UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 12b-25

Commission File Number 001-37997

NOTIFICATION OF LATE FILING

(Check One):

¨ Form 10-K ¨ Form 20-F ¨ Form 11-K x Form 10-Q ¨ Form 10-D

¨ Form N-SAR ¨ Form N-CSR

For Period Ended: June 30, 2017

¨ Transition Report on Form 10-K

¨ Transition Report on Form 20-F

¨ Transition Report on Form 11-K

¨ Transition Report on Form 10-Q

¨ Transition Report on Form N-SAR

For the Transition Period Ended:

Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates: N/A

PART I

REGISTRANT INFORMATION

Sachem Capital Corp.

Full Name of Registrant

Not Applicable

Former Name if Applicable

23 Laurel Street

Address of Principal Executive Office (Street and Number)

Branford, CT 06405

City, State and Zip Code

PART II

RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate.)

PART III

NARRATIVE

State below in reasonable detail the reasons why Form 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR or the transition report or portion thereof, could not be filed within the prescribed time period.

As a result of unforeseen administrative issues, the registrant was not able to file the Quarterly Report on form 10-Q for the period ended June 30, 2017 by the filing deadline on August 14, 2017 without unreasonable effort or expense.

PART IV

OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this notification

(2) Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s). x Yes ¨ No

(3) Is it anticipated that any significant change in results of operation from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? x Yes ¨ No

If so: attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

Revenue for the three and six months ended June 30, 2017 increased 42.4% and 43%, respectively, in comparison to the same prior year periods. Net income for the three and six months ended June 30, 2017 increased 10.1% and 19.4%, respectively, in comparison to the same prior year periods. These increases were due principally to an increase in the company’s lending activity, which was driven, in part, by the completion of the company’s initial public offering in February 2017.

Sachem Capital Corp.

(Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.

INSTRUCTION: The form may be signed by an executive officer of the registrant or by any other duly authorized representative. The name and title of the person signing the form shall be typed or printed beneath the signature. If the statement is signed on behalf of the registrant by an authorized representative (other than an executive officer), evidence of the representative’s authority to sign on behalf of the registrant shall be filed with the form.

ATTENTION

Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001).

GENERAL INSTRUCTIONS