vocabulary: name: Redfin API Vocabulary description: >- Domain vocabulary for the Redfin real estate platform covering property listings, housing market data, geographic regions, valuation concepts, and transaction terminology. version: "1.0.0" created: "2026-05-02" tags: - Real Estate - Housing Market - Property Data - GIS terms: - term: AVM label: Automated Valuation Model definition: >- A statistical model that estimates property value based on comparable sales, property characteristics, and market trends. Redfin's AVM product is called the Redfin Estimate. synonyms: - Redfin Estimate - Home Value Estimate - term: Days On Market label: Days On Market (DOM) definition: >- The number of calendar days a property has been actively listed for sale. Properties that are relisted after a cancellation may reset the DOM counter. abbreviation: DOM - term: GIS Search label: GIS-Based Property Search definition: >- Geographic Information System search that uses region boundaries, polygons, or map extents to filter and return property listings within a geographic area. - term: HOA Fee label: Homeowners Association Fee definition: >- A recurring monthly fee charged by a homeowners association to cover shared amenity maintenance, insurance, and management costs. Common in condo, townhouse, and planned community developments. abbreviation: HOA - term: Inventory label: Active Housing Inventory definition: >- The total count of properties actively listed for sale in a market at a given time. Higher inventory generally indicates a buyer's market; lower inventory indicates a seller's market. - term: Listing Status label: Listing Status definition: >- The current transactional state of a property listing. Redfin statuses include Active, Pending, Sold, Contingent, and Off-Market. values: - active: Currently available for sale. - pending: Under contract, sale not yet completed. - sold: Transaction completed. - contingent: Under contract with contingencies. - off-market: Not currently listed for sale. - term: Market Tracker label: Redfin Market Tracker Dataset definition: >- A downloadable dataset from the Redfin Data Center containing aggregated housing market metrics for a geographic level and time period. Metrics include median sale price, homes sold, new listings, inventory, days on market, sale-to-list ratio, and price drops. - term: MLS label: Multiple Listing Service definition: >- A cooperative database used by real estate brokers to share information about properties for sale. Each local MLS assigns a unique MLS ID to each listing. abbreviation: MLS - term: Months of Supply label: Months of Supply definition: >- A measure of housing market balance calculated by dividing current active inventory by the monthly sales pace. Values below 3 typically indicate a seller's market; above 6 indicate a buyer's market. - term: MSA label: Metropolitan Statistical Area definition: >- A US Census Bureau designation for a core urban area with a population of at least 50,000, plus surrounding communities with high degrees of economic and social integration. Used by Redfin for metro-level data. abbreviation: MSA synonyms: - metro - metropolitan area - term: Off Market In Two Weeks label: Percent Off Market In Two Weeks definition: >- The proportion of listings that received an accepted offer and went off market (active to pending or sold) within 14 days of listing. A high value indicates strong buyer demand and competitive conditions. - term: Pending label: Pending Sale definition: >- A property that has an accepted offer and is under contract but has not yet closed. Also called "under contract." - term: Price Drop label: Listing Price Reduction definition: >- A reduction in the asking price of an active listing. The Redfin price_drops metric reports the proportion of active listings that have had at least one price reduction. - term: Property Type label: Property Type Classification definition: >- Classification of a property by its physical structure. Redfin recognizes: house (single-family), condo, townhouse, multi-family, land, and other. values: - "1": House (Single Family) - "2": Condo / Co-op - "3": Townhouse - "4": Multi-Family - "5": Land - "6": Other - term: Redfin Estimate label: Redfin Estimate (AVM) definition: >- Redfin's automated property valuation computed using a machine learning model trained on public records, MLS data, and user-submitted information. Updated daily for active listings and weekly for off-market properties. - term: Region ID label: Redfin Region Identifier definition: >- A numeric identifier assigned by Redfin to a geographic region such as a city, ZIP code, county, or neighborhood used for filtering search results and retrieving market data. - term: Region Type label: Redfin Region Type definition: >- The geographic classification of a Redfin region. Values include 1 (neighborhood), 2 (ZIP code), 5 (county), and 6 (city). values: - "1": Neighborhood - "2": ZIP Code - "5": County - "6": City - term: Sale To List Ratio label: Sale-to-List Price Ratio definition: >- The ratio of the final sale price to the last list price. A ratio above 1.0 means the home sold above asking price; below 1.0 means it sold below asking price. Tracked as an average across all sales in the Redfin market tracker. - term: Stingray API label: Redfin Stingray API definition: >- The internal REST API that powers Redfin.com and the Redfin mobile applications. Accessed at redfin.com/stingray endpoints. Not officially documented by Redfin but reverse-engineered by the developer community. - term: TSV label: Tab-Separated Values definition: >- A plain-text data format where fields are separated by tab characters. Redfin Data Center files are distributed as compressed TSV (.tsv.gz) to minimize download size. abbreviation: TSV