A house plan is a set of construction or working drawings (also known as blueprints) that outline all of the residential house's building parameters, such as measurements, materials, layouts, installation methods, and procedures. The blueprint also indicates any codes applicable to its design. The typical house has three floors: the first floor is the ground floor; the second floor is the main living area; and the third floor is the attic or roof deck. Each floor has its own identity based on function and material choice. The first floor is where you will find the entrance door, kitchen, dining room, family room, master bedroom, and bathroom. This is also where you will find the furnace and other heating systems if you live in a cold climate. The second floor is where you will find the remaining bedrooms and bathrooms as well as an optional fourth bedroom. The third floor is usually an open space with no specific use except for storage. It may have its own private exit from the house or not be accessible from any other part. There are several types of houses including freestanding houses, attached houses, and condominiums. Freestanding houses are built on their own foundation and do not have a basement or garage underneath them.