Cover - USD ($) $ in Thousands	12 Months Ended
Cover - USD ($) $ in Thousands	Dec. 31, 2024	Apr. 24, 2025	Jun. 30, 2024
Document Type	10-K/A
Amendment Flag	true
Amendment Description	On February 27, 2025, Landsea Homes Corporation (the “Company”) filed its Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (the “Original Form 10-K”). This Amendment No. 1 (the “Amendment”) amends Part III, Items 10 through 14 of the Original Form 10-K to include information previously omitted from the Original Form 10-K in reliance on General Instruction G(3) to Form 10-K. General Instruction G(3) to Form 10-K provides that registrants may incorporate by reference certain information from a definitive proxy statement which involves the election of directors if such definitive proxy statement is filed with the Securities and Exchange Commission (the “SEC”) within 120 days after the end of the fiscal year or as an amendment to the Form 10-K if such amendment is filed no later than the end of the 120-day period. The reference on the cover of the Original Form 10-K to the incorporation by reference to portions of our definitive proxy statement into Part III of the Original Form 10-K is hereby deleted. Pursuant to the rules of the SEC, Part IV, Item 15 has also been amended to contain the currently dated certifications from the Company’s principal executive officer and principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Except as described above, this Amendment does not amend any other information set forth in the Original Form 10-K, and we have not updated disclosures included therein to reflect any subsequent events. This Amendment should be read in conjunction with the Original Form 10-K and with our filings with the SEC subsequent to the Original Form 10-K.
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2024
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--12-31
Entity File Number	001-38545
Entity Registrant Name	LANDSEA HOMES CORPORATION
Entity Central Index Key	0001721386
Entity Tax Identification Number	82-2196021
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	1717 McKinney Avenue
Entity Address, Address Line Two	Suite 1000
Entity Address, City or Town	Dallas
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75202
City Area Code	(949)
Local Phone Number	345-8080
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 169,500
Entity Common Stock, Shares Outstanding		36,409,560
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Common Stock, par value $0.0001 per share
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	LSEA
Security Exchange Name	NASDAQ
Warrants exercisable for Common Stock
Title of 12(b) Security	Warrants exercisable for Common Stock
Trading Symbol	LSEAW
Security Exchange Name	NASDAQ

Landsea Homes Corp 10-K/A