Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2021
Nov. 03, 2021
Document and Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
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 Filer Category Non-accelerated Filer  
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   29,443,218
Entity Interactive Data Current Yes  
Title of 12(b) Security Common Shares, par value $.001 per share  
Security Exchange Name NYSE