Interior trades are everything that remains to finish the inside of the house. These include HVAC, plumbing, electrical, drywall, flooring, paint, cabinetry, fixtures and appliances. These items make the home and are one of the key reasons to not get stuck with “contractor grade” (cheap) fixtures, cabinetry. and finish materials. Replacing these items later or worse, taking the change order from a general contractor results in additional costs that you don’t need to bear, 

Interior trades are the bulk of the work. This is where everything comes together.