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  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED
  STATES<br>
  SECURITIES AND EXCHANGE COMMISSION</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington, DC&#160; 20549</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade color="black" align="center"></div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">FORM&nbsp;8-K</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade color="black" align="center"></div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">CURRENT
  REPORT</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Pursuant
  to Section&nbsp;13 or 15(d)&nbsp;of<br>
  the Securities Exchange Act of 1934</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date of report (Date of earliest event
  reported)<b> May&nbsp;8, 2008 (May&nbsp;2, 2008)</b></font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">CORPORATE
  OFFICE PROPERTIES TRUST</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Exact name of registrant as specified in its
  charter)</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div align="center">
  
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    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Maryland</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">1-14023</font></b></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">23-2947217</font></b></p>
    </td>
   </tr>
   <tr>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(State or other jurisdiction of<br>
    incorporation)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Commission<br>
    File Number)</font></p>
    </td>
    <td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.0%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="32%" valign="top" style="padding:0in 0in 0in 0in;width:32.0%;">
    <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(IRS Employer<br>
    Identification Number)</font></p>
    </td>
   </tr>
  </table>
  
  </div>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">6711 Columbia Gateway Drive, Suite&nbsp;300<br>
  Columbia, Maryland 21046</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Address of principal executive offices)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(443) 285-5400</font></b></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Registrant&#146;s telephone number, including
  area code)</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate box below if the Form&nbsp;8-K
  filing is intended to simultaneously satisfy the filing obligation of the
  registrant under any of the following provisions (see General Instruction A.2
  below):</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font face="Times New Roman">&nbsp;</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font face="Times New Roman">
  Written communications pursuant to Rule&nbsp;425 under the Securities Act (17
  CFR 230.425)</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font face="Times New Roman">&nbsp;</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font face="Times New Roman">
  Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR
  240.14a-12)</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font face="Times New Roman">&nbsp;</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt 9.0pt;text-indent:-9.0pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font face="Times New Roman">
  Pre-commencement communications pursuant to Rule&nbsp;14d-2(b)&nbsp;under the
  Exchange Act (17 CFR 240.14d-2(b))</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt 9.0pt;text-indent:-9.0pt;"><font face="Times New Roman">&nbsp;</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt 9.0pt;text-indent:-9.0pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font face="Times New Roman">
  Pre-commencement communications pursuant to Rule&nbsp;13e-4(c)&nbsp;under the
  Exchange Act (17 CFR 240.13e-4(c))</font></p>
  
  <div style="border:none;border-bottom:double windowtext 6.0pt;padding:0in 0in 0in 0in;">
  
  <p style="border:none;font-size:10.0pt;margin:0in 0in .0001pt 9.0pt;padding:0in;text-indent:-9.0pt;"><font face="Times New Roman">&nbsp;</font></p>
  
  </div>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='',FILE='C:\JMS\dchen\08-13876-1\task2925128\13876-1-ba.htm',USER='dchen',CD='May  8 13:49 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div style="font-family:Times New Roman;">
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt 1.0in;text-indent:-1.0in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 1.01</font></b><b><font size="1" style="font-size:8.5pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Entry into a
  Material Definitive Agreement</b></p>
  
  <p style="margin:0in 0in .0001pt 1.0in;text-indent:-1.0in;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On May&nbsp;2, 2008, the
  Registrant and its operating partnership, Corporate Office Properties, L.P.
  (the &#147;Operating Partnership&#148;), entered into a construction loan agreement (the &#147;Construction
  Loan Agreement&#148;) with a group of lenders for which KeyBanc Capital Markets,&nbsp;Inc.
  acted as arranger, KeyBank National Association (&#147;KeyBank&#148;) acted as
  administrative agent, Bank of America, N.A. acted as syndication agent and
  Manufacturers and Traders Trust Company acted as documentation agent. &#160;See the description of this agreement in Item
  2.03 below.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="font-size:10.0pt;margin:0in 0in .0001pt 1.0in;text-indent:-1.0in;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Item 2.03</font></b><b><font size="1" style="font-size:8.5pt;font-weight:bold;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Creation of a Direct Financial Obligation or
  an Obligation under an Off-Balance Sheet Arrangement of a Registrant</b></p>
  
