Myrrzy,
we can have many different dimensions in our own universe but to create a space time bubble with its own exponential growth it is thought it can be done with only 30 lbs of matter under near infinite pressure.

IF you had a device to make that pressure in your basement you could put a 30lbs of bread dough in that oven and poof a new universe would be born.
Your house should be just fine since the resulting universe would sprout entirely outside our space time universe.

Usually those pressure ovens are inside super massive black holes.