Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2024	Feb. 19, 2025	Jun. 30, 2024
Document and Entity Information [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2024
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 State Or Province	WA
Entity Address, Address Line One	1099 Stewart Street
Entity Address, Adress Line Two	Suite 600
Entity Address, City or Town	Seattle
Entity Address, Postal Zip Code	98101
City Area Code	206
Local Phone Number	576-8610
Title of 12(b) Security	Common Stock, $0.001 par value per share
Trading Symbol	RDFN
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 706,662,982
Entity Common Stock, Shares Outstanding		126,389,290
Entity Central Index Key	0001382821
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false