  <p style="margin:0in 0in .0001pt 1.0in;text-indent:-1.0in;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">On May&nbsp;2, 2008, the
  Registrant and the Operating Partnership entered into the Construction Loan Agreement
  with a group of lenders for which KeyBanc Capital Markets,&nbsp;Inc. acted as
  arranger, KeyBank acted as administrative agent, Bank of America, N.A. acted as
  syndication agent and Manufacturers and Traders Trust Company acted as
  documentation agent.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The Construction Loan
  Agreement provides for an aggregate commitment by the lenders of $225.0
  million, with a right for the Operating Partnership to further increase the
  lenders&#146; aggregate commitment during the term to a maximum of $325.0 million,
  subject to certain conditions.&#160; Ownership
  interests in the properties for which construction costs are being financed through
  loans under the Construction Loan Agreement (each a &#147;Loan&#148;) are pledged as
  collateral for the Loan.&#160; Borrowings are
  generally available for properties included in the Construction Loan Agreement
  based on 85% of the total budgeted costs of construction of the applicable
  improvements for such properties as set forth in the properties&#146; construction
  budgets, subject to certain other Loan-to-value and debt coverage requirements.&#160; The Construction Loan Agreement matures on May&nbsp;2,
  2011, and may be extended by one year at the Operating Partnership&#146;s option,
  subject to certain conditions.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The variable interest rate
  on each Loan is based on one of the following, to be selected by the Operating
  Partnership: (1)&nbsp;subject to certain conditions, the LIBOR rate for the interest
  period designated by the Operating Partnership (customarily the 30-day rate)
  plus 1.6% to 2.0%, as determined by the Registrant&#146;s leverage levels at
  different points in time; or (2)&nbsp;the greater of (a)&nbsp;the prime rate of
  the lender then acting as agent or (b)&nbsp;the Federal Funds Rate, as defined
  in the Construction Loan Agreement, plus 0.50%.&#160;
  Interest is payable at the end of each interest period (as defined in
  the Construction Loan Agreement), and principal outstanding under each Loan is
  payable on the maturity date.&#160; The Construction
  Loan Agreement also carries a quarterly fee that is based on the unused amount
  of the commitment multiplied by a per annum rate of 0.125% to 0.20%.</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-autospace:none;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Under the Construction
  Loan Agreement, the Registrant must comply with customary covenants for
  construction loan agreements.&#160; All
  outstanding principal and accrued interest and fees under the Construction Loan
  Agreement may, at the option of the lender, become immediately due and the Construction
  Loan Agreement could be terminated upon events of default, including, among
  other things, noncompliance with financial covenants, failure to make required
  payments on Loans or other material indebtedness of the Registrant, failure to
  maintain its status as a real estate investment trust or bankruptcy.</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">2</font></p>
  
  <div style="margin:0in 0in .0001pt;"><hr size="3" width="100%" noshade color="#010101" align="left"></div>
  
  </div>
  <!-- SEQ.=1,FOLIO='2',FILE='C:\JMS\dchen\08-13876-1\task2925128\13876-1-ba.htm',USER='dchen',CD='May  8 13:49 2008' -->
  
  
  <br clear="all" style="page-break-before:always;">
  
  
  <div>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>
  
  <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman">&nbsp;</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.25in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Pursuant to the
  requirements of the Securities Exchange Act of 1934, the Registrant has duly
  caused this report to be signed on its behalf by the undersigned hereunto duly
  authorized.</font></p>
  
  <p style="margin:0in 0in .0001pt;text-indent:.25in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
  
