Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2025	May 13, 2025
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2025
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Document Quarterly Report	true
Document Transition Report	false
Entity Registrant Name	Millrose Properties, Inc.
Entity Central Index Key	0002017206
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity File Number	001-42476
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	99-2056892
Entity Address, Address Line One	600 Brickell Avenue
Entity Address, Address Line Two	Suite 1400
Entity Address, City or Town	Miami
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33131
City Area Code	212
Local Phone Number	782-3841
Title of 12(b) Security	Class A common stock, par value $0.01 per share
Trading Symbol	MRP
Security Exchange Name	NYSE
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		154,183,686
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		11,819,811