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    423 Woodlawn Ave O Fallon, MO 63366

    View on Map
    Sponsored
    For Sale
    Pending
    $259,000

    Office - O'Fallon, MO

    Type:Office
    Property size:
    6,466 SF
    Lot size:
    0.45 Acres
    Days on Market:
    24
    Last Refresh:
    Mar 7 at 1:06 am

    Property Features for 423 Woodlawn Ave

    General Information

    Property type
    Commercial Sale
    Property subtype
    Office
    Standard status
    Pending
    APN
    2-057A-S029-00-0102.2000000
    Parking
    15
    Size
    6,466 SF
    Lot size
    0.45 Acres

    Utilities

    Heating system
    Ductless (Heating)
    Cooling system
    Ductless

    Building Details

    Year built
    1951
    Flooring type
    Carpet
    Building materials
    Vinyl Siding
    Architectural style
    Other

    We can help!

    Listing Contact
    Lisa Adkins
    Lisa Adkins

    RE/MAX Platinum (636) 980-8200

    Listing agent Lisa Adkins (636) 980-8200 License #1999144168

    Listing date Feb 12, 2026

    MLS# 25044570 Listing URL

    Copyright © 2026 MARIS. 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

    O'Fallon Office with Apartment

    This well-maintained commercial building is located on high traffic Woodlawn Avenue near Main St., Highway K and Highway 70. The property is suitable for numerous professional office uses. The building includes a second floor, two-bedroom apartment for additional income. Currently configured with six large offices, including an extra-large Admin office, kitchen, reception area, and restroom, the property could also be converted to residential use or operate as a multi-unit building. The asphalt paved parking lot and grounds are landscaped and maintained. Access to all O’Fallon utilities is available. The property has a lot size of 0.45 acres and a building size of 6466 square feet. A new roof and siding were installed in 2024. The property is located in O'Fallon, MO.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Woodlawn Law Offices Law Firm William N. Seibel ... Law Firm Boeckman Daniel V Law Firm Debt Relief Law ... Law Firm

    Suggested Use

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

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

    Location Insight

    • Map
    • Local Demand
    City
    O Fallon
    County
    St. Charles
    State
    Missouri
    Longitude
    -90.705289
    Latitude
    38.805437

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    FAQs

    What type of property is this?
    Office building - Well-maintained office building with apartment near major highways.
    Where is this office building located?
    The property is located at 423 Woodlawn Ave O Fallon, MO.
    What is the asking price?
    The asking price for this property is $259,000.
    What are key features of this property?
    This property features: - New roof and siding installed in 2024.; - Two-bedroom apartment on the second floor for additional income.; - Suitable for professional office use, residential conversion, or multi-unit operation.
    (314) 324-6219
    Request Owner's contact information
    423 Woodlawn Ave O Fallon, MO 63366
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    O Fallon, MO 63366
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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
    423 Woodlawn Ave O Fallon, MO 63366
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    We can help!
    Listing Contact
    Lisa Adkins
    Lisa Adkins
    Real Estate License ID: 1999144168
    (314) 324-6219 (636) 980-8200 (336) 878-7562
    Learn more
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