Plan showing a building floor with interior divisions, dimensions and use of existing and proposed rooms. An existing floor plan and a proposed floor plan are required. If dealing with a room in a building containing other rooms, a key plan must accompany the floor plan and must specify the area of the proposed room and the total building area. Modifications to the structure and distances between the emergency exists must be indicated on the plan. These plans are used to verify the project's compliance with the National Building Code and with the zoning by-law. The plans may be hand-drawn by the owner, although the measurements must be exact. (Example - commercial) (Example - Residential)