Fantasy novel about a house/manor that is more than it appears [s]

[Ann aka Iftcan]

One of the Crestomanci books by Diana Wynne Jones has a house/castle that is similar to this. Conrad's Fate possibly??? Sorry, it's been many years since I read these (altho I loved them), but I Know that it's one of the Crestomanci books.

[Sue]

'The High House' by James Stoddard?
"Carter Anderson's father is the Master of the High House, a mystical dwelling filled with twisting corridors, magical books, and secret passageways. As Master, his father maintains not only the High House, but the world, keeping it safe from evil. Mr. Anderson sends Carter away for his own safety; but when Carter returns, he finds that the House's worst enemies have invaded -- and his father is nowhere to be found."

[Sally]

House of Leaves probably. I've only just read the beginning so far but it's about a house that's bigger on the inside than the outside.

[Cheryl]

House of Leaves for the link to the other book. ;)