Quarterly report pursuant to Section 13 or 15(d)

Cover Page

Cover Page - shares
6 Months Ended
Jun. 30, 2019
Jul. 26, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2019  
Document Transition Report false  
Entity File Number 001-38160  
Entity Registrant Name Redfin Corporation  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 74-3064240  
Entity Address, Address Line One 1099 Stewart Street  
Entity Address, Address Line Two Suite 600  
Entity Address, City or Town Seattle  
Entity Address, State or Province WA  
Entity Address, Postal Zip Code 98101  
City Area Code (206)  
Local Phone Number 576-8333  
Title of 12(b) Security Common Stock, $0.001 par value per share  
Trading Symbol RDFN  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   91,834,413
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001382821  
Amendment Flag false