2000 Heights of rooms and spaces in new dwelling units and new residential occupancies are required to conform to Table 9.5.3.1.
Habitable space includes living, dining, sleeping and kitchen areas.
Non-habitable space includes laundry, workshop, storage or games rooms, but not sitting rooms. Where no changes are proposed to the use or construction of an existing basement, the existing basement headroom may be retained provided the basement is used solely for non-habitable space and does not provide access to exit from other floor areas. No further relaxations will be available on the above headroom requirements except that District Building Inspectors may accept localized minor deviations in non-critical areas. Per W. M. Johnston, P.Eng.