First of all, to reach your home, you can go through the in-game Cell Phone - HomeTown.

Have you reached the Home Town? The house with your player name written on it is your home!

If you get close to the sign, you can access the house shop.

At the House Shop, you can purchase decorations using in-game currency such as Bux and Gems.

The size of your house can change depending on what you purchase.