Editing Basement (section)

===Subbasement===
A subbasement is a floor below the basement floor. In the homes where there is any type of basement mentioned above, such as a look-out basement, all of the volume of the subbasements from floor to ceiling are located well below ground. Therefore, subbasements have no windows nor an outside door. In the homes that have subbasements, all of the basement can be used as part of the main home where people relax and do recreational things, while all of the subbasement can be used for storage. Subbasements are much more common in larger structures, such as commercial buildings and larger apartment buildings, than they are in single family homes. It is common for [[skyscrapers]] to have multiple subbasements.<ref>{{Cite journal|doi = 10.1007/s41062-016-0010-2|title = Tall building foundations: Design methods and applications|year = 2016|last1 = Poulos|first1 = Harry G.|journal = Innovative Infrastructure Solutions|volume = 1| issue=1 | page=10 |doi-access = free| bibcode=2016InnIS...1...10P }}</ref>

Building a subbasement is more difficult, costly, and time-consuming than building a basement as the lowest floor. Subbasements are even more susceptible to flooding and water damage than basements and are therefore rare, except in [[arid climate|dry climates]] and at higher elevations.

Some famous landmarks contain subbasements. The subbasement of the [[US Capitol Building]] is used as storage and that in the [[White House]] is used to store guest items.