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

    55 Union St San Francisco, CA 94111

    • Office buildings
    • 45,000 SF
    • 0.21 lot acres
    For Sale
    View listing
    Last Sale
    Jul 19, 2021
    $9,900,000
    Value Estimations
    Cap Rate Potential
    Location Intelligence
    Property ID
    US09-6148546
    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

    • Porter Novelli / Marketing Agency / Public Relations Firm
    • C Space San Francisco / Market Researcher
    • High Road San Francisco / Public Relations Firm

    Property Details for 55 Union St

    Year built
    1900
    Construction
    TILT-UP CONCRETE
    Lot size
    0.21 lot acres
    Property size
    45,000 SF
    Zone code
    C2
    Property type
    Office buildings
    APN
    0111 -004
    APU
    111004

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      Statistic approach
      $9,805,000
      ML approach
      $8,400,000

    • Comparable approach

      Method
      Estimation
      Statistic Estimate
      $11,503,000
      Market price range: $11.4M - $32.7M

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

    Location Insight

    • Map
    • Local Demand
    City
    San Francisco
    County
    San Francisco
    State
    California
    Longitude
    -122.401
    Latitude
    37.8012
    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
    $142,052
    $7,431,720
    $4,627,220
    $12,058,940
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation
      $210,000
      0.03 Acres

      505 Montgomery St

      OFFICE BUILDING • 0.03 Acres
      505 Montgomery St, San Francisco, CA 94111-6529
      View Details
    • Value Estimation
      $220,000
      0.03 Acres

      505 Montgomery St

      OFFICE BUILDING • 0.03 Acres
      505 Montgomery St, San Francisco, CA 94111-6529
      View Details
    • Value Estimation
      $335,000
      6,695 SF

      565 Clay St

      OFFICE BUILDING • 6,695 SF
      565 Clay St, San Francisco, CA 94111-3029
      View Details
    • Value Estimation
      $315,000
      252,050 SF

      353 Sacramento St

      OFFICE BUILDING • 252,050 SF
      353 Sacramento St, San Francisco, CA 94111-3687
      View Details
    • Value Estimation
      $540,000
      483,425 SF

      475 Sansome St

      OFFICE BUILDING • 483,425 SF
      475 Sansome St, San Francisco, CA 94111-3103
      View Details
    • Value Estimation
      $265,000
      11,740 SF

      401 Sansome St, Unit 405

      OFFICE BUILDING • 11,740 SF
      401 Sansome St, San Francisco, CA 94111-3102
      View Details

    Similar Nearby for Sale

    • Contact for pricing
      44,976 SF

      Historic Office Building in North Waterfront

      44,976 SF historic office building in San Francisco's North Waterfront.
      55 Union St, San Francisco, CA 94111
      View Details
    • $7,500,000
      12,500 SF

      Renovated Office Building For Sale

      Newly renovated office building with creative spaces and conference rooms.
      632 Commercial St, San Francisco, CA 94111
      View Details
    • $6,800,000
      19,212 SF

      Clintonville Medical Office Building

      Prime Clintonville location, 1860 sq ft.
      924 Sansome St, San Francisco, CA 94111
      View Details
    • $4,500,000
      12,222 SF

      Prime Location Retail Building

      Standalone building in prime location with convenient access to transit.
      435-443 Broadway St, San Francisco, CA 94111
      View Details
    • $4,300,000
      8,829 SF

      Mixed-Use Property in Telegraph Hill

      45-unit mixed-use property with retail and SRO units.
      371-377 Broadway St, San Francisco, CA 94111
      View Details
    • $1,500,000

      1111 Sansome St

      Land
      1111 Sansome St, San Francisco, CA 94111
      View Details

    Similar Nearby for Lease

    • Contact for pricing
      2,773 SF

      Steel Framed Office Building

      Office building featuring a unique vertical composition.
      244-252 California St, San Francisco, CA 94111
      View Details
    • Contact for pricing
      26,720 SF

      North Waterfront Office Space

      Office space for rent in San Francisco's north waterfront.
      940 Battery St, San Francisco, CA 94111
      View Details
    • $39 SF/Yr
      22,716 SF

      Jackson Square Office Space Available

      Classic office building in prime Jackson Street location for rent.
      414 Jackson St, San Francisco, CA 94111
      View Details
    • Contact for pricing
      12,369 SF

      Renovated Office Building in Jackson Square

      Four-story office building with award-winning interior design in San Francisco.
      735 Battery St, San Francisco, CA 94111
      View Details
    • Contact for pricing
      10,500 SF

      San Francisco Bay Area Office Suites

      Prime San Francisco Office Space: 1,185-4,364 sq ft.
      88 Davis St, San Francisco, CA 94111
      View Details
    • $38 SF/Yr
      12,600 SF

      99 Green St: Prime SF Office/Warehouse

      12,600 SF Office/Warehouse, Fully Vacant.
      99 Green St, San Francisco, CA 94111
      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.
    55 Union St
    San Francisco, CA 94111
    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.