We now have floor plans of Castle's loft, Beckett's apartment, and the 12th Precinct, as shown below. Click on the links to view the floor plans. They are also available as PDF documents.

Dustjackets: A Castle WikiDustjackets: A Castle Wiki
Castle's LoftBeckett's (new) Apartment
Dustjackets: A Castle Wiki6x23 Hamptons 03
The 12th Precinct The Hamptons
7x13 078x01 22
Richard Castle Investigations (original)Richard Castle Investigations (remodel)

All the photographs, screen caps, etc., can be found here: Photobucket Locations