Usable: Area of all rooms except for the technical room, garage, utility room, attic. When sizes does not include plaster and wall coverings.
Net area: This is the area of all rooms of the building measured at floor level, taking into account plaster and wall cladding. Does not diminish the floor area of variable height - eg. In the attic. To put it simply - so as to spread in all areas of the carpet on the floor.

Living area: Is a surface contour of the exterior walls of the building. For building area is not included: the underground part of the building, ramp car, external stairs, porches, canopies over the entrances, galleries and all floor. But it takes into account eg. Conservatories or other elements of the build.

Cubic: The volume of the room, or floor area multiplied by the height of the floor. To calculate the volume of the assumed height measured from the floor - from the bottom floor or to the bottom of the flat roof.

The height of the house - height from ground level to the ridge or attic.

The angle of inclination of the roof - the angle of the roof to the ground.

Roof area - total roof area with the exception of roof windows.

heating system - Type of heating provided for the project