'We proposed a hidden door concept here because we wanted the space to feel as dedicated dining room and for the hidden passageway to integrate with the floor-to-ceiling storage cabinets.

Homeowners are adding hidden doors and rooms to foil burglars, ... often without a frame or visible hinges — for a powder room on the parlor floor of a gut-renovated brownstone in Brooklyn.

“There is a hidden, secret floor,” listing agent Laura Thomas Mullen said to Realtor.com. “It just looks like a hallway door and when you go into the room, there is a little storage door.

“There is a hidden, secret floor,” listing agent Laura Thomas Mullen said to Realtor.com. “It just looks like a hallway door and when you go into the room, there is a little storage door.

The secret floor also has a safe. The owner, who has lived in the place for 29 years, had some initial problems unlocking it and eventually hired a safe cracker. Turned out, there was nothing inside.

“There is a hidden, secret floor,” listing agent Laura Thomas Mullen said to Realtor.com. “It just looks like a hallway door and when you go into the room, there is a little storage door.