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    Sun Prairie Duplex For Sale Title is generated by Realmo AI

    903 Clarmar Drive, Sun Prairie, WI 53590

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    Updated duplex in Sun Prairie, WI. One unit vacant.

    Type:Multifamily
    Property size:
    2,500 SF
    Price / SF:
    $239/SF
    Added:
    Mar 9, 2026
    Days on Market:
    65
    Last Refresh:
    Mar 19 at 10:18 pm

    Property Features for 903 Clarmar Drive

    General Information

    Standard status
    Active
    Size
    2,500 SF
    Property subtype
    Multifamily

    Building Details

    Year Built
    1990

    We can help!

    Listing Contact
    Jim Stopple

    Listing agent Jim Stopple License #WI 90-12003

    Listing office Madison Property Management, Inc

    Listing date Mar 9, 2026

    Source Crexi

    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 Madison Property Management, Inc

    HighLights

    • Vacant unit at 1631 Octono Dr. allows for immediate occupancy or setting your own rental rate.
    • Existing lease on the other unit at 903 Clarmar Dr. provides immediate income at $1,890/month until 6/30/2026.
    • Recently updated units enhance appeal and reduce immediate maintenance costs.
    • Each unit has a private patio and attached 2‑car garage.
    • Separately metered gas, electric, and water/sewer for each unit simplifies management and billing.
    • The 1631 Octono Dr. unit offers 3 bedrooms and 1,300 sq. ft.

    Overview

    This duplex, constructed in 1990, is located at the corner of Clarmar Drive and Oconto Drive in Sun Prairie, Wisconsin. One of the units, located at 1631 Oconto Drive, is currently vacant. Both units have been recently updated. One unit, located at 903 Clarmar Drive, features 1,200 square feet of living space with 2 bedrooms, 1 full bath, 1 half bath, an unfinished basement, a private patio, and an attached 2-car garage. This unit is currently leased for $1,890 per month until June 30, 2026. The other unit, located at 1631 Oconto Drive, offers 1,300 square feet of living space with 3 bedrooms, 1 full bath, 1 half bath, an unfinished basement, a private patio, and an attached 2-car garage. Each unit has separate gas, electric, and water/sewer meters.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Duplexes

    Suggested Use

    Law Firm Real Estate Agency Restaurant Spa & Massage Center Dental Office Hair Salon Nail Salon Building Supply Gym & Fitness Center Daycare Center

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

    Location Insight

    • Map
    • Local Demand
    City
    Sun Prairie
    County
    Dane
    State
    Wisconsin
    Longitude
    -89.2413986
    Latitude
    43.1707492

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    FAQs

    What type of property is this?
    Duplex - Updated duplex in Sun Prairie, WI. One unit vacant.
    Where is this duplex located?
    The property is located at 903 Clarmar Drive Sun Prairie, WI.
    What is the asking price?
    The asking price for this property is $599,900.
    What are key features of this property?
    This property features: Vacant unit at 1631 Octono Dr. allows for immediate occupancy or setting your own rental rate.; Existing lease on the other unit at 903 Clarmar Dr. provides immediate income at $1,890/month until 6/30/2026.; Recently updated units enhance appeal and reduce immediate maintenance costs.
    We can help!
    Contact for Pricing
    Please call us for current price
    and status of this listing
    Jim Stopple
    Real Estate License ID: WI 90-12003
    Learn More
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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.

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