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Oregon Regional Real Estate Valuation Data
Data Science and Analytics
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About
Assessor data for properties in the Portland metropolitan area, specifically covering Multnomah, Clackamas, and Washington Counties. The raw, uncleaned data was scraped from the Portland Maps API. It offers critical information for real estate analysis, including assessed property value, sales price, sales dates, ownership details, and associated geospatial information. This data resource is useful for tracking historical property trends and performing valuation studies.
Columns
The dataset contains 25 distinct columns detailing property information:
- address, city, state, zip_code, zip_code_string, county, neighborhood: Geographic identifiers and location details. Multnomah is the most frequent county, and PORTLAND is the most common city.
- property_id, state_id, parent_state_id, alt_account_number: Unique property identifiers.
- owner, legal_description: Information regarding property ownership and legal boundaries.
- square_feet: The size of the property in square feet (mean approximately 2.92k).
- market_value: The assessed market value of the property (mean approximately 815k, maximum recorded value is around 403 million).
- sale_date: The date of property sale (ranges from 1900-01-01, with historical records dating back to 1927).
- sale_price: The recorded sales price (mean approximately 562k, maximum recorded value is around 326 million).
- year_built: The year the property was built (25th percentile is 1938).
- x_state_plane, y_state_plane, x_web_mercator, y_web_mercator, latitude, longitude: Various spatial coordinates for geographic plotting and analysis.
- primary: A binary indicator column.
Distribution
This is a large tabular dataset stored in a CSV file (Portland_Maps_Assessor_Data.csv, 169.38 MB). It contains over half a million records (more than 716,000 total rows are available across key fields) and 25 columns. The data is regularly updated on a daily basis.
Usage
Ideal applications for this dataset include building machine learning models for property valuation, conducting economic studies on regional housing affordability, performing geographical information systems (GIS) mapping of real estate development, and analyzing long-term property market trends in the Multnomah, Clackamas, and Washington County areas.
Coverage
The geographic scope is focused on three key counties in Oregon: Multnomah, Clackamas, and Washington. The temporal coverage is substantial, featuring historical records for properties dating as far back as 1927.
License
CC0: Public Domain
Who Can Use It
Intended users include data scientists developing predictive models for property prices, real estate analysts researching market dynamics, urban planners studying land use and development, and academics interested in historical municipal data.
Dataset Name Suggestions
- Portland Metro Assessor Property Records
- Oregon Regional Real Estate Valuation Data
- Historical Property Assessment Data (Multnomah Area)
- Portland Maps Scraped Assessor Data
Attributes
Original Data Source:Oregon Regional Real Estate Valuation Data
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