The opening was initially expected before summer vacation 2013 and planners say they expect to host the hotel's first guests April 5, 2013.
The park, which recently added a new Sea Park Aquarium, is adding the hotel in the hopes of keeping visitors at the attractions longer than one day.
Among the features will be a large dragon model that will breathe smoke as guests enter according to a Legoland spokesperson.
Other Lego models that have arrived in advance of the opening are pirates, explorers and bakers.
The folks at Legoland aren't new to the world of hotels. The Legoland Billund hotel in Denmark, built in 1991, has 199 rooms geared toward business guests and families with its two auditoriums and 31 conferences rooms.
The Carlsbad hotel will offer rooms with pirate, kingdom, and adventure themes. Room decor includes frog princes and parrots made of out Legos, themed bedding and a treasure chest containing a special Lego prize.
Reservations are already being accepted. Rooms start at $309 a night opening weekend.
The park is offering a pre-opening package for $484 that includes breakfast and park tickets. Get more details here.