| Cover - shares | 9 Months Ended | |
| Sep. 30, 2024 | Nov. 13, 2024 | |
| Document Type | 10-Q/A | |
| Amendment Flag | false | |
| Document Quarterly Report | true | |
| Document Transition Report | false | |
| Document Period End Date | Sep. 30, 2024 | |
| Document Fiscal Period Focus | Q3 | |
| Document Fiscal Year Focus | 2024 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity File Number | 001-37997 | |
| Entity Registrant Name | SACHEM CAPITAL CORP. | |
| Entity Central Index Key | 0001682220 | |
| Entity Tax Identification Number | 81-3467779 | |
| Entity Incorporation, State or Country Code | NY | |
| 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 | 46,965,306 | |
| Common shares | ||
| Title of 12(b) Security | Common shares, par value $.001 per share | |
| Trading Symbol | SACH | |
| Security Exchange Name | NYSE | |
| 6.875% Notes due 2024 | ||
| Title of 12(b) Security | 6.875% Notes due 2024 | |
| Trading Symbol | SACC | |
| Security Exchange Name | NYSE | |
| 7.75% Notes due 2025 | ||
| Title of 12(b) Security | 7.75% Notes due 2025 | |
| Trading Symbol | SCCC | |
| Security Exchange Name | NYSE | |
| 6.00% Notes due 2026 | ||
| Title of 12(b) Security | 6.00% Notes due 2026 | |
| Trading Symbol | SCCD | |
| Security Exchange Name | NYSE | |
| 6.00% Notes due 2027 | ||
| Title of 12(b) Security | 6.00% Notes due 2027 | |
| Trading Symbol | SCCE | |
| Security Exchange Name | NYSE | |
| 7.125% Notes due 2027 | ||
| Title of 12(b) Security | 7.125% Notes due 2027 | |
| Trading Symbol | SCCF | |
| Security Exchange Name | NYSE | |
| 8.00% Notes due 2027 | ||
| Title of 12(b) Security | 8.00% Notes due 2027 | |
| Trading Symbol | SCCG | |
| Security Exchange Name | NYSE | |
| Series A Preferred Stock | ||
| 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 |
