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

    21 Un St New Brunswick, NJ 08901-1114

    • Residential income homes
    • 8,782 SF
    • 0.51 lot acres
    OFF-MARKET
    Last Sale
    Sep 21, 2020
    Value Estimations
    $2,115,000
    Show details
    Cap Rate Potential
    Location Intelligence
    Property ID
    US59-1292886
    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

    • Delta Phi Fraternity House / Volunteer Organization / Community Center
    • Phi Mu - Phi Nu Chapter / High School

    Property Details for 21 Un St

    Year built
    1892
    Lot size
    0.51 lot acres
    Property size
    8,782 SF
    Zone code
    IN-1
    Property type
    Residential income homes
    Property subtype
    Small apartment buildings
    APN
    13 00054-0000-00038
    APU
    1300054000000038

    Value Estimations

    based on Realmo’s proprietary methodology

    • CAP approach

      CAP Return
      Estimation
      6%
      $2,450,000
      6.5%
      $2,260,000
      7%
      $2,100,000

    • Comparable approach

      Method
      Estimation
      Statistic Estimate
      $2,574,000
      Market price range: $1.78M - $2.57M
      AI Estimate
      $1,505,000
      Market price range: $503k - $1.51M

    • Alternative Use

      Use
      Estimation
      APARTMENT HOUSE (5+ UNITS)
      $2,235,000
      Current use
      OFFICE BUILDING
      $2,500,000
      Change: +12% Conversion: Moderate
      INDUSTRIAL (GENERAL)
      $1,955,000
      Change: -13% Conversion: Difficult
      COMMERCIAL (GENERAL)
      $1,845,000
      Change: -18% Conversion: Moderate

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

    Location Insight

    • Map
    • Local Demand
    City
    New Brunswick
    County
    Middlesex
    State
    New Jersey
    Longitude
    -74.4498
    Latitude
    40.4998
    CBSA code
    35620
    CBSA name
    NEW YORK-NORTHERN NEW JERSEY-LONG ISLAND, NY-NJ-PA 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
    2022
    $74,732
    $691,300
    $2,311,200
    $3,002,500
    -
    $691,300
    $2,311,200
    $3,002,500

    Comparable in this City

    • Value Estimation
      $780,000
      3,000 SF

      17 Mine St

      APARTMENT HOUSE (UNDER 5 UNITS) • 3,000 SF
      17 Mine St, New Brunswick, NJ 08901-1477
      View Details
    • Value Estimation
      $3,285,000
      18,216 SF

      32 Un St

      APARTMENT HOUSE (UNDER 5 UNITS) • 18,216 SF
      32 Un St, New Brunswick, NJ 08901-5109
      View Details
    • Value Estimation
      $565,000
      1,888 SF

      12 Bartlett St

      APARTMENT HOUSE (UNDER 5 UNITS) • 1,888 SF
      12 Bartlett St, New Brunswick, NJ 08901-1323
      View Details
    • Value Estimation
      $1,620,000
      9,294 SF

      147 Welton St

      APARTMENT HOUSE (UNDER 5 UNITS) • 9,294 SF
      147 Welton St, New Brunswick, NJ 08901-2579
      View Details
    • Value Estimation
      $610,000
      2,816 SF

      40 Hardenberg St

      APARTMENT HOUSE (UNDER 5 UNITS) • 2,816 SF
      40 Hardenberg St, New Brunswick, NJ 08901-1809
      View Details
    • Value Estimation
      $3,075,000
      12,782 SF

      100 Hiram Sq

      APARTMENT HOUSE (UNDER 5 UNITS) • 12,782 SF
      100 Hiram Sq, New Brunswick, NJ 08901-1264
      View Details

    Similar Nearby for Sale

    • Contact for pricing
      4,752 SF

      Fully Rented 18-Unit Rooming House

      18-unit rooming house, fully rented, high income, easy to manage.
      163 Livingston Ave, New Brunswick, NJ 08901
      View Details
    • $1,300,000
      4,167 SF

      Livingston Avenue Mixed-Use Building

      2.5 story building with office and apartments for sale.
      137 Livingston Ave, New Brunswick, NJ 08901
      View Details
    • $1,300,000
      4,167 SF

      Livingston Avenue Commercial Building

      2.5-story building with office and apartments in New Brunswick.
      137 Livingston Ave, New Brunswick, NJ 08901
      View Details
    • $1,550,000
      4,752 SF

      Fully Rented 18-Unit Rooming House

      18 units, fully rented, high income, easy to manage.
      163 Livingston Ave, New Brunswick, NJ 08901
      View Details
    • $2,100,000

      Five-Unit Building For Sale

      Five-unit building available in New Brunswick City.
      49 Bayard St, New Brunswick, NJ 08901
      View Details
    • $750,000
      1,520 SF

      Two-Family Investment Near Rutgers Campus

      Two-family property near Rutgers University with off-street parking.
      84 Ray St, New Brunswick, NJ 08901
      View Details

    Similar Nearby for Lease

    • Contact for pricing

      Industrial Space with Easy Access

      7,380 SF industrial unit with tailgates and drive-in.
      14 Jules Ln, New Brunswick, NJ 08901
      View Details
    • $1.65 SF/Yr
      3,464 SF

      New Brunswick Executive Office Suite

      Prime Office Space, Newly Renovated, 3,464 sq ft
      142 Livingston Ave, New Brunswick, NJ 08901
      View Details
    • Contact for pricing
      487 SF

      Historic Office Building in New Brunswick

      Renovated office building in New Brunswick's Historic District.
      90 Livingston Ave, New Brunswick, NJ 08901
      View Details
    • Contact for pricing
      49,000 SF

      Prime Retail Space in New Brunswick

      Retail space adjacent to The Helix development and New Brunswick Station.
      97 Paterson St, New Brunswick, NJ 08901
      View Details
    • Contact for pricing

      Warehouse Space with Easy Access

      Warehouse space available with convenient highway access and parking.
      11 Jules Ln, New Brunswick, NJ 08901
      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.
    21 Un St
    New Brunswick, NJ 08901-1114
    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!