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    Property profile & analytics

    21 Gramling St Swd21 Marietta, GA 30008

    • Office properties & Spaces
    • 985 SF
    • 0.02 lot acres
    OFF-MARKET
    Last Sale
    Jul 13, 2025
    $215,000
    Value Estimations
    Cap Rate Potential
    Location Intelligence
    Property ID
    US22-0928130
    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 properties & Spaces

    Property Details for 21 Gramling St Swd21

    Year built
    1985
    Lot size
    0.02 lot acres
    Property size
    985 SF
    Zone code
    OI
    Property type
    Office properties & Spaces
    APN
    17021500910
    APU
    17021500910

    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
    Marietta
    County
    Cobb
    State
    Georgia
    Longitude
    -84.5536
    Latitude
    33.9409
    CBSA code
    12060
    CBSA name
    ATLANTA-SANDY SPRINGS-MARIETTA, GA 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
    $460
    $18,848
    $35,524
    $54,372
    -
    $47,120
    $88,810
    $135,930

    Comparable in this City

    • Value Estimation by Request
      985 SF

      22 Gramling St Swd22

      CONDOMINIUM OFFICES • 985 SF
      22 Gramling St Swd22, Marietta, GA 30008
      View Details
    • Value Estimation by Request
      988 SF

      7 Gramling St Swb7

      CONDOMINIUM OFFICES • 988 SF
      7 Gramling St Swb7, Marietta, GA 30008
      View Details
    • Value Estimation by Request
      988 SF

      10 Gramling St Swb10

      CONDOMINIUM OFFICES • 988 SF
      10 Gramling St Swb10, Marietta, GA 30008
      View Details
    • Value Estimation by Request
      1,680 SF

      3834 Austell Rd Sw Ste B

      CONDOMINIUM OFFICES • 1,680 SF
      3834 Austell Rd Sw Ste B, Marietta, GA 30008-5869
      View Details
    • Value Estimation by Request
      988 SF

      11 Gramling St Swb11

      CONDOMINIUM OFFICES • 988 SF
      11 Gramling St Swb11, Marietta, GA 30008
      View Details
    • Value Estimation by Request
      1,320 SF

      3834 Austell Rd Sw Ste C

      CONDOMINIUM OFFICES • 1,320 SF
      3834 Austell Rd Sw Ste C, Marietta, GA 30008-5869
      View Details

    Similar Nearby for Sale

    • Contact for pricing
      0.02 Acres

      Marietta Office Condo - Great Value!

      Updated Office Suite, Prime Location
      8 Gramling St, Marietta, GA 30008
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      Marietta Commercial Property for Sale

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    • $599,000

      Freestanding Building on Austell Road

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      5.76 Acres

      Marietta Industrial Land - $1.8M

      5.76 acres, HI & R zoning, ready to build.
      0 Sanders Rd, Marietta, GA 30008
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      Marietta Commercial Development Opportunity

      Three-acre parcel with commercial potential in Marietta, Georgia.
      2096 Austell Rd, Marietta, GA 30008
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    • New
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      0.31 Acres

      Renovated Marietta Home For Sale

      Turnkey, renovated four-sided brick home with tenant in place.
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    Similar Nearby for Lease

    • Contact for pricing

      Freestanding Building in Marietta, GA

      2,400 SF building on 0.26 acres in Marietta, GA.
      2111 Austell Rd SW, Marietta, GA 30008
      View Details
    • Contact for pricing

      Retail Space on Austell Road

      Retail spaces with excellent visibility and easy access.
      3715 Austell Rd, Marietta, GA 30008
      View Details
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    Marietta, GA 30008
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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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