Lego Harry Potter Hogwarts Castles
The first Lego Hogwarts castle was released with the Sorcerer's Stone. It is Lego Hogwarts Castle 4709, which is no longer available in stores nor at Lego.com. You can find it by other resellers ($310 at Amazon). There were/are three other Hogwarts Castle sets: 4757, 4842, and 5378.
Lego Hogwarts 4757 is a 944 piece set which was released with Prisoner of Azkaban in 2004. It came with 9 minifigs: Professor Trelawney, Draco Malfoy in green Quidditch uniform, Skeleton, 2 Dementors, Hermione, Ron Weasley, Harry Potter, Dumbledore. It was originally listed for ~$100, but now fetches a
Lego Hogwarts 4842 is a 1290 piece set which was released in 2010, the same year as the movie release for Deathly Hallows. It is ~$142 at Amazon and is currently available from Lego.com for $129.99. Details include Dumbledore's office with sliding spiral stairs, Slytherin and Gryffindor common rooms, the
restricted portion of the library and the Great Hall. It came with 11 minifigures: Harry Potter, Hermione, Lord Voldemort, Dumbledore, Snape, McGonagall, Flitwick, Argus Filch and his cat and 2 dementors. Within Dumbledore's office you will find unique elements such as the Sorting Hat, Gryffindors Sword, a
Lego Hogwarts 5378 is a 943 piece set which was released in 2007 to correspond with Harry Potter's 5th year, Order of the Phoenix. It was originally ~ $90, but since it is no longer offered by Lego it can reach as high as $450 from Amazon, $129 directly from Lego. Along with the theme of Order of the Phoenix, unique rooms including Room of Requirement where one gets their wish by walking past the room 3 times. There is a Greenhouse (Herbology classroom) for raising the mandrake (included) and there is the fireplace in the Gryffindor common room to communicate with Sirius Black (whose head is in the fireplace). The set came with 9 minifigs including Dolores Umbridge, Hagrid, Ron Weasley, Dumbledore (in blue), Death Eater, Snape, Hermione, Draco Malfoy (gray with Slytherin color tie), and Harry Potter plus a Thestral, the large winged skeletal horses.
All the Hogwarts sets, due to their complexity, are best for ages 6-12 and will take ~ 3 or more hours to build. They can be modified to make alternate configurations with instructions included in the kits.