  <table border="0" cellspacing="0" cellpadding="0" width="100%" style="border-collapse:collapse;width:100.0%;">
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.42%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date: May&nbsp;8, 2008</font></p>
    </td>
    <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.58%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.42%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.58%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.42%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.58%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">CORPORATE OFFICE PROPERTIES TRUST</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.42%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.58%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.42%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
    <td width="49%" colspan="2" valign="top" style="padding:0in 0in 0in 0in;width:49.58%;">
    <p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.42%;">
    <p style="margin:0in 0in .0001pt;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="6%" valign="top" style="padding:0in 0in 0in 0in;width:6.5%;">
    <p style="margin:0in 0in .0001pt;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>
    </td>
    <td width="43%" valign="top" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:43.08%;">
    <p style="margin:0in 0in .0001pt;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ Stephen E. Riffee</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.42%;">
    <p style="margin:0in 0in .0001pt;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="6%" valign="top" style="padding:0in 0in 0in 0in;width:6.5%;">
    <p style="margin:0in 0in .0001pt;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>
    </td>
    <td width="43%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:43.08%;">
    <p style="margin:0in 0in .0001pt;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Stephen E. Riffee</font></p>
    </td>
   </tr>
   <tr>
    <td width="50%" valign="top" style="padding:0in 0in 0in 0in;width:50.42%;">
    <p style="margin:0in 0in .0001pt;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
    </td>
    <td width="6%" valign="top" style="padding:0in 0in 0in 0in;width:6.5%;">
    <p style="margin:0in 0in .0001pt;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>
    </td>
    <td width="43%" valign="top" style="padding:0in 0in 0in 0in;width:43.08%;">
    <p style="margin:0in 0in .0001pt .05in;text-indent:0in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Executive Vice President
    and Chief <br>
    Financial Officer</font></p>
    </td>
   </tr>
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metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "a08-13876_18k.htm", "description": "8-K", "secsgml_size_bytes": 21903}]
metadata_filer: {"company-data": {"conformed-name": "CORPORATE OFFICE PROPERTIES TRUST", "cik": "0000860546", "assigned-sic": "6798", "irs-number": "232947217", "state-of-incorporation": "MD", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-14023", "film-number": "08814323"}, "business-address": {"street1": "8815 CENTRE PARK DR", "street2": "SUITE 400", "city": "COLUMBIA", "state": "MD", "zip": "21045", "phone": "6105381800"}, "mail-address": {"street1": "8815 CENTRE PARK DR", "street2": "SUITE 400", "city": "COLUMBIA", "state": "MD", "zip": "21045"}, "former-company": [{"former-conformed-name": "CORPORATE OFFICE PROPERTIES TRUST INC", "date-changed": "19980105"}, {"former-conformed-name": "ROYALE INVESTMENTS INC", "date-changed": "19930328"}, {"former-conformed-name": "ROYALE REIT INC", "date-changed": "19600201"}]}
text: UNITED
  STATES
  SECURITIES AND EXCHANGE COMMISSION
  Washington, DC  20549
  FORM 8-K
  CURRENT
  REPORT
  Pursuant
  to Section 13 or 15(d) of
  the Securities Exchange Act of 1934
  Date of report (Date of earliest event
  reported)
  May 8, 2008 (May 2, 2008)
  CORPORATE
  OFFICE PROPERTIES TRUST
  (Exact name of registrant as specified in its
  charter)
  Maryland
  1-14023
  23-2947217
  (State or other jurisdiction of
  incorporation)
  (Commission
  File Number)
  (IRS Employer
  Identification Number)
  6711 Columbia Gateway Drive, Suite 300
  Columbia, Maryland 21046
  (Address of principal executive offices)
  (443) 285-5400
  (Registrant's telephone number, including
  area code)
  Check the appropriate box below if the Form 8-K
  filing is intended to simultaneously satisfy the filing obligation of the
