Which type of disputes is the Building Code Commission (BCC) NOT authorized to hear?

The Building Code Commission (BCC) is specifically designed to address disputes related to the compliance of technical requirements established in the Ontario Building Code, as well as issues that arise during the permitting process and site inspections. Its mandate focuses on technical matters directly linked to building construction, safety, and related compliance.

Disputes surrounding property ownership, however, fall outside the BCC's jurisdiction. These issues typically involve legal property rights and titles, which are better addressed within the realm of property law and relevant legal courts rather than through the BCC's specialized focus on building code conformity and technical compliance. Therefore, the BCC is not authorized to hear disputes concerning property ownership, making it the correct answer to the question.

The other options relate to the BCC's functions, where it can assess compliance with technical requirements, the duration of permit processing, and the timing of site inspections as they relate to the building code.