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    • Price cut: $10K (5/27)
    $665,000

    5121 Mt Arapaho Circle, Longmont, CO 80504

    4beds
    4,032sqft
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    Single Family Residence
    Built in 2000
    6,821 Square Feet Lot
    $659,300 Zestimate®
    $165/sqft
    $11/mo HOA

    What's special

    Charming low-maintenance turf yardConvenient half bathPrivate entranceSpacious primary suiteTwo expansive loft spacesTwo additional bedroomsBright kitchen
    Welcome to 5121 Mt. Arapahoe Circle in Longmont—a versatile and thoughtfully updated home perfect for multi-generational living, savvy home hackers, or anyone seeking flexible space and income potential. One of the standout features is the newly renovated attached basement apartment, complete with its own private entrance and a charming, low-maintenance turf yard—ideal for guests, tenants, or extended family. Whether you’re offsetting your mortgage or creating a private retreat, this setup opens the door to endless possibilities. The main level offers comfortable and functional living with a spacious primary suite, convenient half bath, dedicated dining room, bright kitchen, cozy living room, office space, and a laundry room for everyday ease. Upstairs, you’ll find two expansive loft spaces—perfect for a home office, playroom, or additional living areas—along with two additional bedrooms and a full bathroom. Outside, enjoy Colorado living at its best with a beautifully designed patio and garden area, plus a large covered front porch that faces a peaceful park—perfect for morning coffee or evening unwinding. A detached three-car garage provides ample space for vehicles, storage, or hobbies. This home has been well cared for with many updates, including new windows and durable luxury vinyl plank flooring throughout, blending style with functionality. A rare opportunity to own a home that truly adapts to your lifestyle—whether you're investing, expanding, or simply settling in.
    88 days
    |
    659
    |
    36
    |

    Zillow last checked:

    Listing updated:

    Listed by:

    Elyse Anderson 303-435-4487 elyse@thekey.team,

    Key Team Real Estate Corp.,

    Daniela Moler 720-839-0057,

    Key Team Real Estate Corp.

    Source: REcolorado as distributed by MLS GRID,MLS#: 4174350MLS Logo

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 4
      • Bathrooms: 4
      • Full bathrooms: 3
      • 1/2 bathrooms: 1
      • Main level bathrooms: 2
      • Main level bedrooms: 1
      Bedroom
      • Features: Primary Suite
      • Level: Main
      Bedroom
      • Level: Upper
      Bedroom
      • Level: Upper
      Bedroom
      • Level: Basement
      Bathroom
      • Features: En Suite Bathroom, Primary Suite
      • Level: Main
      Bathroom
      • Level: Upper
      Bathroom
      • Level: Main
      Bathroom
      • Level: Basement
      Dining room
      • Level: Main
      Dining room
      • Level: Basement
      Kitchen
      • Level: Main
      Kitchen
      • Level: Basement
      Laundry
      • Level: Main
      Living room
      • Level: Main
      Living room
      • Level: Basement
      Loft
      • Level: Upper
      Loft
      • Level: Upper
      Office
      • Level: Main
      Heating
      • Forced Air
      Cooling
      • Central Air
      Appliances
      • Included: Dishwasher, Disposal, Dryer, Microwave, Oven, Refrigerator, Washer
      Features
      • Eat-in Kitchen, Five Piece Bath, Kitchen Island, Open Floorplan, Primary Suite
      • Flooring: Carpet, Tile, Vinyl
      • Windows: Double Pane Windows
      • Basement: Exterior Entry,Finished,Walk-Out Access
      • Number of fireplaces: 1
      • Fireplace features: Gas, Living Room
      Interior area
      • Total structure area: 4,032
      • Total interior livable area: 4,032 sqft
      • Finished area above ground: 2,576
      • Finished area below ground: 1,456
      Video & virtual tour

      Property

      Parking
      • Total spaces: 3
      • Parking features: Carport
      • Carport spaces: 3
      Features
      • Levels: Two
      • Stories: 2
      • Patio & porch: Covered, Front Porch, Patio
      • Exterior features: Garden, Private Yard, Rain Gutters
      • Fencing: Full
      Lot
      • Size: 6,821 Square Feet
      • Features: Corner Lot, Many Trees, Sprinklers In Front, Sprinklers In Rear
      Details
      • Parcel number: R8308100
      • Special conditions: Standard

