pre_text: item 2 . properties our principal offices are located in boston , southborough and woburn , massachusetts ; atlanta , georgia ; mexico city , mexico ; and sao paulo , brazil . details of each of these offices are provided below: .
post_text: ( 1 ) of the total 30000 square feet in our current leasehold , we are consolidating our operations into 20000 square feet during 2004 and are currently offering the remaining 10000 square feet for re-lease or sub-lease . we have seven additional area offices in the united states through which our tower leasing and services businesses are operated on a local basis . these offices are located in ontario , california ; marietta , georgia ; crest hill , illinois ; worcester , massachusetts ; new hudson , michigan ; mount pleasant , south carolina ; and kent , washington . in addition , we maintain smaller field offices within each of the areas at locations as needed from time to time . our interests in individual communications sites are comprised of a variety of fee and leasehold interests in land and/or buildings ( rooftops ) . of the approximately 15000 towers comprising our portfolio , approximately 16% ( 16 % ) are located on parcels of land that we own and approximately 84% ( 84 % ) are either located on parcels of land that have leasehold interests created by long-term lease agreements , private easements and easements , licenses or rights-of-way granted by government entities , or are sites that we manage for third parties . in rural areas , a wireless communications site typically consists of a 10000 square foot tract , which supports towers , equipment shelters and guy wires to stabilize the structure , whereas a broadcast tower site typically consists of a tract of land of up to twenty-acres . less than 2500 square feet are required for a monopole or self-supporting tower structure of the kind typically used in metropolitan areas for wireless communication tower sites . land leases generally have an initial term of five years with three or four additional automatic renewal periods of five years , for a total of twenty to twenty-five years . pursuant to our credit facilities , our lenders have liens on , among other things , all towers , leasehold interests , tenant leases and contracts relating to the management of towers for others . we believe that our owned and leased facilities are suitable and adequate to meet our anticipated needs . item 3 . legal proceedings we periodically become involved in various claims and lawsuits that are incidental to our business . we believe , after consultation with counsel , that no matters currently pending would , in the event of an adverse outcome , have a material impact on our consolidated financial position , results of operations or liquidity . item 4 . submission of matters to a vote of security holders .
table: Location Function Size (square feet) Property Interest
table: Boston Corporate Headquarters; US Tower Division 30,000<sup>(1)</sup> Leased
table: Southborough Data Center 13,900 Leased
table: Woburn Lease Administration 34,000 Owned
table: Atlanta US Tower and Services Division; Accounting 17,900 (Rental)4,800 (Services) Leased
table: Mexico City Mexico Headquarters 12,300 Leased
table: Sao Paulo Brazil Headquarters 3,200 Leased
question: Analyse this data from a financial earnings document. what portion of the boston property will be offered for sub-lease?