Many people chose to finish or remodel their own bathrooms, so there are many things to consider when doing this. Construction permits are required. A homeowner may perform the construction work on their own property where they reside without a contractor’s license. Additional permits are required for any mechanical, electrical or plumbing work to be completed. If the home is owner-occupied and a single family dwelling, the homeowner may be issued the mechanical, electrical and plumbing permits as well. If the home is a duplex or multi-family dwelling, subcontractors will need to be hired for these trades.