Add Listing
    For Sale
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    AI Search
    The Largest CRE Database in the US with Over 1 Million Listings

    316 21st Ave Longmont, CO 80501

    View on Map
    Claim this Listing
    Loading data...
    Loading data...
    Loading data...
    For Sale
    $750,000

    Four spacious units with in-unit laundry and attached garages.

    Type:Multifamily
    Added:
    Apr 3, 2026
    Days on Market:
    22
    Last Refresh:
    Apr 3 at 4:54 am

    Property Features for 316 21st Ave

    General Information

    Standard status
    Active
    Property subtype
    Multifamily

    We can help!

    Listing Contact
    David J. Bomgaars

    Listing agent David J. Bomgaars License #CO: FA100104456

    Listing office Denver Office

    Listing date Apr 3, 2026

    Source Marcusmillichap

    Displayed information is deemed reliable but is not guaranteed and should be independently verified.

    All listing content including descriptions, pricing, images are the copyrighted material of Denver Office

    Overview

    Longmont Four-Unit Investment Opportunity

    The property at 316 21st Ave in Longmont, CO, presents a four-unit investment opportunity. It features four spacious 2-bedroom units, each equipped with in-unit washer and dryer and attached garages. The property is suitable for an owner-user or an investor seeking a long-term, value-add asset. Garage parking and below-market rents offer avenues for income growth. The location is near Horizon Park, a retail center anchored by King Soopers, with co-tenants such as Dollar Tree, Planet Fitness, and Big Lots, benefiting from local consumer traffic and convenience. Longmont’s labor market is supported by expanding sectors such as retail, advanced manufacturing, and professional services, and major employers including Seagate and UC Health, strengthening the property’s investment profile.
    Location Intelligence

    Current Use by Public Records

    Quadplexes

    Suggested Use

    Law Firm Restaurant Real Estate Agency Spa & Massage Center Hair Salon Dental Office Nail Salon Food Market Grocery & Convenience Store Gym & Fitness Center

    Zoning and permitted uses should be independently verified with local authorities.

    Location Insight

    • Map
    • Local Demand
    City
    Longmont
    County
    Weld
    State
    Colorado
    Longitude
    -105.0983727
    Latitude
    40.196024

    Nearby Similar for Sale

    • $665,000
      3,761 SF

      Move-In Ready Home in Longmont

      Well-maintained 3-bedroom home in Spring Valley neighborhood.
      1750 Preston Dr, Longmont, CO 80504
      View Details
    • $605,000
      5,032 SF

      Longmont Duplex with Downtown Access

      Duplex near downtown Longmont with large yard and home warranty.
      1342 Terry St, Longmont, CO 80501
      View Details
    • $1,350,000

      Longmont Mixed-Use Redevelopment Opportunity

      Three-story brick building with redevelopment potential in Longmont, Colorado.
      24 9th Ave, Longmont, CO 80501
      View Details
    • $450,000

      Niwot Office Condo with Views

      Bright office condo in Niwot with mountain views and fireplaces.
      7102 La Vista Pl, Longmont, CO 80503
      View Details
    • $899,000
      4,218 SF

      Freestanding Industrial Building in Longmont

      4,218 SF industrial building on 0.25 acre lot.
      104 9th, Longmont, CO 80501
      View Details
    • $670,000
      2,236 SF

      Longmont Duplex: Turnkey Investment Opportunity

      Well-maintained duplex in central Longmont, ideal for investors or owner-occupants.
      318 4th Ave, Longmont, CO 80501
      View Details
    • $485,000
      4,736 SF

      Longmont Corner Site Near Hospital

      0.32-acre MU-N zoned site near Longmont United Hospital.
      1350 Stuart, Longmont, CO 80501
      View Details
    • $525,000

      Established Car Wash on Corner Lot

      Turnkey car wash business and real estate in Longmont, Colorado.
      390 Pratt Street, Longmont, CO 80501
      View Details
    • $800,000
      3,186 SF

      Longmont Multifamily Property with Units

      Four-unit multifamily property in Longmont with off-street parking.
      832 S Bowen St, Longmont, CO 80501
      View Details
    • $485,000
      4,736 SF

      Longmont Medical Office Redevelopment Opportunity

      4,736 SF medical office building for sale in Longmont.
      1350 Stuart Street, Longmont, CO 80501
      View Details
    • $1,200,000
      4,452 SF

      Longmont Standalone Office Building For Sale

      Well-maintained office building in Longmont with ample parking.
      2020 Terry Street, Longmont, CO 80501
      View Details
    • $1,850,000
      6,222 SF

      Medical Office Building For Sale

      Freestanding medical office building in Longmont, Colorado.
      1818 Mountain View Avenue, Longmont, CO, 80501
      View Details

    FAQs

    What type of property is this?
    Quadplex - Four spacious units with in-unit laundry and attached garages.
    Where is this quadplex located?
    The property is located at 316 21st Ave Longmont, CO.
    What is the asking price?
    The asking price for this property is $750,000.
    What are key features of this property?
    This property features: Four spacious 2‑bedroom units, each with **in‑unit washer and dryer**.; **Attached garages** for each unit.; Value‑add opportunity with below‑market rents.
    (303) 328-2069
    We can help!
    Listing Contact
    David J. Bomgaars
    Real Estate License ID: CO: FA100104456
    Learn More
    Request Owner's contact information
    Message sent successfully
    Error
    If you are the owner or broker of this property and would like to edit or remove this listing please send a message to web site administrator.
    Message sent successfully
    Error
    Email to Your Friends
    Link copied to clipboard
    Separate multiple addresses with a comma
    Message sent successfully
    Error

    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
    Thanks! Your message was sent.
    Error! Your message wasn't sent.
    Please enter your name
    Please enter email
    Please enter the email in the correct format
    Please enter phone
    Please enter the number in the correct format
    Please enter message
    Thank You

    You are Unsubscribed From Notifications

    Google sign-in failed. Please try again or use another login method.
    Sign Up Successful!
    You now have access to more from Realmo!