Add Listing
    Property Lookup
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    3521 18th St San Francisco, CA 94110-1666

    Property Lookup

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

    3521 18th St San Francisco, CA 94110-1666

    View on Map
    • Apartment buildings
    • 5,924 SF
    • 0.09 lot acres
    Off-Market
    Property ID
    US09-5765805
    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
    $600,000
    Show details
    Cap Rate Potential
    Location Intelligence

    Current Use by Public Records

    • Apartment buildings

    Property Details for 3521 18th St

    Year built
    1923
    Construction
    WOOD
    Lot size
    0.09 lot acres
    Property size
    5,924 SF
    Zone code
    RM2
    Property type
    Apartment buildings
    APN
    3588 -001A
    APU
    3588001A

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      ML approach
      $385,000

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

    Location Insight

    • Map
    • Local Demand
    City
    San Francisco
    County
    San Francisco
    State
    California
    Longitude
    -122.422
    Latitude
    37.7615
    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
    $11,367
    $281,471
    $563,208
    $844,679
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation by Request
      0.05 Acres

      699 Guerrero St

      APARTMENT HOUSE (5+ UNITS) • 0.05 Acres
      699 Guerrero St, San Francisco, CA 94110
      View Details
    • Value Estimation
      $1,150,000
      4,665 SF

      21 Lapidge St

      APARTMENT HOUSE (5+ UNITS) • 4,665 SF
      21 Lapidge St, San Francisco, CA 94110-1688
      View Details
    • Value Estimation by Request
      5,065 SF

      29 Lapidge St

      APARTMENT HOUSE (5+ UNITS) • 5,065 SF
      29 Lapidge St, San Francisco, CA 94110-1689
      View Details
    • Value Estimation
      $1,100,000
      4,290 SF

      3666 20th St, Unit 3670

      APARTMENT HOUSE (5+ UNITS) • 4,290 SF
      3666 20th St, San Francisco, CA 94110-2315
      View Details
    • Value Estimation
      $1,120,000
      11,502 SF

      3232 21st St

      APARTMENT HOUSE (5+ UNITS) • 11,502 SF
      3232 21st St, San Francisco, CA 94110-2413
      View Details
    • Value Estimation
      $650,000
      7,358 SF

      3170 21st St, Unit 3180

      APARTMENT HOUSE (5+ UNITS) • 7,358 SF
      3170 21st St, San Francisco, CA 94110-2519
      View Details

    Similar Nearby for Sale

    • Contact for pricing
      4,420 SF

      Mission District Apartment Building

      Apartment building in vibrant Mission District with modern comfort.
      3160 24Th St, San Francisco, CA 94110
      View Details
    • $1,800,000

      San Francisco Multifamily Investment Opportunity

      5-unit multifamily property in San Francisco with 100% occupancy.
      1266-1272 Utah St, San Francisco, CA 94110
      View Details
    • $4,400,000
      5,697 SF

      Turnkey Renovated 5-Plex Near Tech

      Renovated 5-unit property with strong income and convenient location.
      1454 Van Ness Ave, San Francisco, CA 94110
      View Details
    • $5,500,000
      13,856 SF

      Mission District Mixed-Use Investment

      Mixed-use property in vibrant Mission District with upside potential.
      2360 Mission St, San Francisco, CA 94110
      View Details
    • $999,000

      Inner Mission Triplex Opportunity

      Well-located Inner Mission triplex with versatile unit mix.
      1270 Hampshire St, San Francisco, CA 94110
      View Details

    Similar Nearby for Lease

    • Contact for pricing

      Mission District Office Space

      Office space in a desirable, walkable Mission District location.
      3360 20Th St, San Francisco, CA 94110
      View Details
    • Contact for pricing

      Mission District Office Space

      Second floor office space in vibrant Mission District location.
      2729 Mission St, San Francisco, CA 94110
      View Details
    • Contact for pricing

      Office Space Available For Lease

      Office space for lease at 2001 Mission St, San Francisco.
      2001 Mission St, San Francisco, CA 94110
      View Details
    • Contact for pricing
      2,000 SF

      Restaurant Space with Type 1/2 Hoods

      Restaurant space with existing parklet in affluent neighborhood.
      300 Precita Ave, San Francisco, CA 94110
      View Details
    • Contact for pricing
      3,000 SF

      San Francisco Office Space Available

      3,000 SF office space for lease in San Francisco.
      121 Capp St, San Francisco, CA 94110
      View Details
    • Contact for pricing
      4,500 SF

      Harrison Street Flex / Warehouse Space

      Flex / warehouse space available in January 2026.
      2419 Harrison St, San Francisco, CA 94110
      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.
    3521 18th St
    San Francisco, CA 94110-1666
    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!