• Drains in the floor so you just hose everything down

• Build into side of a hill

• Roomba™ robot vacuum cleaner

• Cubicle in the house

• Padded walls

• Motorized Tie racks

• Two dishwashers

• Urinal

• A room that had whiteboard material floor to ceiling

• Walls that are toddler-painting-proof

• Scream room

• Whole house vacuum

• Astroturf lawn

• Laundry chute

• Solar panels (or solar shingles)

• Always-warm water (not waiting)

• Secret room/lab/office located behind a movable bookcase.

• Wireless everything

• Workshop that's inside the house, not banned to the garage

• Home theater

• Cable room

• Radiant floor heating

• Automatic faucets (as seen at airport lavatories)

• Dungeon for Dogbert's use

• Panic room

• Firehouse pole

• Dome construction

• Motion detectors for lights (most rooms)