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    520 Nebraska St Sioux City, IA 51101

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    For Sale
    Contact for pricing

    Commercial - Sioux City, IA

    Property size:
    6,000 SF
    Lot size:
    0.52 Acres
    Days on Market:
    4
    Last Refresh:
    Jan 30 at 8:06 pm

    Property Features for 520 Nebraska St

    General Information

    Property type
    Commercial Sale
    Property subtype
    Other
    Standard status
    Active
    Zoning
    Commercial
    APN
    894728330001
    Size
    6,000 SF
    Lot size
    0.52 Acres

    Building Details

    Year built
    1913
    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 Jan 27, 2026

    MLS# 805756 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 Commercial Space Downtown

    Located on the corner of Nebraska and 6th Street in downtown Sioux City, this renovated historical property, the Bluebird, offers commercial space with convenient access to I-29. The property is within walking distance of Historic 4th Street, the Historic Pearl District, Hard Rock Casino and Hotel, and the Tyson Center. Tenant amenities include on-site parking and access to a fitness center. The property also features access to a 5th-floor community room and a rooftop terrace suitable for hosting networking and business events. Several options are available, ranging from 1,000 to 6,000 square feet. The property sits on a 0.52-acre lot. Note that historical restrictions apply to final design and layout. 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 with remodeling to begin in 2026.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Bluebird Flats Apartment Building Choices Counseling & Consulting Family Counselor Sioux Land Regional ... Housing Authority Accu Data Pro ... Private Investigator Commerce Building Professional Services

    Suggested Use

    Realty agency Restaurant Law Firm Spa & Massage Dental Office Hair Salon Nail Salon Building Supply Clothing Store Gym & Fitness

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

    Location Insight

    • Map
    • Local Demand
    City
    Sioux City
    County
    Woodbury
    State
    Iowa
    Longitude
    -96.403033
    Latitude
    42.496032

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    FAQs

    What type of property is this?
    Office space - Prime commercial space in renovated historical building, downtown Sioux City.
    Where is this office space located?
    The property is located at 520 Nebraska St Sioux City, IA.
    What are key features of this property?
    This property features: - Premier downtown location with easy access to amenities and I-29.; - On-site parking and access to a fitness center.; - Access to a 5th-floor community room and rooftop terrace for events.
    (712) 224-2300
    Request Owner's contact information
    520 Nebraska St Sioux City, IA 51101
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    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
    520 Nebraska St Sioux City, IA 51101
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    We can help!
    Listing Contact
    Jennifer Rose Bass
    Jennifer Rose Bass
    (712) 224-2300
    Learn more
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