Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Mar. 30, 2022
Jun. 30, 2021
Document and Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2021    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Entity File Number 001-37997    
Entity Registrant Name SACHEM CAPITAL CORP.    
Entity Incorporation, State or Country Code NY    
Entity Tax Identification Number 81-3467779    
Entity Address, Address Line One 698 Main Street    
Entity Address, City or Town Branford    
Entity Address, State or Province CT    
Entity Address, Postal Zip Code 06405    
City Area Code 203    
Local Phone Number 433-4736    
Entity Current Reporting Status Yes    
Entity Central Index Key 0001682220    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 125.8
Entity Small Business true    
Entity Emerging Growth Company true    
Entity Ex Transition Period false    
Entity Shell Company false    
Trading Symbol SACH    
Entity Common Stock, Shares Outstanding   35,513,887  
Entity Interactive Data Current Yes    
Title of 12(b) Security Common Shares, par value $.001 per share    
Security Exchange Name NYSE    
ICFR Auditor Attestation Flag false    
Auditor Name Hoberman & Lesser CPA’s, LLP    
Auditor Firm ID 694    
Auditor Location New York