Finding a way to enhance a living space without changing the footprint is always very exciting to us. This geodesic dome is easy to fabricate and build, has 209 square feet and is 18 feet at its widest and 13 feet at its tallest. It has no frame, is made out of corrugated plastic and blueboard foam insulation, is held together by bolts, and is only 2 1/2 inches thick. You will be comfortable with electricity, heating and air conditioning, and it will only set you back around $2100. The dome is extremely easy to disassemble, making it very portable.