Titanium or Tungsten.

i would make it out of heavy metal. they'll never irradiate me in here!

Poured concrete blocks with a stucco facade!

Love

I would make mine out of ice cream! Chocolate preferably.

Metallic hydrogen.

Starship

I'd make it out of bricks, just in case someone tries to huff, and puff, and blow my house in.

The bones of my enemies.

I'd dig down under a large, wide rooted tree and carve the dirt out a chamber above the water table. After sealing it with a layer of clay, I'd panel the interior with aromatic woods. Finally I'd rework the entry tunnel(s) so that I have a choice of several hidden means of entrance and egress.

Gold and platinum.

The skulls of my victims.........Vlad told me to type that...

Dreams - and if it would be a palace it would be made out of air.

The nice thing: one can easily be a real estate mogul. While the "real" part is up to interpretation.

I dont know, but I know for sure if I had money and could build a house, it would have a solarium attached to it.

All homes should have solariums so we can grow basic produce ourselves.

Straw