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    501 Douglas St Sioux City, IA 51101

    Sponsored
    For Sale
    $499,000

    Commercial - Sioux City, IA

    Property size:
    4,875 SF
    Lot size:
    0.04 Acres
    Days on Market:
    15
    Last Refresh:
    Feb 27 at 2:06 pm

    Property Features for 501 Douglas St

    General Information

    Property type
    Commercial Sale
    Property subtype
    Other
    Standard status
    Active
    APN
    894728307009
    Size
    4,875 SF
    Lot size
    0.04 Acres

    Building Details

    Year built
    1919
    Floors in Building
    3
    Architectural style
    Other

    We can help!

    Listing Contact
    Jennifer Rose Bass
    Jennifer Rose Bass

    Century 21 ProLink (712) 224-2300

    Listing agent Jennifer Rose Bass (712) 224-2300

    Listing date Feb 13, 2026

    MLS# 827060 Listing URL

    Copyright © 2026 Northwest Iowa Regional Board of Realtors. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    Learn more

    Property Insight Report

    Overview

    Renovated Office Building in Sioux City

    Located in Sioux City, this three-story building, constructed in 1919, offers 4,875 square feet of space, with each floor comprising 1,625 square feet. The building, known as The Buffalo Building, features a mural named “Yawar Fiesta” on its west side. The property has undergone over $750,000 in renovations. The first floor includes an open work area or conference room, a kitchenette, and two restrooms. The second floor is designed with five private offices, an open work space, and a restroom. The third floor features a large conference room or work area, along with a restroom. Expansive windows and high ceilings contribute to an open atmosphere throughout the building. An unfinished basement spans the entire footprint, providing additional square footage. The property is situated on a lot of 0.04 acres. The ground floor spaces of this property may be eligible for the Sioux City Downtown Tenant Improvement Program, which provides financial assistance to help cover build out costs.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Office buildings

    Suggested Use

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

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

    Location Insight

    • Map
    • Local Demand
    City
    Sioux City
    County
    Woodbury
    State
    Iowa
    Longitude
    -96.406757
    Latitude
    42.495622

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    FAQs

    What type of property is this?
    Office building - Three-story office building with recent renovations and flexible floor plans.
    Where is this office building located?
    The property is located at 501 Douglas St Sioux City, IA.
    What is the asking price?
    The asking price for this property is $499,000.
    What are key features of this property?
    This property features: - Extensive recent renovations totaling over $750,000.; - Spacious 4,875 SF three-story building with 1,625 SF per floor.; - Prime location in Sioux City, known as The Buffalo Building with a distinctive mural.
    (712) 224-2300
    Request Owner's contact information
    501 Douglas St Sioux City, IA 51101
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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.

    More about this property
    501 Douglas St Sioux City, IA 51101
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    We can help!
    Listing Contact
    Jennifer Rose Bass
    Jennifer Rose Bass
    (712) 224-2300 (712) 266-5972
    Learn more
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