For Home office expenses the looking for an example on how to calculate the Size of work space. The example on the CRA site's calculator reads    All   finished areas   within the home count towards the size of the home. This includes: hallways bathrooms kitchen You can measure this in square metres or square feet.   I looking for clarification on  finished area. Should that include bed rooms, sun rooms, dining rooms or just the common area used during employment at home? Depending on rooms include affects the credits calculated.   ... View more