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

    309 Main St Mount Airy, MD 21771-5348

    • Office buildings
    • 2,091 SF
    • 0.50 lot acres
    OFF-MARKET
    Last Sale
    Aug 16, 2023
    $415,000
    Value Estimations
    $305,000
    Show details
    Cap Rate Potential
    4.5%
    Office buildings
    Location Intelligence
    Property ID
    US40-0451811
    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

    • Office buildings

    Property Details for 309 Main St

    Year built
    1900
    Construction
    BRICK
    Lot size
    0.50 lot acres
    Property size
    2,091 SF
    Zone code
    DTZ
    Property type
    Office buildings
    APN
    13-015147
    APU
    13015147

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      Statistic approach
      $350,000
      ML approach
      $405,000

    • CAP approach

      CAP Return
      Estimation
      6%
      $260,000
      6.5%
      $240,000
      7%
      $225,000

    • Comparable approach

      Method
      Estimation
      Statistic Estimate
      $260,000
      Market price range: $178k - $503k
      AI Estimate
      $234,000
      Market price range: $210k - $365k

    • Alternative Use

      Use
      Estimation
      OFFICE BUILDING
      $340,000
      Current use
      RETAIL STORES
      $435,000
      Change: +27% Conversion: Moderate
      AUTO REPAIR, GARAGE
      $365,000
      Change: +7% Conversion: Difficult

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

    Location Insight

    • Map
    • Local Demand
    City
    Mount Airy
    County
    Carroll
    State
    Maryland
    Longitude
    -77.1557
    Latitude
    39.3749
    CBSA code
    12580
    CBSA name
    BALTIMORE-TOWSON, MD 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
    2023
    $3,683
    $190,500
    $93,600
    $284,100
    -
    $190,500
    $93,600
    $284,100

    Comparable in this City

    • Value Estimation by Request
      15,000 SF

      2401 Back Acre Cir

      OFFICE BUILDING • 15,000 SF
      2401 Back Acre Cir, Mount Airy, MD 21771-7787
      View Details
    • Value Estimation by Request
      2,482 SF

      4319 Rdg Rd

      OFFICE BUILDING • 2,482 SF
      4319 Rdg Rd, Mount Airy, MD 21771-8933
      View Details
    • Value Estimation by Request
      1,420 SF

      684 Rdg Rd

      OFFICE BUILDING • 1,420 SF
      684 Rdg Rd, Mount Airy, MD 21771-3914
      View Details
    • Value Estimation
      $240,000
      2,307 SF

      2 Park Ave

      OFFICE BUILDING • 2,307 SF
      2 Park Ave, Mount Airy, MD 21771-5438
      View Details
    • Value Estimation
      $385,000
      3,496 SF

      108 Ridgeville Blvd

      OFFICE BUILDING • 3,496 SF
      108 Ridgeville Blvd, Mount Airy, MD 21771-5934
      View Details
    • Value Estimation
      $315,000
      4,818 SF

      1507 Main St

      OFFICE BUILDING • 4,818 SF
      1507 Main St, Mount Airy, MD 21771-5393
      View Details

    Similar Nearby for Sale

    • $4,500,000
      28,656 SF

      Free-Standing Building Sitting on 1.63 AC Commercial/Industrial zoning For Sale

      Free-Standing Building Sitting on 1.63 AC Commercial/Industrial zoning For Sale
      205 Center St, Mount Airy, MD 21771
      View Details
    • $299,900

      Mount Airy Commercial Space

      Commercial space for sale in Mount Airy, Maryland.
      401 Center St, Mount Airy, MD 21771
      View Details
    • $180,000

      Land for Sale

      Land available for sale.
      18729 Penn Shop Rd, Mount Airy, MD 21771
      View Details
    • $99,900

      Land Available in Mount Airy

      Land for sale in Mount Airy, Maryland.
      .58+- Acres Ctr St, Mount Airy, MD 21771
      View Details
    • $1,100,000

      Mount Airy Specialty Property

      Specialty property available for sale in Mount Airy, Maryland.
      8730 Mapleville Rd, Mount Airy, MD 21771
      View Details
    • $299,900

      Commercial Land For Sale

      Commercial land available for sale.
      101 Center St, Mount Airy, MD 21771
      View Details

    Similar Nearby for Lease

    • $16 SF/Yr
      43,124 SF

      Mount Airy Office Space Lease

      Office spaces available for lease in Mount Airy, Maryland.
      1311 Main St, Mount Airy, MD 21771
      View Details
    • $16 SF/Yr
      28,656 SF

      Mt. Airy MD Commercial Property

      Multi-use building, prime location, high income area
      205 Center St, Mount Airy, MD 21771
      View Details
    • $5,000 /Mo

      Mount Airy Retail/Office Space

      Retail and office spaces available for lease in Mount Airy.
      845 Ridge Rd, Mount Airy, MD 21771
      View Details
    • $2,900 /Mo
      10,019 SF

      Mount Airy Professional Office Suite

      Professional office suite in Mt. Airy, MD, available for lease.
      602 Center St, Mount Airy, MD 21771
      View Details
    • $1,000 /Mo

      Mount Airy Professional Office Space

      Professional office space in desirable Mount Airy commercial area.
      205 E Ridgeville Blvd, Mount Airy, MD 21771
      View Details
    • $385 /Mo

      Office Space in Mount Airy

      Single-user office space available in Mount Airy, Maryland.
      1517 Ridgeside Dr, Mount Airy, MD 21771
      View Details
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    309 Main St
    Mount Airy, MD 21771-5348
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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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