Eisenhower Executive Office Building
Eisenhower Executive Office Building
The Eisenhower Executive Office Building (EEOB) houses most of the staff for the White House. You can also see a small bit of the New Executive Office Building (the red brick building on the far left), which is half a block away.

The EEOB is right next to the White House.

Photos credit: John Hunter (or as noted in the description, a few photos are from others). This photo can be used with attribution