Dimensions for the first floor. The dome was based on the geodesic design from Monterey Domes Inc, California. The largest of the dome series a 5-8' base wall extension could be added to afford more floor space on the third floor. Already 2700 sq ft, the base wall extension would add 400 additional sq ft. Planned additions include a full finished basement and a 5' base wall extension. Partially buried the exterior elevations would not change nor would the overall elevation of the home on the lot. The entry dormer could be extended to encompass an aquarium entry tunnel and guest coat closets.