Math skills used to calculate volume are used to determine how much space will require environmental control. This information is used to choose an adequate heating and cooling system to control temperature within the new house design.
Volume can also be used to measure the amount of space an object occupies, rather than an entire space. In house design, house site prep may require an estimate of how much dirt removal will be necessary for a basement or pool.
An estimate of construction materials required is also part of house design. Area can be used to estimate the amount of materials such as flooring, drywall, tile, shingles or counter tops needed for a particular house design.
When designing unusual house features, such as oddly-shaped rooms, multiple angles or curved walls, geometry is used to calculate how these features will integrate with traditional house design elements.