Credit goes to an online user sporting the moniker ‘Disneyhead’. They have managed to snap some shots of the beginings of the King’s Cross Station facade.
The photographs were taken at the Nassal Company building.
The Nassal Company is located right here in Orlando, Florida (we may have to do some snooping). They are the company who fabricated the exteriors for the existing Wizarding World of Harry Potter. Given Universal’s loyalty to certain companies, Nassal would get the contract for Project 722.
The above molds appear to be the exterior for King’s Cross Station, the building that will house the Hogwarts Express.
The exterior of King’s Cross was filmed at Pancras Station. These molds appear to be based on Pancras . Here is a reference photo of one of Harry Potter’s most famous locals (take careful note of the windows compared with Nassal’s version above):