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    The Largest CRE Database in the US with Over 1 Million Listings

    1605 Us Highway 181, Unit F Portland, TX 78374

    Sponsored
    For Lease
    $3,500 /Mo ($16 SF/Yr)

    COMMERCIAL - Portland, TX

    Type:Office
    Property size:
    2,567 SF
    Lot size:
    0.48 Acres
    Days on Market:
    8
    Last Refresh:
    Feb 18 at 10:06 am

    Property Features for 1605 Us Highway 181

    General Information

    Property type
    Commercial Lease
    Property subtype
    Office
    Standard status
    Active
    Rooms
    Bathroom 1
    Bathrooms
    1
    APN
    1046118
    Parking
    24
    Exterior features
    Landscaping
    Accessibility
    Accessible Approach with Ramp
    Size
    2,567 SF
    Lot size
    0.48 Acres

    Utilities

    Heating system
    Electric (Heating), Central
    Cooling system
    Central Air

    Building Details

    Year built
    2002
    Floors in Building
    1
    Flooring type
    Concrete, Carpet
    Building materials
    Concrete

    We can help!

    Listing Contact
    Brenton Reagan
    Brenton Reagan

    Cass Real Estate (361) 643-2662

    Listing agent Brenton Reagan (512) 736-2695 License #0669077

    Listing date Feb 11, 2026

    MLS# 468397

    Copyright © 2026 South Texas Multiple Listing Service, LLC. 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

    Spacious Highway-Adjacent Commercial Space

    This commercial space, formerly a Post Net location, offers 2567 square feet of open area suitable for various business needs. Located right off the highway, the unit provides good parking and potential for customization. The space can remain as one large open area or be built out with divider walls to create smaller rooms. A side room previously used as a break room could be repurposed for storage, IT, or office space. Additionally, there is a side room with a divider wall that could function as a reception or copy/work area. The unit is located in Portland, TX. There are no NNN fees for this unit; however, there will be an assessment for electrical usage. There is currently no water running directly to this unit; common restrooms are available in the adjoining hallway. The property is situated on a 0.48-acre lot.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Office space

    Suggested Use

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

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

    Location Insight

    • Map
    • Local Demand
    City
    Portland
    County
    San Patricio
    State
    Texas
    Longitude
    -97.313935
    Latitude
    27.889443

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    FAQs

    What type of property is this?
    Office space - Large, open commercial space with highway access and ample parking.
    Where is this office space located?
    The property is located at 1605 Us Highway 181, Unit F Portland, TX.
    What is the lease rate?
    The lease rate is $16 SF/Yr.
    What are key features of this property?
    This property features: - **Large open space: 2567 SF**; - Highway access and good parking; - No NNN fees
    (512) 736-2695
    Request Owner's contact information
    1605 Us Highway 181, Unit F Portland, TX 78374
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    Portland, TX 78374
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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
    1605 Us Highway 181, Unit F Portland, TX 78374
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    We can help!
    Listing Contact
    Brenton Reagan
    Brenton Reagan
    Real Estate License ID: 0669077
    (512) 736-2695 (817) 795-2500 (361) 643-2662
    Learn more
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