An exemption beyond 31st January 2026 can be arranged under extenuating circumstances. This must be confirmed in writing by NZGBC. Updates to the building code (specifically H1 5th edition), finalised in November 2023 will require insulation levels to match or exceed the insulation requirements of Homestar v4.1 for heat loss. However the ventilation requirement of the building code have not changed, nor is there any requirement to consider the risk of overheating. In order to manage the reputational risk to Homestar, to incentivise improved design where possible, and to inform home occupants, NZGBC requires the following as a condition for granting an extension to the submission date of Homestar v4.1 projects: 1. A risk assessment of overheating is to be carried out. This should be done in accordance with CIBSE TM59, or similar. 2. The submission must included a summary report of the overheating risk assessment. The report should also include any planned or possible mitigation measures. Project teams are reminded that projects may be upgraded to Homestar v5 at any stage prior to submission, at no additional cost. Every effort should be made to fulfill the performance objectives of Homestar v5, which may include the application of further TQs.