available , we do not expect any transactions to have a significant impact on our reported income tax expense . in connection with the completion of the reorganization , we will reevaluate the ability to realize our deferred tax assets related to u.s . operations under the new aon uk corporate structure and we may recognize a non-cash , deferred tax expense upon the conclusion of this evaluation . based on information currently available , we do not expect the additional deferred tax expense , if any , to be significant . the reorganization will result in additional ongoing costs to us . the completion of the reorganization will result in an increase in some of our ongoing expenses and require us to incur some new expenses . some costs , including those related to employees in our u.k . offices and holding board meetings in the u.k. , are expected to be higher than would be the case if our principal executive offices were not relocated to the u.k. . we also expect to incur new expenses , including professional fees and sdrt in connection with settlement of equity-based awards under our stock or share incentive plans , to comply with u.k . corporate and tax laws . item 1b . unresolved staff comments . item 2 . properties . we have offices in various locations throughout the world . substantially all of our offices are located in leased premises . we maintain our corporate headquarters at 200 e . randolph street in chicago , illinois , where we occupy approximately 355000 square feet of space under an operating lease agreement that expires in 2013 . there are two five-year renewal options at current market rates . we own one building at pallbergweg 2-4 , amsterdam , the netherlands ( 150000 square feet ) . the following are additional significant leased properties , along with the occupied square footage and expiration. .

Table:
property: | occupied square footage | lease expiration dates
4 overlook point and other locations lincolnshire illinois | 1224000 | 2014 2013 2019
2601 research forest drive the woodlands texas | 414000 | 2020
dlf city and unitech cyber park gurgaan india | 383000 | 2012 2013 2014
2300 discovery drive orlando florida | 364000 | 2020
devonshire square and other locations london uk | 327000 | 2018 2013 2023
199 water street new york new york | 319000 | 2018
7201 hewitt associates drive charlotte north carolina | 218000 | 2015
7201 hewitt associates drive , charlotte , north carolina .
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218000 2015 the locations in lincolnshire , illinois , the woodlands , texas , orlando , florida , and charlotte north carolina , each of which were acquired as part of the hewitt acquisition in 2010 , are primarily dedicated to our hr solutions segment .
the other locations listed above house personnel from each of our business segments .
in november 2011 , aon entered into an agreement to lease 190000 square feet in a new building to be constructed in london , united kingdom .
the agreement is contingent upon the completion of the building construction .
aon expects to move into the new building in 2015 when it exercises an early break option at the devonshire square location. .

Question: considering the properties with lease expiration dates in 2020 , what is the average occupied square footage?
Answer: 389000
Calculation: add(414000, 364000), divide(#0, const_2)