3.17.2.1 — Change of Use and Compensating Construction

(1) Where proposed construction will result in the change of major occupancy of all or part of an existing building to another major occupancy, the building shall be classified as to its, (a) construction on the basis of its construction index as provided for in this Part, including Table 11.2.1.1.A., and (b) occupancy on the basis of its hazard index as provided for in this Part, including Tables 11.2.1.1.B. to 11.2.1.1.N. (2) Small or medium sized existing buildings as determined in Tables 11.2.1.1.B. to 11.2.1.1.N. facing multiple streets may be assigned a hazard index credit of 1, which may be subtracted from the hazard index of the proposed major occupancy to reduce the additional upgrading required by Table 11.4.3.4.A. provided, (a) the building does not contain a Group B, Division 1, a Group C, or a Group F, Division 1 occupancy, and (b) firefighting access complying with Articles 3.2.5.1. to 3.2.5.5. or Subsection 9.10.20. is provided. (3) The requirements of Articles 3.2.2.20. to 3.2.2.83. do not apply to this Part.

(1) This Section applies where proposed construction, (a) in respect of an existing building will result in any of the following changes of use of all or part of the building: (i) a change of the major occupancy of all or part of a building that is designated with a “Y” in Table 1.3.1.4. of Division C, (ii) a suite of a Group C major occupancy is converted into more than one suite of a Group C major occupancy, (iii) a suite or part of a suite of a Group A, Division 2 or a Group A, Division 4 major occupancy is converted to a gaming premises, (iv) a farm building or part of a farm building is changed to a major occupancy, (v) a building or part of a building is changed to a post-disaster building, (vi) a building or part of a building is changed to a retirement home, or (vii) the use of a building or part of a building is changed and the previous major occupancy of the building or part of the building cannot be determined, or (b) in respect of an existing building of combustible construction will extend the building by adding a storey or storeys such that the extended building will be more than four storeys in building height. (2) For the purposes of this Section and Sentences 11.4.2.1. (1) and 11.4.2.5. (4), the changes of use set out in Subclauses (1)(a)(ii) to (iv) and (vi) shall also be deemed to constitute a change in major occupancy. (3) The requirements of this Section are in addition to the requirements of other Parts of this Division as they apply to the proposed construction.