      Construction

      Type & style
      • Home type: SingleFamily
      • Property subtype: Single Family Residence
      Materials
      • Frame, Wood Siding
      • Roof: Composition
      Condition
      • Updated/Remodeled
      • Year built: 2000

      Utilities & green energy

      • Sewer: Public Sewer
      • Water: Public
      • Utilities for property: Electricity Connected, Natural Gas Connected

      Community & HOA

      Community
      • Security: Carbon Monoxide Detector(s), Smoke Detector(s), Video Doorbell
      • Subdivision: Summit View Estates
      HOA
      • Has HOA: Yes
      • Amenities included: Park, Playground
      • HOA fee: $135 annually
      • HOA name: Flagstaff Property Management
      • HOA phone: 303-682-0098
      Location
      • Region: Frederick

      Financial & listing details

      • Price per square foot: $165/sqft
      • Tax assessed value: $673,073
      • Annual tax amount: $4,524
      • Date on market: 4/23/2026
      • Listing terms: Cash,Conventional,FHA,VA Loan
      • Exclusions: Seller's Personal Property
      • Ownership: Individual
      • Electric utility on property: Yes
      • Road surface type: Paved

        Estimated market value

        $659,300

        $626,000 - $692,000

        $3,367/mo

        Price history

        DateEventPrice
        7/15/2026Pending sale$665,000$165/sqft
        Source: REcolorado as distributed by MLS GRID #4174350 Report a problem
        5/27/2026Price change$665,000-1.5%$165/sqft
        Source: REcolorado as distributed by MLS GRID #4174350 Report a problem
        4/23/2026Listed for sale$675,000+11%$167/sqft
        Source: REcolorado as distributed by MLS GRID #4174350 Report a problem
        2/1/2024Sold$608,000+1.3%$151/sqft
        Source: REcolorado as distributed by MLS GRID #6909765 Report a problem
        12/21/2023Pending sale$600,000$149/sqft
        Source: REcolorado as distributed by MLS GRID #6909765 Report a problem
        12/16/2023Price change$600,000-3.2%$149/sqft
        Source: REcolorado as distributed by MLS GRID #6909765 Report a problem
        10/16/2023Listed for sale$620,000+77.1%$154/sqft
        Source: REcolorado as distributed by MLS GRID #6909765 Report a problem
        5/19/2014Sold$350,000-12.5%$87/sqft
        Source: Public Record Report a problem
        4/11/2014Pending sale$399,900$99/sqft
        Source: RE/MAX MASTERS INC #6631944 Report a problem
        3/27/2014Listed for sale$399,900+45%$99/sqft
        Source: RE/MAX MASTERS INC #6631944 Report a problem
        11/3/2000Sold$275,825$68/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2026$4,524 +9.1%$41,200 -2.1%
        2025$4,145 +4.5%$42,070 -7%
        2024$3,968 +14.3%$45,250 -1%
        2023$3,470 -0.9%$45,690 +31.6%
        2022$3,501 +6.8%$34,730 -2.8%
        2021$3,280 $35,730 +5.9%
        2020$3,280 +19.4%$33,750
        2019$2,748 -17.5%$33,750 +16.3%
        2018$3,330 +21.2%$29,010
        2017$2,748 -0.9%$29,010 +13.9%
        2016$2,773 +16.7%$25,470
        2015$2,375 +33.9%$25,470 +33.8%
        2014$1,774 $19,030
        2013-- $19,030 -8.6%
        2012-- $20,820
        2011-- $20,820 +8.2%
        2010-- $19,240
        2009-- $19,240 -19.1%
        2008-- $23,790
        2007-- $23,790 +2.1%
        2006-- $23,290
        2005-- $23,290 +4.2%
        2004-- $22,360 -1%
        2003-- $22,580 +8.8%
        2002-- $20,750
        Find assessor info on the county website

        Monthly payment

        Est. payment

        Payment breakdown

        Explore the cost of this home by adjusting the details. Changes won't be saved.
        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.
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        Climate risks

        Neighborhood: 80504

        Getting around

        12 / 100
        Car-Dependent
        28 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating
        Schools provided by the listing agent
        • Elementary: Legacy
        • Middle: Coal Ridge
        • High: Frederick
        • District: St. Vrain Valley RE-1J

        Source: REcolorado as distributed by MLS GRID. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.

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