Thanks JimmyT.
I have discussed with the strata committee multiple times but they were still against it based on their personal opinions (without any expert advice). In fact I took this to the AGM but it was voted down. However I maintain that the refusal to consent is unreasonable so I have applied to NCAT for a tribunal hearing as the OC had declined mediation.
In addition to structural drawing and a Certificate of Structural Design and Existing Structure Adequacy Certification, I have also included a special by-law (provided to me by the strata manager). I am just wondering if there is anything else I need to include seeing it is a major renovation?