CONSTRUCT

If you'd like to add certain options to your house such as +regen rooms,
banks, or changing the terrain to outdoors, then you can do this without
contacting a house builder.  Simply go to your house or vault and type
CONSTRUCT to see a list of options.  For all house upgrades that are not
listed, contact an Immortal.

See Also: HOUSES, VISIT, GUEST, BINS, VAULT, NOBLE