There is no photography allowed in the mansions. During the Holidays you may ask permission to take a photograph of the Christmas tree in the breakers or Marble house. This is by permission only. In Rosecliff you can ask for a picture to be taken on the heart shaped staircase. It was very annoying to see people disregarding the rules and snapping away while walking through the house.
Pictures of the exterior of the house and grounds are allowed.
There is absolutely no photography allowed inside any of the mansions and the only exception is during the Christmas holiday season when you are allowed to photograph the Christmas trees in both The Breakers and Marble House and during the summer when photography is allowed in the Logia of The Breakers.
It is clearly stated that photography is prohibited indoors. Photography is permited of the exterior of the mansions including the many gardens and only if you are using the photos for personal use (copy rights).
Respect the rules and do not try to sneak in any pictures of the interior of the mansions.