The Havenbrook Manor has a square footage of about 45,000 sq.ft. Surrounding the building itself is an expansive garden, an outdoor pool, and a massive outdoor training area.
Within, the building is rectangular in shape, longer going east to west, with the main door/gates facing south. Walking in, you find yourself in a grand entrance large enough to be a ballroom all on its own, with stairs leading up to the second floor balcony. There are actually three floors, with a ground floor, second floor, and basement level.
There are dozens of rooms for the hunters to sleep in, with private rooms available for distinguished hunters (and guests). Besides ones attached to bedrooms, there are a dozen separate baths. There is a smaller indoor pool, a gymnasium, a game room, a ballroom, an indoor training room, an expansive library, and a gallery of the Guilds prizes and findings over the years.
The sub floors are occupied by a large meeting room, a large laboratory, a smaller lab, the armory, and the smithy/forge.
Note that many of the walls have been reinforced to make it fort like, and there are even four stone watch towers surrounding it. Gargoyles of various size are all over the outside.
Hunters usually need a reason to go to the rooms in the basement, but are allowed anywhere on the first and second floors with two exceptions; Lady Havenbrook's office and adjoining bedroom, and her garage.
Approximate real world cost: $35,000,000