Annual report pursuant to Section 13 and 15(d)

Cover

v3.20.4
Cover - USD ($)
 12 Months Ended
Dec. 31, 2020
Mar. 08, 2021
Jun. 30, 2020
Schedule of Capitalization, Equity [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2020    
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 660 Newport Center Drive    
Entity Address, Address Line Two Suite 300    
Entity Address, City or Town Newport Beach    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92660    
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 No    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company false    
Entity Public Float     $ 146,355,252
Entity Common Stock, Shares Outstanding   46,231,025  
ICFR Auditor Attestation Flag false    
Common Stock, $0.0001 par value per share      
Schedule of Capitalization, Equity [Line Items]      
Title of 12(b) Security Common Stock, $0.0001 par value per share    
Trading Symbol LSEA    
Security Exchange Name NASDAQ    
Warrants exercisable for Common Stock      
Schedule of Capitalization, Equity [Line Items]      
Title of 12(b) Security Warrants exercisable for Common Stock    
Trading Symbol LSEAW    
Security Exchange Name NASDAQ