Sign Up Successful!
You now have access to more from Realmo!
Property Lookup
    Property Lookup
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    AI Search
    Back to Search
    The Largest CRE Database in the US with Over 1 Million Listings
    Property profile & analytics

    4100 Cass Ave Westmont, IL 60559-1312

    • Commercial real estate
    • 4,912 SF
    • 0.28 lot acres
    OFF-MARKET
    Last Sale
    May 05, 2025
    $675,000
    Value Estimations
    $710,000
    Show details
    Cap Rate Potential
    Location Intelligence
    Property ID
    US28-3420873
    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

    • G & S Service, Inc. / HVAC Service / General Contractor

    Property Details for 4100 Cass Ave

    Year built
    1953
    Lot size
    0.28 lot acres
    Property size
    4,912 SF
    Zone code
    C
    Property type
    Commercial real estate
    APN
    09-04-222-025
    APU
    904222025

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

      Method
      Estimation
      Statistic approach
      $815,000
      ML approach
      $825,000

    • Comparable approach

      Method
      Estimation
      Statistic Estimate
      $551,000
      Market price range: $552k - $1.25M

    • Alternative Use

      Use
      Estimation
      COMMERCIAL (GENERAL)
      $895,000
      Current use
      MEDICAL BUILDING
      $1,105,000
      Change: +24% Conversion: Easy
      RETAIL STORES
      $1,060,000
      Change: +19% Conversion: Easy
      OFFICE BUILDING
      $880,000
      Change: -1% Conversion: Easy

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

    Location Insight

    • Map
    • Local Demand
    City
    Westmont
    County
    Dupage
    State
    Illinois
    Longitude
    -87.9764
    Latitude
    41.8121
    CBSA code
    16980
    CBSA name
    CHICAGO-NAPERVILLE-JOLIET, IL-IN-WI 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
    $8,226
    $40,270
    $82,300
    $122,570
    -
    $120,810
    $246,900
    $367,710

    Comparable in this City

    • Value Estimation by Request
      270 SF

      150 63rd St

      COMMERCIAL (GENERAL) • 270 SF
      150 63rd St, Westmont, IL 60559-2614
      View Details
    • Value Estimation by Request
      474 SF

      414 Plz Dr Ste, Unit 102

      COMMERCIAL CONDOMINUIM • 474 SF
      414 Plz Dr Ste, Westmont, IL 60559-5506
      View Details
    • Value Estimation by Request
      4,320 SF

      218 Cass Ave

      COMMERCIAL (GENERAL) • 4,320 SF
      218 Cass Ave, Westmont, IL 60559-1706
      View Details
    • Value Estimation
      $525,000
      328 SF

      665 Pasquinelli Dr Ste B

      COMMERCIAL CONDOMINUIM • 328 SF
      665 Pasquinelli Dr Ste B, Westmont, IL 60559-1284
      View Details
    • Value Estimation by Request
      688 SF

      665 Pasquinelli Dr Ste B

      COMMERCIAL CONDOMINUIM • 688 SF
      665 Pasquinelli Dr Ste B, Westmont, IL 60559-1284
      View Details
    • Value Estimation by Request
      702 SF

      665 Pasquinelli Dr Ste B

      COMMERCIAL CONDOMINUIM • 702 SF
      665 Pasquinelli Dr Ste B, Westmont, IL 60559-1284
      View Details

    Similar Nearby for Sale

    • Contact for pricing

      Prime Westmont Commercial Land

      ½ Acre Lot, Cass Ave, High Visibility
      303 Cass Ave, Westmont, IL 60559
      View Details
    • $1,100,000
      2,450 SF

      Westmont Commercial Building For Sale

      High-visibility building, ample parking, prime location.
      301 Cass Ave, Westmont, IL 60559
      View Details
    • Contact for pricing
      1.79 Acres

      Westmont Commercial Land - 1.79 Acres

      Prime Westmont commercial lot, high visibility.
      6120 Cass Ave, Westmont, IL 60559
      View Details
    • $1,600,000
      9,256 SF

      Westmont Commercial Building - Prime Location

      Former bank, high-traffic area, remodel started. Huge potential!
      6125 Cass Ave, Westmont, IL 60559
      View Details
    • $1,100,000
      2,450 SF

      Westmont Retail Space - Prime Location

      High-Visibility Retail Building, Vacant, 2,450 SF
      301 Cass Ave, Westmont, IL 60559
      View Details
    • Contact for pricing
      59,904 SF

      Westmont Multi-Tenant Office Complex

      Three-building office complex with remodeled units and ample parking.
      825 N Cass Ave, Westmont, IL 60559
      View Details

    Similar Nearby for Lease

    • $13 SF/Yr
      110,294 SF

      Westmont Office Park Investment

      Class B Office Space, IL, 110K+ SF
      740 Pasquinelli Dr, Westmont, IL 60559
      View Details
    • Contact for pricing
      3,105 SF

      Retail Space on Cass Avenue

      Retail space available in Westmont on busy Cass Avenue.
      6372-6394 S Cass Ave, Westmont, IL 60559
      View Details
    • $13 SF/Yr
      4,011 SF

      Westmont Office Space For Rent

      Single-story office space with private entrances and controlled HVAC.
      770 Pasquinelli Dr, Westmont, IL 60559
      View Details
    • $24 SF/Yr
      118,000 SF

      Oakmont Plaza Office Suites

      Westmont, IL Class A Office Space
      999 Oakmont Plaza Dr, Westmont, IL 60559
      View Details
    • Contact for pricing
      2,184 SF

      Renovated Office Space Available

      High-class, professionally managed office suites for lease.
      700 E Ogden Ave, Westmont, IL 60559
      View Details
    • Contact for pricing
      1,121 SF

      Retail Space on Cass Avenue

      Retail space available in Westmont, high-visibility location.
      6344-6356 S Cass Ave, Westmont, IL 60559
      View Details
    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.
    4100 Cass Ave
    Westmont, IL 60559-1312
    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.