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    Property profile & analytics

    3121 4th SW St Mason City, IA 50401-1581

    • Medical offices
    • 13,040 SF
    • 1.52 lot acres
    OFF-MARKET
    Value Estimations
    $770,000
    Show details
    Cap Rate Potential
    Location Intelligence
    Property ID
    US25-0562630
    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. Christopher F. Blodi, MD / Ophthalmologist
    • Melissa Summerfield / Ophthalmologist
    • Bradney Carter / Ophthalmologist
    • Dr. Brandt Riley / Ophthalmologist
    • Bradley Isaak / Ophthalmologist

    Property Details for 3121 4th SW St

    Year built
    1982
    Lot size
    1.52 lot acres
    Property size
    13,040 SF
    Property type
    Medical offices
    Property subtype
    Medical centers
    APN
    70740200100
    APU
    70740200100

    Value Estimations

    based on Realmo’s proprietary methodology

    • Comparable approach

      Method
      Estimation
      AI Estimate
      $704,000
      Market price range: $310k - $1.11M

    • Alternative Use

      Use
      Estimation
      MEDICAL BUILDING
      $725,000
      Current use
      OFFICE BUILDING
      $1,260,000
      Change: +73% Conversion: Easy
      RESTAURANT
      $950,000
      Change: +31% Conversion: Difficult
      WAREHOUSE, STORAGE
      $835,000
      Change: +15% Conversion: Difficult
      AUTO REPAIR, GARAGE
      $825,000
      Change: +14% Conversion: Difficult
      INDUSTRIAL (GENERAL)
      $800,000
      Change: +10% Conversion: Difficult
      RETAIL STORES
      $625,000
      Change: -14% Conversion: Difficult

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

    Location Insight

    • Map
    • Local Demand
    City
    Mason City
    County
    Cerro Gordo
    State
    Iowa
    Longitude
    -93.2478
    Latitude
    43.1474
    CBSA code
    32380
    CBSA name
    MASON CITY, IA MICROPOLITAN 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
    $47,150
    $573,120
    $1,136,720
    $1,709,840
    -
    $573,120
    $1,136,720
    $1,709,840

    Comparable in this City

    • Value Estimation
      $905,000
      36,234 SF

      621 Illinois Ave

      MEDICAL BUILDING • 36,234 SF
      621 Illinois Ave, Mason City, IA 50401-5405
      View Details
    • Value Estimation
      $550,000
      6,000 SF

      4199 4th SW St

      MEDICAL BUILDING • 6,000 SF
      4199 4th SW St, Mason City, IA 50401-7303
      View Details
    • Value Estimation by Request
      5,336 SF

      1420 4th SE St

      MEDICAL BUILDING • 5,336 SF
      1420 4th SE St, Mason City, IA 50401-4438
      View Details
    • Value Estimation by Request
      8,342 SF

      1530 Monroe Ave

      MEDICAL BUILDING • 8,342 SF
      1530 Monroe Ave, Mason City, IA 50401-5606
      View Details
    • Value Estimation
      $3,075,000
      51,806 SF

      250 Cres Dr

      MEDICAL BUILDING • 51,806 SF
      250 Cres Dr, Mason City, IA 50401-2926
      View Details
    • Value Estimation by Request
      2,130 SF

      1339 6th SW St

      MEDICAL BUILDING • 2,130 SF
      1339 6th SW St, Mason City, IA 50401-4815
      View Details

    Similar Nearby for Sale

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      Mason City Office Building For Sale

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    • $730,000
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    • New
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      Upscale office building with self-produced energy and expansion options.
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    • Contact for pricing
      1,291 SF

      Prime Downtown Mason City Office

      First-class office space in the heart of downtown Mason City.
      202 1St St SE, Mason City, IA 50401
      View Details
    • New
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      3,055 SF

      Upscale Office Park with Unique Features

      Energy-efficient office building with potential for expansion on 2.17 acres.
      524 Village Green Dr, Mason City, IA 50401
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    • $730,000
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      Mixed-Use Commercial Property Package

      Six parcels with storefronts, apartments, and business opportunities.
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    Similar Nearby for Lease

    • $6 SF/Yr
      1,592 SF

      Professional Office Space in Mason

      Office space in Mason City's town square, near restaurants.
      10 N Washington Ave, Mason City, IA 50401
      View Details
    • $120 SF/Yr
      1,000 SF

      Mason City Executive Office Suite

      1000 sq ft Office Space - NNN Lease
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      View Details
    • $1,000 /Mo

      Prime Downtown Mason City Office

      969 SF office suite in downtown Mason City.
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      View Details
    • $6 SF/Yr
      13,762 SF

      Mason City Office Space Available

      Prime downtown location, multiple suites, 1800-6000 sq ft.
      10 Washington Ave, Mason City, IA 50401
      View Details
    • $1,500 /Mo

      Downtown Mason City Office Space

      Prime office space in downtown Mason City with excellent visibility.
      202 1St St SE, Mason City, IA 50401
      View Details
    • New
      $950 /Mo
      Pending

      Prime Downtown Mason City Office

      860 SF office suite in downtown Mason City.
      202 1St St SE, Mason City, IA 50401
      View Details
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    3121 4th SW St
    Mason City, IA 50401-1581
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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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