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    Sioux Falls Ranch Duplex Title is generated by Realmo AI

    3609 & 3611 E 18th St, Sioux Falls, SD 57103

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    For Sale
    $369,900

    MULTI_FAMILY - Sioux Falls, SD

    Property size:
    2,280 SF
    Lot size:
    0.20 Acres
    Price / SF:
    $162/SF
    Added:
    Jan 1, 2026
    Days on Market:
    153
    Last Refresh:
    Jun 3 at 5:06 pm

    Property Features for 3609 & 3611 E 18th St

    General Information

    Property type
    Residential Multi Family
    Property subtype
    Other
    Zoning
    Not Verified
    Rooms
    Basement
    Appliances
    Dishwasher, Range, Refrigerator
    Standard status
    Active
    APN
    26238
    Size
    2,280 SF
    Lot size
    0.20 Acres

    Taxes and HOA fees

    Tax Description
    Lot 3 Block 1- Bergs Addition
    Tax Annual Amount
    3484

    Utilities

    Sewer type
    Public Sewer
    Heating system
    Natural Gas, Forced Air
    Cooling system
    Electric
    Water source
    Public

    Building Details

    Year built
    1969
    Floors in Building
    1
    Number of units
    2
    Flooring type
    Vinyl, Carpet, Wood
    Building materials
    Stucco
    Roof type
    Composition

    We can help!

    Listing Contact
    Zack Winter

    Listing agent Zack Winter

    Listing office Keller Williams Realty Sioux Falls 6300 S Connie Avenue, Sioux Falls, SD

    Listing date Jan 1, 2026

    MLS# 22600009 Listing URL

    Copyright © 2026 Realtor Association of the Sioux Empire MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    HighLights

    • Side‑by‑side ranch duplex built in 1969 in the Hilltop area
    • Both units are newly remodeled with newer windows, updated bathroom and kitchen
    • Unit 1: 2 bed, 1 bath with a finished basement plus an additional non‑legal bedroom
    • Unit 1 has potential to add a second bath
    • Unit 2: 2 bed, 1 bath with potential for a finished basement
    • Utilities and systems: public water and public sewer; natural gas forced‑air heat; electric cooling; composition roof

    Overview

    This side-by-side ranch duplex is located in the Hilltop Area of Sioux Falls, South Dakota. The property is an income-producing asset. Each unit has been remodeled with newer windows, bathrooms, and kitchens. Unit one features 2 bedrooms and 1 bathroom with a finished basement that includes an additional non-legal bedroom and potential for a second bathroom. Unit two also has 2 bedrooms and 1 bathroom, with potential for a finished basement. The property size is 2280 square feet and the lot size is approximately 0.1951 acres.

    Local Financial Insights For Multifamily LT 5

    Simulate Cap Rate and NOI

    NOI Build-Up
    Vacancy
    income lost from leasable area expected to sit empty during the year — subtracted from gross rent.
    EGI (Effective Gross Income)
    gross rent minus vacancy losses — the realistic income before paying operating costs.
    OpEx (Operating Expenses)
    recurring costs to operate the property (property tax, insurance, utilities, maintenance, management) — excludes financing and capital improvements.
    NOI (Net Operating Income)
    income a property generates after operating costs but before financing and taxes.

    Component $ $/SF
    Gross rent $31.5k $13.80
    − Vacancy −$3.0k −$1.33
    EGI $28.4k $12.47
    − OpEx −$8.5k −$3.74
    NOI $19.9k $8.73
    2,280 SF · lease $13.80/SF/yr · vacancy 9.63% · expense 30.00%

    Alternative Uses

    Best Use
    Multifamily LT 5
    $284.3K
    $248.8K – $331.7K (±1% cap)
    NOI $19,904 @ 7.0% cap · market cap 5.38%
    Second Best
    Apartment 5plus
    $260.8K
    $228.2K – $304.3K (±1% cap)
    NOI $18,255 @ 7.0% cap · market cap 4.94%
    Theoretical Best
    Office A
    $619.1K
    $541.7K – $722.3K (±1% cap)
    NOI $43,338 @ 7.0% cap · market cap 11.72%
    Zoning and permitted uses should be independently verified with local authorities.
    Property Profile Location Intelligence

    Current Use by Public Records

    Spikesdev Electronics & Wireless Store

    Suggested Use

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

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

    Location Insight

    • Map
    • Local Demand
    City
    Sioux Falls
    County
    Lincoln
    State
    South Dakota
    Longitude
    -96.680544
    Latitude
    43.536471

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    FAQs

    What type of property is this?
    Duplex - Income-producing duplex in Hilltop Area, Sioux Falls.
    Where is this duplex located?
    The property is located at 3609 & 3611 E 18th St Sioux Falls, SD.
    What is the asking price?
    The asking price for this property is $369,900.
    What are key features of this property?
    This property features: Side‑by‑side ranch duplex built in 1969 in the Hilltop area; Both units are newly remodeled with newer windows, updated bathroom and kitchen; Unit 1: 2 bed, 1 bath with a finished basement plus an additional non‑legal bedroom
    (605) 275-0555
    We can help!
    Listing Contact
    Zack Winter
    Request Owner's contact information
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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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