  registrant under any of the following provisions (see General Instruction A.2
  below):
  o
  Written communications pursuant to Rule 425 under the Securities Act (17
  CFR 230.425)
  o
  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
  240.14a-12)
  o
  Pre-commencement communications pursuant to Rule 14d-2(b) under the
  Exchange Act (17 CFR 240.14d-2(b))
  o
  Pre-commencement communications pursuant to Rule 13e-4(c) under the
  Exchange Act (17 CFR 240.13e-4(c))
  Item 1.01
  Entry into a
  Material Definitive Agreement
  On May 2, 2008, the
  Registrant and its operating partnership, Corporate Office Properties, L.P.
  (the "Operating Partnership"), entered into a construction loan agreement (the "Construction
  Loan Agreement") with a group of lenders for which KeyBanc Capital Markets, Inc.
  acted as arranger, KeyBank National Association ("KeyBank") acted as
  administrative agent, Bank of America, N.A. acted as syndication agent and
  Manufacturers and Traders Trust Company acted as documentation agent.  See the description of this agreement in Item
  2.03 below.
  Item 2.03
  Creation of a Direct Financial Obligation or
  an Obligation under an Off-Balance Sheet Arrangement of a Registrant
  On May 2, 2008, the
  Registrant and the Operating Partnership entered into the Construction Loan Agreement
  with a group of lenders for which KeyBanc Capital Markets, Inc. acted as
  arranger, KeyBank acted as administrative agent, Bank of America, N.A. acted as
  syndication agent and Manufacturers and Traders Trust Company acted as
  documentation agent.
  The Construction Loan
  Agreement provides for an aggregate commitment by the lenders of $225.0
  million, with a right for the Operating Partnership to further increase the
  lenders' aggregate commitment during the term to a maximum of $325.0 million,
  subject to certain conditions.  Ownership
  interests in the properties for which construction costs are being financed through
  loans under the Construction Loan Agreement (each a "Loan") are pledged as
  collateral for the Loan.  Borrowings are
  generally available for properties included in the Construction Loan Agreement
  based on 85% of the total budgeted costs of construction of the applicable
  improvements for such properties as set forth in the properties' construction
  budgets, subject to certain other Loan-to-value and debt coverage requirements.  The Construction Loan Agreement matures on May 2,
  2011, and may be extended by one year at the Operating Partnership's option,
  subject to certain conditions.
  The variable interest rate
  on each Loan is based on one of the following, to be selected by the Operating
  Partnership: (1) subject to certain conditions, the LIBOR rate for the interest
  period designated by the Operating Partnership (customarily the 30-day rate)
  plus 1.6% to 2.0%, as determined by the Registrant's leverage levels at
  different points in time; or (2) the greater of (a) the prime rate of
  the lender then acting as agent or (b) the Federal Funds Rate, as defined
  in the Construction Loan Agreement, plus 0.50%. 
  Interest is payable at the end of each interest period (as defined in
  the Construction Loan Agreement), and principal outstanding under each Loan is
  payable on the maturity date.  The Construction
  Loan Agreement also carries a quarterly fee that is based on the unused amount
  of the commitment multiplied by a per annum rate of 0.125% to 0.20%.
  Under the Construction
  Loan Agreement, the Registrant must comply with customary covenants for
  construction loan agreements.  All
  outstanding principal and accrued interest and fees under the Construction Loan
  Agreement may, at the option of the lender, become immediately due and the Construction
  Loan Agreement could be terminated upon events of default, including, among
  other things, noncompliance with financial covenants, failure to make required
  payments on Loans or other material indebtedness of the Registrant, failure to
  maintain its status as a real estate investment trust or bankruptcy.
  2
  SIGNATURES
  Pursuant to the
  requirements of the Securities Exchange Act of 1934, the Registrant has duly
  caused this report to be signed on its behalf by the undersigned hereunto duly
  authorized.
  Date: May 8, 2008
  CORPORATE OFFICE PROPERTIES TRUST
  By:
  /s/ Stephen E. Riffee
  Name:
  Stephen E. Riffee
  Title:
  Executive Vice President
    and Chief
  Financial Officer
  3