The White House is the official home of the president of the United States, it was first inhabited by John Adams, the second president of the U.S. The structure is built of aqueous sandstone mined from a tributary of the Potomac River. Thought to be very strong, it was less strong than the builders thought. The home is painted white as rumor says it's to cover up burn marks from the war of 1812 when the British burned it.
1 Day after People: The White House is not completely empty, Bo, President Barack Obama's Portugese water dog, wanders the entire home, until escaping to the wild.
20 Years after People: The White House's paint has been weathered away and the house now appears grey. Birds have taken up residence inside the building. The White House grounds are already returning to the watery wetlands just like before the first colonists arrived.
175 Years after People: Although the walls are still intact most of the White House's roof has fallen, Washington D.C. has now become a swamp. The sub-basements are 25 feet (7.6 m) below street level so water flows down through the pipes from the National Mall flooding the foundations, and the White House's sandstone structure is degrading into mud. Finally the water damage proves too much and the White House's North Portico collapses.