| **EXHIBIT      31.1**                                                                                             |
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| **Certification      of Chief Executive Officer       Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002** |
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| I,      Richard S. Ziman, certify that:                                                                           |
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| 1)                                                                                                                | I have reviewed this quarterly report on Form 10-Q of Arden Realty Limited      Partnership; |
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| 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; |
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| 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 registrant as of, and for, the periods presented in      this report. |
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| 4)                                                                                                           | The      registrant’s other certifying officer 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 registrant and have: |
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|                                                                                                              | 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 registrant, including its consolidated subsidiaries,      is made known to us by others within those entities, particularly during      the period in which this report is being prepared; |
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|                                                                                                              |  b) | evaluated      the effectiveness of the registrant’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 |
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|                                                                                                              | c) | disclosed      in this report any change in the registrant’s internal control over      financial reporting that occurred during the registrant’s most recent      fiscal quarter (the registrant’s fourth fiscal quarter in the case      of an annual report) that has materially affected, or is reasonably likely      to materially affect, the registrant’s internal control over financial      reporting; and |
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| 5)                                                                                                                | I      have disclosed, based on my most recent evaluation of internal control over      financial reporting, to the registrant’s auditors and the audit committee      of the registrant’s board of directors (or persons performing the equivalent      functions): |
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|                                                                                                              | 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 registrant’s ability to record, process, summarize      and report financial information; and |
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|                                                                                                              | b) | any      fraud, whether or not material, that involves management or other employees      who have a significant role in the registrant’s internal control over      financial reporting. |
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| Date:      November 13, 2003 | By:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | /s/ Richard S. Ziman |
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|                         |  Richard S. Ziman Chairman of      the Board and Chief Executive      Officer Arden Realty,      Inc.  **Certification      of Chief Financial Officer      Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002** I, Richard      S. Davis, certify that:    1)I      have reviewed this quarterly report on Form 10-Q of Arden Realty 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 registrant as of,      and for, the periods presented in this report.   4)      The registrant’s other certifying officer 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 registrant 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 registrant, including its consolidated subsidiaries,      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 registrant’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 registrant’s internal control over financial      reporting that occurred during the registrant’s most recent fiscal      quarter (the registrant’s fourth fiscal quarter in the case of an annual      report) that has materially affected, or is reasonably likely to materially      affect, the registrant’s internal control over financial reporting;      and   5)      I have disclosed, based on my recent evaluation of internal control over      financial reporting, to the registrant’s auditors and the audit committee      of the registrant’s board of directors (or persons performing the equivalent      functions):    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 registrant’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 registrant’s internal control over financial      reporting.      Date:      November 13, 2003By:        /s/ Richard S. Davis   Richard S. Davis       Senior Vice      President and   Chief Financial      Officer  Arden Realty,      Inc.   **Certification      of Chief Operating Officer      Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002** I, Victor      J. Coleman, certify that:     1)I      have reviewed this quarterly report on Form 10-Q of Arden Realty 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 registrant as of,      and for, the periods presented in this report.   4)The      registrant’s other certifying officer 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 registrant 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 registrant, including its consolidated subsidiaries,      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 registrant’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 registrant’s internal control over financial      reporting that occurred during the registrant’s most recent fiscal      quarter (the registrant’s fourth fiscal quarter in the case of an annual      report) that has materially affected, or is reasonably likely to materially      affect, the registrant’s internal control over financial reporting;      and   5)      I have disclosed, based on my most recent evaluation of internal control      over financial reporting, to the registrant’s auditors and the audit      committee of the registrant’s board of directors (or persons performing      the equivalent functions):    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 registrant’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 registrant’s internal control over financial      reporting.      Date:      November 13, 2003By:        /s/ Victor J. Coleman    Victor J. Coleman       President and       Chief Operating      Officer  Arden Realty,      Inc.   **Certification      of Executive Vice President      Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002** I, Andrew      J. Sobel, certify that:    1)      I have reviewed this quarterly report on Form 10-Q of Arden Realty 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 registrant as of,      and for, the periods presented in this report.   4)The      registrant’s other certifying officer 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 registrant 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 registrant, including its consolidated subsidiaries,      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 registrant’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 registrant’s internal control over financial      reporting that occurred during the registrant’s most recent fiscal      quarter (the registrant’s fourth fiscal quarter in the case of an annual      report) that has materially affected, or is reasonably likely to materially      affect, the registrant’s internal control over financial reporting;      and   5)      I have disclosed, based on my most recent evaluation of internal control      over financial reporting, to the registrant’s auditors and the audit      committee of the registrant’s board of directors (or persons performing      the equivalent functions):    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 registrant’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 registrant’s internal control over financial      reporting.      Date:      November 13, 2003By:        /s/ Andrew J. Sobel  Andrew J. Sobel Executive Vice      President, Strategic Planning      and Operations Arden Realty,      Inc.  **Certification      of Senior Vice President Pursuant to Section 302      of the Sarbanes-Oxley Act of 2002** I, Robert      C. Peddicord, certify that:    1)I      have reviewed this quarterly report on Form 10-Q of Arden Realty 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 registrant as of,      and for, the periods presented in this report.   4)The      registrant’s other certifying officer 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 registrant 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 registrant, including its consolidated subsidiaries,      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 registrant’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 registrant’s internal control over financial      reporting that occurred during the registrant’s most recent fiscal      quarter (the registrant’s fourth fiscal quarter in the case of an annual      report) that has materially affected, or is reasonably likely to materially      affect, the registrant’s internal control over financial reporting;      and   5)      I have disclosed, based on my most recent evaluation of internal control      over financial reporting, to the registrant’s auditors and the audit      committee of the registrant’s board of directors (or persons performing      the equivalent functions):    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 registrant’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 registrant’s internal control over financial      reporting.      Date:      November 13, 2003By:        /s/ Robert C. Peddicord  Robert C. Peddicord Senior Vice      President, Leasing and      Property Operations Arden Realty,      Inc.  **Certification      of General Counsel Pursuant to Section 302      of the Sarbanes-Oxley Act of 2002** I, David      A. Swartz, certify that:    1)I      have reviewed this quarterly report on Form 10-Q of Arden Realty 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 registrant as of,      and for, the periods presented in this report.   4)The      registrant’s other certifying officer 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 registrant 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 registrant, including its consolidated subsidiaries,      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 registrant’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 registrant’s internal control over financial      reporting that occurred during the registrant’s most recent fiscal      quarter (the registrant’s fourth fiscal quarter in the case of an annual      report) that has materially affected, or is reasonably likely to materially      affect, the registrant’s internal control over financial reporting;      and   5)      I have disclosed, based on my most recent evaluation of internal control      over financial reporting, to the registrant’s auditors and the audit      committee of the registrant’s board of directors (or persons performing      the equivalent functions):    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 registrant’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 registrant’s internal control over financial      reporting.      Date:      November 13, 2003By:        /s/ David A. Swartz  David A. Swartz General Counsel      and  Secretary Arden Realty,      Inc.   |