A big unknown is who can be considered a suitable trades person when we need something looked at and fixed. The advice from the Department of Building and Housing is to choose a Licensed Building Practitioner (LBP).
The LBP scheme, which is administered by the Department of Building and Housing, is designed to confirm that building practitioners are competent, and provide confidence to building owners. All LBPs are accountable for what they do via a complaints procedure operated by the Building Practitioners Board.
The Department of Building and Housing has a list of LBPs throughout the Canterbury region. You can find it here.
Background information about the LBP scheme can be found here.