National Map >  Region 11: National Capital >  Maryland >  District 08 > MD1383 HELP GSA Building Stats   12100 PARKLAWN DR 12100 PARKLAWN DR ROCKVILLE , MD 20852-1708 For information on properties in Region 11, contact: Anthony Pagonis 202-260-0751 202-260-0751 Tony.Pagonis@gsa.gov Representative: Van Hollen, Chris  (D)  Representative URL: http://vanhollen.house.gov/ Senator: Cardin, Benjamin L. (D) Senator URL: http://cardin.senate.gov/ Senator: Mikulski, Barbara A. (D) Senator URL: http://mikulski.senate.gov/ Lease Details Lease Code Initial Effective Date Expiration Date Usable Sq Feet Status LMD01405 6/30/2001 6/29/2011 75675 Active/Pending   Square Footage Building Rentable SF: 77183 Leased Usable SF: 75675 Available Space: 0