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

    421 4th St Duluth, MN 55805-1997

    • Commercial real estate
    • 3,462 SF
    OFF-MARKET
    Last Sale
    Apr 09, 2025
    $300,000
    Value Estimations
    Cap Rate Potential
    Location Intelligence
    Property ID
    US46-1006890
    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

    • Dr. Robert J. Mohs, DDS / Dentist
    • Dr. Joseph Gregorich / Dentist
    • Dr. Nicholas Matack / Dentist

    Property Details for 421 4th St

    Year built
    1876
    Property size
    3,462 SF
    Property type
    Commercial real estate
    APN
    010-0990-00520
    APU
    10099000520

    Description

    This exceptional 3,462 square foot medical office building, located at 421 E 4th St in Duluth, Minnesota, presents a compelling investment opportunity. Currently vacant, this Class B property offers significant potential for a variety of professional uses, benefiting from its strategic location within the bustling hospital district. The building features two stories and two bedrooms, and sits on a commercially zoned lot allowing for mixed-use development. The asking price is $390,000, translating to $112.65 per square foot. A pro-forma cap rate of 10.26% and a pro-forma NOI of $40,000 indicate strong potential returns. The property enjoys high visibility due to a daily traffic flow of 6,800 vehicles and is surrounded by established local businesses, ensuring excellent foot traffic. This presents a rare chance to acquire a well-situated, versatile property in a thriving area. The property is offered as a Net Net Net (NNN) lease, and is currently for sale by owner. The property is zoned for Commercial - Mixed Use. This is an ideal opportunity for owner-users seeking a high-return investment or for investors looking to capitalize on the strong demand in the Duluth medical market. The property's location offers excellent visibility and accessibility, making it an attractive option for a wide range of businesses.

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

    • CAP approach

    • Comparable approach

    • Alternative Use

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

    Location Insight

    • Map
    • Local Demand
    City
    Duluth
    County
    St. Louis
    State
    Minnesota
    Longitude
    -92.0971
    Latitude
    46.7943
    CBSA code
    20260
    CBSA name
    DULUTH, MN-WI 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
    $9,450
    $189,000
    $157,500
    $346,500
    -
    $189,000
    $157,500
    $346,500

    Comparable in this City

    • Value Estimation by Request

      Duluth, MN 55805

      COMMERCIAL (GENERAL)
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    • Value Estimation by Request

      Duluth, MN 55805

      COMMERCIAL (GENERAL)
      Duluth, MN 55805
      View Details
    • Value Estimation
      $26,480,000
      102,792 SF

      1012 2nd St

      COMMERCIAL (GENERAL) • 102,792 SF
      1012 2nd St, Duluth, MN 55805-2200
      View Details
    • Value Estimation
      $32,705,000
      178,104 SF

      400 3rd St

      COMMERCIAL (GENERAL) • 178,104 SF
      400 3rd St, Duluth, MN 55805-1951
      View Details
    • Value Estimation by Request
      3,180 SF

      901 3rd St

      COMMERCIAL (GENERAL) • 3,180 SF
      901 3rd St, Duluth, MN 55805-2114
      View Details
    • Value Estimation
      $1,025,000
      28,600 SF

      Duluth, MN 55805

      COMMERCIAL (GENERAL) • 28,600 SF
      Duluth, MN 55805
      View Details

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    421 4th St
    Duluth, MN 55805-1997
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    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
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