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    Property profile & analytics

    3685 121st Ave Thornton, CO 80241-3585

    • Warehouses
    • 757 SF
    • 4.51 lot acres
    OFF-MARKET
    Value Estimation
    Last Sale
    Sep 28, 2021
    Location Intelligence
    Property ID
    US13-0992382
    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

    • Warehouses

    Property Details for 3685 121st Ave

    Year built
    2005
    Lot size
    4.51 lot acres
    Property size
    757 SF
    Property type
    Warehouses
    Property subtype
    Self storage facilities
    APN
    R0161412
    APU
    R0161412

    Value Estimation

    Powered by Realmo proprietary methodology Last update: July 3, 2025

    • CAP approach

    • Comparable approach

    • Alternative Use

    Location Insight

    • Map
    • Local Demand
    City
    Thornton
    County
    Adams
    State
    Colorado
    Longitude
    -104.944
    Latitude
    39.9175
    CBSA code
    19740
    CBSA name
    DENVER-AURORA, 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
    $130,633
    $548,610
    $1,151,750
    $1,700,360
    -
    $1,966,360
    $2,283,640
    $4,250,000

    Comparable in this City

    • Value Estimation by Request
      73,725 SF

      12298 Pennsylvania St

      MINI-WAREHOUSE, STORAGE • 73,725 SF
      12298 Pennsylvania St, Thornton, CO 80241-3114
      View Details
    • Value Estimation by Request
      2,400 SF

      4215 128th Ave

      MINI-WAREHOUSE, STORAGE • 2,400 SF
      4215 128th Ave, Thornton, CO 80241-2227
      View Details
    • Value Estimation by Request
      59,711 SF

      451-491 124Th Ave

      Manufacturing properties • 59,711 SF
      451-491 124Th Ave, Thornton, CO 80241
      View Details
    • Value Estimation by Request
      59,711 SF

      451-491 124Th Ave

      Distribution properties • 59,711 SF
      451-491 124Th Ave, Thornton, CO 80241
      View Details
    • Value Estimation by Request
      84,000 SF

      12520 Grant Dr

      DISTRIBUTION WAREHOUSE • 84,000 SF
      12520 Grant Dr, Thornton, CO 80241-2504
      View Details
    • Value Estimation
      $6,100,000
      130,910 SF

      12300 Grant St

      DISTRIBUTION WAREHOUSE • 130,910 SF
      12300 Grant St, Thornton, CO 80241-3805
      View Details

    Similar Nearby for Sale

    • $1,100,000
      2.01 Acres

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      2.01-acre industrial land, prime location.
      12176 Grant Cir, Thornton, CO 80241
      View Details
    • $395,000
      1,069 SF

      Charming Condo in Prime Location

      2-bedroom, 2-bathroom condo in Thornton with easy access to Denver.
      12901 Grant Cir W, Denver, CO 80241
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    • $2,199,000

      Eastlake Acreage with Ranch Home

      5.431-acre property with a small ranch-style home in Eastlake.
      3225 E 124Th Ave, Thornton, CO 80241
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    • $365,000
      1,263 SF

      Move-In Ready Townhome with Amenities

      Three-bedroom, two-bath townhome with community pool and hot tub.
      12931 Lafayette St, Denver, CO 80241
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    • $999,999

      Land For Sale

      Land available in a perfect location.
      128 128Th Ave, Thornton, CO 80241
      View Details

    Similar Nearby for Lease

    • Contact for pricing
      118,422 SF

      North Washington Commerce Center Space

      Modern Thornton warehouse space for lease.
      1101 126Th Ave, Thornton, CO 80241
      View Details
    • Contact for pricing
      86,814 SF

      Thornton Retail Pad Site Investment

      High-traffic location, prime retail pad.
      12090 Colorado Blvd, Thornton, CO 80241
      View Details
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    3685 121st Ave
    Thornton, CO 80241-3585
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    Realmo Value Estimation

    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.

    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.

    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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