Exhibit 31.1**CHIEF EXECUTIVE OFFICER CERTIFICATION**I, Terry Considine, certify that:1. 1 have reviewed this quarterly report on Form 10-Q of AIMCO Properties, L.P.; 2. Based on my knowledge, this report does not contain any untruestatement of a material fact or omit to statea material fact necessary to make the statements made, in light of thecircumstances under which suchstatements were made, not misleading with respect to the period covered by thisreport; 3. Based on my knowledge, the financial statements, and other financialinformation included in this report,fairly present in all material respects the financial condition, results ofoperations and cash flows of theregistrant as of, and for, the periods presented in this report; 4. The registrant’s other certifying officer(s) and I are responsiblefor establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) and internal controlover financial reporting (as defined in Exchange Act Rules 13a-15(f) and15d-15(f)) for the registrant andhave: (a) Designed such disclosure controls and procedures, orcaused such disclosure controls andprocedures to be designed under our supervision, to ensure that materialinformation relating to theregistrant, including its consolidaled subsidiaries, is made known to usby others within thoseentities, particularly during the period in which this report is beingprepared;  (b) Designed such internal control over financialreporting, or caused such internal control overfinancial reporting to be designed under our supervision, to providereasonable assurance regarding the reliability of financial reporting and the preparationof financial statements for external purposes in accordance with generally accepted accountingprinciples;  (c) Evaluated the effectiveness of the registrant’sdisclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosurecontrols and procedures, as ofthe end of the period covered by this report based on such evaluation; and  (d) Disclosed in this report any change in the registrant’sinternal control over financial reporting thatoccurred during the registrant’s most recent fiscal quarter (theregistrant’s fourth fiscal quarter inthe case of an annual report) that has materially affected, or isreasonably likely to materiallyaffect, the registrant’s internal control over financial reporting.5. The registrant’s other certifying officer(s) and I have disclosed,based on our most recent evaluation ofinternal control over financial reporting, to the registrant’s auditors and theaudit committee of theregistrant’s board of directors (or persons performing the equivalentfunctions): (a) All significant deficiencies and material weaknesses inthe design or operation of internal controlover financial reporting which are reasonably likely to adversely affectthe registrant’s ability to record, process, summarize and report financial information; and  (b) Any fraud, whether or not material, that involvesmanagement or other employees who have asignificant role in the registrant’s internal control over financialreporting.   November 3, 2005      /s/ Terry Considine     Terry Considine  Chairman and Chief Executive Officer  (equivalent of the chief executive officer of AIMCO  Properties, L.P.)