Best Shape for a Home Theater Rectangular rooms often work best for a home theater room. Especially when you can add acoustic panels and bass traps for added sound control.

Choose a room that's at least 15 feet wide and 20 feet long and you should have a good basis to start building your home theater. You may be a bit cramped if you opt to go smaller than this minimum home theater room size.

While there's no minimum room size required, a room that's at least 15 feet wide and 20 feet long is a good starting point when building your home theater. It also ensures you have enough extra space for standard theater equipment as well as optional furniture pieces like an A/V rack, bar, or an extra table.