The Headquarters Building[]
Doc Savage's accepted base of operations is a Penthouse Apartment on the 86th Floor of the Empire State Building. Although it is never actually stated in the original pulps, Phillip Jose Farmer's Doc Savage His Apocholyptic Life and many fans and fansite reach the conclusion his office is in the Empire State Building.
Doc Savage first had the idea for a skyscraper home and headquarters in his teen years. By that time he was already looking to the future when his studies and training would be completed, and he would begin his strange career.
Designed by Doc and Renny Renwick to be the world's tallest skyscraper, construction began in early 1930. A unique approach to the construction sequencing of structural steel, concrete and stone masonry activities devised by Renny, accelerated the installation, and the building opened for business in record time on May 1st 1931.
Doc Savage took occupancy of the 86th floor 3 weeks later. From a height of 1,050 feet above the street below, his offices command a view of all of Manhattan Island as well as the Hudson and East Rivers.
The 86th Floor[]
Doc Savages office is on the 86th floor of a New York City skyscraper, implicitly the Empire State Building, reached by Doc's private high-speed elevator. Doc owns a fleet of cars, trucks, aircraft, and boats which he stores at a secret hangar on the Hudson River, under the name The Hidalgo Trading Company, which is linked to his office by a pneumatic-tube system nick-named the "flea run." He sometimes retreats to his Fortress of Solitude in the Arctic—. All of this is paid for with gold from a Central American mine given to him by the local Mayans in the first Doc Savage story. (Doc and his assistants learned the little-known Mayan language of this people, allowing them to communicate privately when others might be listening.)
As a precaution when first meeting somone he will place a sheet of bullet proof glass infront of the doorway. This saved his life in The Monsters when an assassin tried to gun him down.