A commercial building permit is required for the construction, expansion, alteration or repair of any structure used for commercial purposes. This could be anything from the construction of a new office or retail facility to adding a wall or even a couple of outlets in an existing tenant space. The commercial permit process also covers the conversion of an existing structure previously used as a residence into a commercial use such as an office.
Work that would not require the issuance of a permit are projects such as painting, floor coverings and replacement of end-use plumbing or lighting fixtures where the plumbing or electrical infrastructure is not modified.