Walt Disney World is preparing to build an addition to Disney's Grand Floridian Resort & Spa, the most expensive of the giant resort's 17 hotels.

A permit application submitted to the South Florida Water Management District describes a six- to seven-story, T-shaped building that will be connected via a covered walkway to the existing Grand Floridian. The nearly 900-room, Victorian-themed hotel, next to the Magic Kingdom, has standard room rates that begin at $440 a night.

No construction timetable was provided, and Disney wouldn't discuss the project Tuesday.