Cinderella's Chateau

Cinderella's Chateau is where Cinderella, her widowed father, her dog Bruno, and her horse Major once lived just before her father married Lady Tremaine (who had 2 daughters; Anastasia and Drizella), until he passed away. Though it was, once upon a time, a grand and stately building, the narrator revealed that it had "fallen into disrepair", for Cinderella's cruel, unloving stepmother neglected to care for it, and squandered much of the fortune she inherited from her late husband on her two vain, selfish daughters, and mistreated her stepdaughter out of pure, personal jealousy.

Cinderella
In Cinderella, the story mostly takes place inside the chateau. It depicts Cinderella's daily life with her animal friends and her stepfamily after her father's passing. It shows her doing the chores of the house and how she's maltreated by her stepmother, her stepsisters and Lucifer the mischievous cat. The once grand home has fallen in disrepair in the years following the death of Cinderella's father.

Cinderella II: Dreams Come True
The only appearance of the chateau is at the last story segment An Uncommon Romance where Anastasia falls in love for a baker while her mother forbidds her to be with and forget about him since he's not a man of high status. Cinderella and her animal friends do everything they can so Anastasia can be with the baker.

Cinderella III: A Twist in Time
The chateau makes its last appearance in Cinderella III: A Twist in Time. At the beginning of the movie, it shows Cinderella's stepsisters Drizella and Anastasia doing the chores of the house, since Cinderella left the house to live in the castle with her prince. It's also the place where Lady Tremaine took possession of the magic wand of the Fairy Godmother and how she turned back in time to change Cinderella's happily ever after.

Trivia

 * Cinderella's Chateau was a part of the original plans for the Magic Kingdom's Fantasyland expansion before being replaced with the Seven Dwarfs Mine Train roller coaster.
 * After the events of the third film, it is unknown what becomes of the chateau after the family leaves, it is presumed abandoned.