What a website to design houses thats free?

I don’t know of any, however designing a house isn’t as easy as just finding a website. You may design the appearance, but it takes architectural and/or engineering know-how to make sure it is safe. You may also need to run by your idea by the city to see if there are any restrictions with the building code in your neighborhood. (They have codes mostly in suburban areas.)

Edit: Lol, I just realized this is in the Video & Online Games section. Uhm, hmm. Borrow a copy of the game The Sims from a friend?