Cover - shares	3 Months Ended
Mar. 31, 2026	May 18, 2026
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Transition Report	false
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	568 East 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 Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		47,955,647
Entity Central Index Key	0001682220
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q1
Amendment Flag	false
Document Fiscal Year Focus	2026
Common shares, par value $0.001 per share
Document and Entity Information
Title of 12(b) Security	Common shares, par value $0.001 per share
Trading Symbol	SACH
Security Exchange Name	NYSE
6.00% Notes due 2026
Document and Entity Information
Title of 12(b) Security	6.00% Notes due 2026
Trading Symbol	SCCD
Security Exchange Name	NYSE
6.00% Notes due 2027
Document and Entity Information
Title of 12(b) Security	6.00% Notes due 2027
Trading Symbol	SCCE
Security Exchange Name	NYSE
7.125% Notes due 2027
Document and Entity Information
Title of 12(b) Security	7.125% Notes due 2027
Trading Symbol	SCCF
Security Exchange Name	NYSE
8.00% Notes due 2027
Document and Entity Information
Title of 12(b) Security	8.00% Notes due 2027
Trading Symbol	SCCG
Security Exchange Name	NYSE
7.75% Series A Cumulative Redeemable Preferred Stock, Liquidation Preference $25.00 per share
Document and Entity Information
Title of 12(b) Security	7.75% Series A Cumulative Redeemable Preferred Stock, Liquidation Preference $25.00 per share
Trading Symbol	SACHPRA
Security Exchange Name	NYSE

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