The Baxter Building is a 30-story apartment and office building located in Manhattan on Lexington Avenue between 51st and 52nd Streets; the top five floors serve as the headquarters of the Fantastic Four. One high-speed maglev elevator has been installed to run from the ground floor to the twenty-sixth, while all of the other elevators in the building stop at the twenty-fifth.
Prior to the formation of the Fantastic Four, the top five floors were rented out by Dr. Reed Richards, with the top four converted into a combination of observatory and physics laboratory. Following the formation of the Fantastic Four, the rest of the team moved in while Dr. Richards studied the changes to their physiologies. More recently, following a dispute with their landlord, Dr. Richards purchased the building outright. After buying the building, Dr. Richards added some additional features, including the afore-mentioned high-speed elevator.
Top Floor
This floor consists of the astrophysics lab, observatory, and hangar space for the Fantastic Four's about-town air-car, the so-called Fantasticar, with an elevator to bring the air-car to the roof.
Twenty-Ninth Floor
This floor consists of the Negative Zone portal, blockaded with doors made of adamantium to prevent hostiles from forcing their way to Earth, and Dr. Richards' own particle accelerator.
Twenty-Eighth Floor
This floor consists of laboratories for various scientific disciplines. It includes a full surgical operating suite with a Stark Industries automatic diagnostic bed, and a rapid prototyping 3D printer capable of handling most materials.
Twenty-Seventh Floor
This floor contains the Fantastic Four's training facilities, including a weight room with machines that can simulate weights up to 100 tons for use by Ben Grimm and various superhumanly strong allies.
Twenty-Sixth Floor
This is the primary living and office space for the Fantastic Four. The elevator to the ground floor opens into a lobby where visitors are greeted by Roberta, an artificially intelligent robot made to look and sound like a live human being from the waist up. Not far from the lobby is a conference room with windows that have been treated with a process that can adjust their transparency from opaque to almost invisible by adjusting the flow of electricity through them. There are four suites on this floor, which the members of the Fantastic Four use as their private quarters.
Eleventh through Twenty-Fifth Floors
These floors consist primarily of apartments leased to other tenants in the building.
Second through Tenth Floors
These floors are rented as office space to other businesses operating in New York City. Of ironic note is Good Help Staffing, the front company for Henchmen For Hire, a staffing agency catering to the criminal element, on the fifth floor.
Ground Floor
This floor consists of the primary public offices of the Fantastic Four.
Basement Levels
The basement of the Baxter Building had been converted at some point in the past to act as a parking garage for tenants. The lowest level, however, has been adapted to house a Stark Industries ARC reactor, which is used to power the top floors of the building without drawing from the New York City power grid.
First Post-Reboot Appearance: FANTASTIC FOUR #