| Cover - shares | 3 Months Ended | |
| Mar. 31, 2022 | May 03, 2022 | |
| Document Information [Line Items] | ||
| Document Type | 10-Q/A | |
| Amendment Flag | false | |
| Document Quarterly Report | true | |
| Document Transition Report | false | |
| Document Period End Date | Mar. 31, 2022 | |
| Document Fiscal Period Focus | Q1 | |
| Document Fiscal Year Focus | 2022 | |
| 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 | 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 Interactive Data Current | Yes | |
| Entity Filer Category | Non-accelerated Filer | |
| Entity Small Business | true | |
| Entity Emerging Growth Company | true | |
| Elected Not To Use the Extended Transition Period | false | |
| Entity Shell Company | false | |
| Entity Common Stock, Shares Outstanding | 36,283,119 | |
| Common Stock [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Common Shares, par value $.001 per share | |
| Trading Symbol | SACH | |
| Security Exchange Name | NYSEAMER | |
| 7.125% Notes Due 2024 [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 7.125% Notes due 2024 | |
| Trading Symbol | SCCB | |
| Security Exchange Name | NYSEAMER | |
| 6.875% Notes Due 2024 [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 6.875% Notes due 2024 | |
| Trading Symbol | SACC | |
| Security Exchange Name | NYSEAMER | |
| 7.75% Notes due 2025 [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 7.75% Notes due 2025 | |
| Trading Symbol | SCCC | |
| Security Exchange Name | NYSEAMER | |
| 6.00% Notes due 2026 [Member] | SCCD [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 6.00% Notes due 2026 | |
| Trading Symbol | SCCD | |
| Security Exchange Name | NYSEAMER | |
| 6.00% Notes due 2027 [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | 6.00% Notes due 2027 | |
| Trading Symbol | SCCE | |
| Security Exchange Name | NYSEAMER | |
| Series A Preferred Stock [Member] | ||
| Document Information [Line Items] | ||
| 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 | NYSEAMER |
