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

    421 21st Ave Longmont, CO 80501-1469

    • Office buildings
    • 20,664 SF
    • 1.17 lot acres
    OFF-MARKET
    Value Estimations
    $2,635,000
    Show details
    Cap Rate Potential
    Location Intelligence
    Property ID
    US13-0451519
    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

    • Soul Body Align / Gym & Fitness Center
    • Dr. Mark Aylor, DC / Alternative Medicine Practice
    • Sigg Brothers Homes / Construction Company / General Contractor
    • POWER Advanced Health Center / Alternative Medicine Practice / Spa & Massage Center
    • Lice Clinics of America - Longmont / Medical Clinic

    Property Details for 421 21st Ave

    Year built
    1984
    Construction
    TYPE NOT SPECIFIED
    Lot size
    1.17 lot acres
    Property size
    20,664 SF
    Zone code
    2120
    Property type
    Office buildings
    APN
    1205-27-4-05-001
    APU
    120527405001

    Value Estimations

    based on Realmo’s proprietary methodology

    • Comparable approach

      Method
      Estimation
      AI Estimate
      $1,581,000
      Market price range: $1.57M - $5.26M

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

    Location Insight

    • Map
    • Local Demand
    City
    Longmont
    County
    Boulder
    State
    Colorado
    Longitude
    -105.1
    Latitude
    40.1953
    CBSA code
    14500
    CBSA name
    BOULDER, CO 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
    $59,097
    $140,923
    $493,802
    $634,725
    -
    $505,100
    $1,769,900
    $2,275,000

    Comparable in this City

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      3,089 SF

      448 Main St

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    • Value Estimation by Request
      2,442 SF

      420 Kimbark St

      OFFICE BUILDING • 2,442 SF
      420 Kimbark St, Longmont, CO 80501-5526
      View Details
    • Value Estimation by Request
      2,125 SF

      445 Main St

      OFFICE BUILDING • 2,125 SF
      445 Main St, Longmont, CO 80501-5534
      View Details
    • Value Estimation by Request
      2,342 SF

      760 Mtn Vw Ave

      OFFICE BUILDING • 2,342 SF
      760 Mtn Vw Ave, Longmont, CO 80501-2709
      View Details
    • Value Estimation
      $2,815,000
      13,835 SF

      9595 Nelson Rd

      OFFICE BUILDING • 13,835 SF
      9595 Nelson Rd, Longmont, CO 80501-6318
      View Details
    • Value Estimation by Request
      280 SF

      1128 Main St

      OFFICE BUILDING • 280 SF
      1128 Main St, Longmont, CO 80501-3823
      View Details

    Similar Nearby for Sale

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      View Details
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      Ground-Level Office/Retail Space Available

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      Prime Longmont Office Space - Vacant or Owner-Occupied
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    Similar Nearby for Lease

    • $16 SF/Yr
      6,411 SF

      Class A Office Space Available

      Upscale Longmont office building with modern amenities for rent.
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      31,920 SF

      Longmont Executive Office Space

      Modern Flex Space, 1,928 sq ft Available
      665 Frontage Rd, Longmont, CO 80501
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    • $15 SF/Yr
      24,600 SF

      Longmont Flex Space Available

      Prime Longmont flex space, multiple units.
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    • $13 SF/Yr
      3,663 SF

      Longmont Flex Office Space

      Prime Longmont location, updated office & workshop.
      105 Sunset St, Longmont, CO 80501
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    • Contact for pricing
      10,486 SF

      Longmont Office Suites for Lease

      Executive & Medical Office Space Available
      1446 Hover St, Longmont, CO 80501
      View Details
    • Contact for pricing
      8,364 SF

      North Longmont Office Suite Available

      337 SF office suite in desirable North Longmont location.
      2030 Terry St, Longmont, CO 80501
      View Details
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    421 21st Ave
    Longmont, CO 80501-1469
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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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