Annual report pursuant to Section 13 and 15(d)

Cover page

v3.22.0.1
Cover page - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Mar. 09, 2022
Jun. 30, 2021
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-38545    
Entity Registrant Name LANDSEA HOMES CORPORATION    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 82-2196021    
Entity Address, Address Line Two Suite 300    
Entity Address, Address Line One 660 Newport Center Drive    
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 Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Public Float     $ 91.6
Entity Common Stock, Shares Outstanding   46,436,185  
Entity Central Index Key 0001721386    
Amendment Flag false    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Common Stock | NASDAQ - ALL MARKETS      
Entity Information [Line Items]      
Title of 12(b) Security Common Stock, par value $0.0001 per share    
Trading Symbol LSEA    
Security Exchange Name NASDAQ    
Warrant | NASDAQ - ALL MARKETS      
Entity Information [Line Items]      
Title of 12(b) Security Warrants exercisable for Common Stock    
Trading Symbol LSEAW    
Security Exchange Name NASDAQ