Hogwarts Castle throughout the film series

Throughout the Harry Potter film series, Hogwarts Castle has changed significantly. This article shows the changes that have occurred over the series.

Harry Potter and the Philosopher's Stone
In the Philosopher's Stone film, only the parts of the castle that were needed for the film were created. This means that many areas of Hogwarts were missed.

Areas of the castle included in the movie were:
 * The Great Hall
 * The Staircase Tower
 * The Viaduct
 * The Viaduct Entrance
 * The Library Tower
 * The Bell Towers
 * The Defence Against the Dark Arts Tower
 * The Northern Towers
 * The Transfiguration Courtyard
 * The Training Ground
 * The Stone Bridge
 * The Suspension Bridge
 * The Boat House
 * Hagrid's Hut
 * The Quidditch Pitch

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Harry Potter and the Chamber of Secrets
In the Chamber of Secrets film, the main castle is basically the same as in Philosopher's Stone.

The only noticeable changes are that the Greenhouses are added to the east corner of the castle below the bell towers. Also, the Whomping Willow is added to the Training Ground. It is possible that the Whomping Willow was there in Philosopher's Stone, but it was never shown.

Harry Potter and the Prisoner of Azkaban
The Prisoner of Askaban film sees the most drastic changes to the castle in the series. But, the main shape of Hogwarts is still there.

These are some of the main changes that are seen in this movie:
 * The Clock Tower, Clock Tower Courtyard, the Covered Bridge and Stone Circle are added to the back of the castle.
 * The Library Tower and Bell Towers now have different shapes.
 * The building that was in front of the Great Hall in the first two movies is changed to a Courtyard.
 * The Dark Tower is added in between the DADA Tower and Library Tower.
 * Hagrid's Hut is moved down the hill at the back of the castle and a Pumpkin Patch is added.
 * The Whomping Willow is moved to somewhere past Hagrid's Hut away from the castle.

These changes probably came about because of the new director, Alfonso Caurón.

Harry Potter and the Goblet of Fire
In the Goblet of Fire movie, there are no actual changes to Hogwarts Castle itself, but the Owlery is added on a hill behind the castle.

Harry Potter and the Order of the Phoenix
In the Order of the Phoenix film, the castle stays the same as it was in Goblet of Fire.

Harry Potter and the Half-Blood Prince
In the Half Blood Prince film, there are two major changes from the earlier films.

These are:
 * The Astronomy Tower is added which means that the DADA Tower and Dark Tower removed.
 * The Northern Towers are replaced by another smaller bell tower.
 * The Hogwarts Gates are added further down the hill to the back of Hogwarts.

The reason for the Astronomy Tower is self explanatory, but the no reason in the film for the Northern Towers to be changed.