 SF

      Retail Space in Martinez, CA

      Retail space available for lease in Martinez, California.
      1160 Arnold Dr, Martinez, CA 94553
      View Details
    • Contact for pricing
      600 SF

      Retail Space Near Highway 4

      Retail space anchored by Lucky Supermarket and Rite Aid.
      1145 Arnold Dr, Martinez, CA 94553
      View Details
    • $4,725 /Mo

      Versatile Retail Space For Lease

      1350 sq ft retail space near major retailers.
      1124 Arnold Dr, Martinez, CA 94553
      View Details
    • $4,725 /Mo
      7,930 SF

      Versatile Retail Space For Lease

      1,350 sq ft retail space near major retailers.
      Arnold Dr #102B, Martinez, CA 94553
      View Details
    • Contact for pricing
      1,960 SF

      Retail Space in Martinez, CA

      Retail space available for lease in Martinez, California.
      1150 Arnold Dr, Martinez, CA 94553
      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.
    821 Main St
    Martinez, CA 94553-1225
    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.
    Create New Password
    • At least 8 characters
    • Contains both letters and numbers
    • Contains uppercase and lowercase letters
    • At most 32 characters
    • Password required
    • Password reset link has expired. Please request a new one.