Exhibit 31

                    WINTHROP PARTNERS 80 LIMITED PARTNERSHIP
                FORM 10-KSB FOR THE YEAR ENDED DECEMBER 31, 2005

                                 CERTIFICATIONS

I, Michael L. Ashner, in the capacities indicated below, certify that:

      1. I have reviewed this annual report on Form 10-KSB of Winthrop Partners
80 Limited Partnership;

      2. Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to make
the statements made, in light of the circumstances under which such statements
were made, not misleading with respect to the period covered by this report;

      3. Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the Small Business
Issuer as of, and for, the periods presented in this report;

      4. The Small Business Issuer's other certifying officer(s) and I are
responsible for establishing and maintaining disclosure controls and procedures
(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the Small
Business Issuer and have:

            a) Designed such disclosure controls and procedures, or caused such
      disclosure controls and procedures to be designed under our supervision,
      to ensure that material information relating to the Small Business Issuer
      is made known to us by others within those entities, particularly during
      the period in which this report is being prepared;

            b) Evaluated the effectiveness of the Small Business Issuer's
      disclosure controls and procedures and presented in this report our
      conclusions about the effectiveness of the disclosure controls and
      procedures, as of the end of the period covered by this report based on
      such evaluation; and

            c) Disclosed in this report any change in the Small Business
      Issuer's internal control over financial reporting that occurred during
      the Small Business Issuer's most recent fiscal quarter (the Small Business
      Issuer's fourth fiscal quarter in the case of an annual report) that has
      materially affected, or is reasonably likely to materially affect, the
      Small Business Issuer's internal control over financial reporting; and

<PAGE>

      5. The Small Business Issuer's other certifying officer(s) and I have
disclosed, based on our most recent evaluation of internal control over
financial reporting, to the Small Business Issuer's auditors and the audit
committee of the Small Business Issuer's board of directors (or persons
performing the equivalent function):

            a) All significant deficiencies and material weaknesses in the
      design or operation of internal control over financial reporting which are
      reasonably likely to adversely affect the Small Business Issuer's ability
      to record, process, summarize and report financial information; and

            b) Any fraud, whether or not material, that involves management or
      other employees who have a significant role in the Small Business Issuer's
      internal control over financial reporting.


Date: March 30, 2006                       /s/ Michael L. Ashner
                                           -------------------------------------
                                           Michael L. Ashner
                                           Chief Executive Officer and President

<PAGE>

                    WINTHROP PARTNERS 80 LIMITED PARTNERSHIP
                FORM 10-KSB FOR THE YEAR ENDED DECEMBER 31, 2005

                                 CERTIFICATIONS

I, Thomas Staples, in the capacity indicated below, certify that:

      1. I have reviewed this annual report on Form 10-KSB of Winthrop Partners
80 Limited Partnership;

      2. Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to make
the statements made, in light of the circumstances under which such statements
were made, not misleading with respect to the period covered by this report;

      3. Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material respects the
financial condition, results of operations and cash flows of the Small Business
Issuer as of, and for, the periods presented in this report;

      4. The Small Business Issuer's other certifying officer(s) and I are
responsible for establishing and maintaining disclosure controls and procedures
(as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the Small
Business Issuer and have:

            a) Designed such disclosure controls and procedures, or caused such
      disclosure controls and procedures to be designed under our supervision,
      to ensure that material information relating to the Small Business Issuer
      is made known to us by others within those entities, particularly during
      the period in which this report is being prepared;

            b) Evaluated the effectiveness of the Small Business Issuer's
      disclosure controls and procedures and presented in this report our
      conclusions about the effectiveness of the disclosure controls and
      procedures, as of the end of the period covered by this report based on
      such evaluation; and

            c) Disclosed in this report any change in the Small Business
      Issuer's internal control over financial reporting that occurred during
      the Small Business Issuer's most recent fiscal quarter (the Small Business
      Issuer's fourth fiscal quarter in the case of an annual report) that has
      materially affected, or is reasonably likely to materially affect, the
      Small Business Issuer's internal control over financial reporting; and

<PAGE>

      5. The Small Business Issuer's other certifying officer(s) and I have
disclosed, based on our most recent evaluation of internal control over
financial reporting, to the Small Business Issuer's auditors and the audit
committee of the Small Business Issuer's board of directors (or persons
performing the equivalent function):

            a) All significant deficiencies and material weaknesses in the
      design or operation of internal control over financial reporting which are
      reasonably likely to adversely affect the Small Business Issuer's ability
      to record, process, summarize and report financial information; and

            b) Any fraud, whether or not material, that involves management or
      other employees who have a significant role in the Small Business Issuer's
      internal control over financial reporting.


Date: March 30, 2006                                /s/ Thomas Staples
                                                    ----------------------------
                                                    Thomas Staples
                                                    Chief Financial Officer