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    Stunning Equestrian Property on 21+ Acres Title is generated by Realmo AI

    16218 NW MASON Rd, North Plains, OR 97133

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    Claim this Listing
    For Sale
    $1,650,000

    LAND - NorthPlains, OR

    Type:Single Family Residence
    Lot size:
    21.42 Acres
    Added:
    Jan 22, 2026
    Days on Market:
    108
    Last Refresh:
    May 10 at 1:06 am

    Property Features for 16218 NW MASON Rd

    General Information

    Property type
    Land
    Property subtype
    Single Family Residence
    Zoning
    AU-20
    Standard status
    Active
    APN
    R1090786
    Lot size
    21.42 Acres

    Taxes and HOA fees

    Tax Description
    ACRES 7.88, CODE SPLIT, POTENTIAL ADD'L TAX LIABILITY; SAV 12,760
    Tax Annual Amount
    1194

    Utilities

    Water front features
    Creek

    We can help!

    Listing Contact
    Jennifer Snodgrass

    Listing agent Jennifer Snodgrass License #201207536

    Listing office RE/MAX Equity Group 9790 SW Nimbus Ave, Portland, OR

    Listing date Jan 22, 2026

    MLS# 380928524 Listing URL

    Copyright © 2026 Regional Multiple Listing Services. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    HighLights

    • Approved building permit and new septic system/perc test allow immediate construction of a dream home.
    • Established equestrian facility featuring a 19‑stall barn, covered arena, outdoor arena, paddocks, and pastures.
    • This 21.42‑acre horse property is fully fenced and cross‑fenced.
    • New well installed in 2023 and electricity already in place at multiple locations.
    • Features 200 feet of Jackson Creek frontage and trails throughout the property.
    • Includes two 20' x 20' garages/workshops with power for equipment or hay storage.

    Overview

    This 21.42-acre horse property is located on Mason Hill Rd and is fully fenced and cross-fenced. Originally developed as a premier equestrian facility in 2019, the property includes 200 feet of Jackson Creek frontage. A finalized building permit for a future residence is in place with Washington County, and a new septic system and perc test have been approved. A new well was installed in 2023. Electricity has already been brought into multiple locations. The 42' x 140' barn features 19 stalls, with oversized 12x14 fully matted stalls, 10 of which have attached runs, plus a wash rack and paddocks. There are lush pastures for turnouts. A Tuff Shed serves as the tack room, and two 20' x 20' garages/workshops with power provide space for equipment or hay storage. The property includes a large 80' x 120' covered arena with sand footing, lights, and views of Mt. Hood and the surrounding area. There is also a second outdoor grass arena measuring 90'x180'. Trails wind through the property, down to the creek and around the perimeter, and there is also a trail course. The property borders BLM land and is next to a vineyard. The zoning is AU-20.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Horse & equestrian properties

    Map

    City
    North Plains
    County
    Washington
    State
    Oregon
    Longitude
    -122.992
    Latitude
    45.5974

    FAQs

    What type of property is this?
    Horse & equestrian property - Premier equestrian facility with building permit, barn, arena, and creek.
    Where is this horse & equestrian property located?
    The property is located at 16218 NW MASON Rd North Plains, OR.
    What is the asking price?
    The asking price for this property is $1,650,000.
    What are key features of this property?
    This property features: Approved building permit and new septic system/perc test allow immediate construction of a dream home.; Established equestrian facility featuring a 19‑stall barn, covered arena, outdoor arena, paddocks, and pastures.; This 21.42‑acre horse property is fully fenced and cross‑fenced.
    (503) 970-5036
    We can help!
    Listing Contact
    Jennifer Snodgrass
    Real Estate License ID: 201207536
    Learn More
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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
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    16218 NW MASON Rd, NorthPlains, OR 97133
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