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

    27 William St Cambridge, MA 02139-3811

    • Residential income homes
    • 3,265 SF
    • 0.09 lot acres
    OFF-MARKET
    Value Estimations
    $725,000
    Show details
    Cap Rate Potential
    Location Intelligence
    Property ID
    US38-0649695
    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

    • Residential income homes

    Property Details for 27 William St

    Year built
    1890
    Construction
    FRAME
    Lot size
    0.09 lot acres
    Property size
    3,265 SF
    Zone code
    C
    Property type
    Residential income homes
    Property subtype
    Serviced apartments
    APN
    CAMB M:00105 L:00030
    APU
    CAMBM00105L00030

    Value Estimations

    based on Realmo’s proprietary methodology

    • Alternative Use

      Use
      Estimation
      APARTMENT HOUSE (5+ UNITS)
      $750,000
      Current use
      AUTO REPAIR, GARAGE
      $920,000
      Change: +22% Conversion: Difficult
      NEIGHBORHOOD: SHOPPING CENTER
      $905,000
      Change: +20% Conversion: Difficult
      RETAIL STORES
      $880,000
      Change: +17% Conversion: Difficult

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

    Location Insight

    • Map
    • Local Demand
    City
    Cambridge
    County
    Middlesex
    State
    Massachusetts
    Longitude
    -71.1062
    Latitude
    42.3638
    CBSA code
    14460
    CBSA name
    BOSTON-CAMBRIDGE-QUINCY, MA-NH 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
    $17,367
    $1,830,800
    $1,102,800
    $2,933,600
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation
      $965,000
      4,784 SF

      8 Bigelow St

      BOARDING/ROOMING HOUSE • 4,784 SF
      8 Bigelow St, Cambridge, MA 02139-2386
      View Details
    • Value Estimation
      $940,000
      4,414 SF

      62-64 Amory St

      BOARDING/ROOMING HOUSE • 4,414 SF
      62-64 Amory St, Cambridge, MA 02139
      View Details
    • Value Estimation
      $905,000
      4,337 SF

      61 Fayette St

      BOARDING/ROOMING HOUSE • 4,337 SF
      61 Fayette St, Cambridge, MA 02139-1135
      View Details
    • Value Estimation
      $775,000
      3,694 SF

      151-153 Auburn St

      BOARDING/ROOMING HOUSE • 3,694 SF
      151-153 Auburn St, Cambridge, MA 02139
      View Details
    • Value Estimation
      $865,000
      4,216 SF

      89 Hancock St

      BOARDING/ROOMING HOUSE • 4,216 SF
      89 Hancock St, Cambridge, MA 02139-2224
      View Details
    • Value Estimation
      $2,160,000
      10,770 SF

      344 Harvard St

      BOARDING/ROOMING HOUSE • 10,770 SF
      344 Harvard St, Cambridge, MA 02139-2002
      View Details

    Similar Nearby for Sale

    • $2,900,000
      0.12 Acres

      Cambridge Development Opportunity

      Rare Cambridgeport development opportunity with strong income and exceptional flexibility.
      114 Elm St, Cambridge, MA 02139
      View Details
    • $2,985,000
      Pending

      Cambridgeport Multi-Family Conversion Opportunity

      Three-family building on a corner lot near Central Square.
      174 Hamilton St, Cambridge, MA 02139
      View Details
    • Contact for pricing

      Cambridge Eight-Family Investment Opportunity

      Eight-family property near Inman and Central Square, Cambridge.
      31 Tremont St, Cambridge, MA 02139
      View Details
    • $2,985,000
      Pending

      Cambridgeport Three-Family Building For Sale

      Three-family building with conversion potential in prime Cambridgeport location.
      174 Hamilton St, Cambridge, MA 02139
      View Details
    • Contact for pricing

      Mass Ave Development Opportunity

      Prime Cambridge real estate with upzoning potential.
      930 Massachusetts Ave, Cambridge, MA 02139
      View Details
    • Contact for pricing

      Landmark Building in Central Square

      Historic building in high-traffic Cambridge location, ideal for restaurant.
      25 Central Sq, Cambridge, MA 02139
      View Details

    Similar Nearby for Lease

    • Contact for pricing
      29,520 SF

      Kendall Square Office Building

      Nine-story office building with enclosed parking in Kendall Square.
      50 Hampshire St, Cambridge, MA 02139
      View Details
    • Contact for pricing
      3,976 SF

      Cambridge Office Space For Rent

      Office space with high ceilings and lower level included.
      350 Broadway, Cambridge, MA 02139
      View Details
    • $49 SF/Yr
      900 SF

      Cambridge Commercial Space on Mass Ave

      Turnkey commercial space in Cambridge, close to transportation and parking.
      350 Massachusetts Ave, Cambridge, MA 02139
      View Details
    • Contact for pricing
      9,982 SF

      Renovated Office Building Near Central

      Renovated 9,982 SF office building with modern amenities.
      130 Prospect St, Cambridge, MA 02139
      View Details
    • Contact for pricing
      2,372 SF

      Equipped Restaurant Space in Cambridge

      Fully equipped restaurant/bar in Inman Square, Cambridge near Harvard/MIT.
      323 Prospect St, Cambridge, MA 02139
      View Details
    • Contact for pricing
      7,517 SF

      Cambridge R&D Building For Rent

      Single tenant R&D building, fully built-out and furnished space.
      357-365 Allston St, Cambridge, MA 02139
      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.
    27 William St
    Cambridge, MA 02139-3811
    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!