Houses have been implemented as of CircleMUD 3.0.  A house entails two things:
access control and crash protection.  Only you and your guests will be allowed
to enter the house.  Your house will be crash-saved every five minutes.  You
can force your house to save by typing 'save' while standing in your house.
In the event of a crash, the objects in your house as of the last crash-save
will be loaded back into your house when the MUD reboots.  Also, if you own
a house, and quit from the game while standing in your house, you will be
loaded into your house next time you enter the game.

Guests of your house can be defined using the HOUSE command.  See HOUSE for
more information.

Houses are an alternative to renting.  You can simply enter your house and
quit; your objects will drop to the ground and be crash-saved for when you
return.  There is currently no limit to the number of objects which can be
stored in your house.  Of course, players must expect to pay a much higher
premium for the convenience of houses; contact your local Implementor for
a fee schedule.