The Different Kitchen Cabinet Grades Kitchen cabinets are categorised in four main grades based on the quality of their construction. These are:  Ready-to-Assemble (RTA) kitchen cabinets Stock kitchen cabinets Semi-custom kitchen Cabinets  Custom kitchen cabinets Go for the most solid type of kitchen cabinet construction you can realistically afford. Look for value for money, taking into account the kitchen cabinet quality, your lifestyle, and the estimated length of time you intend to actively use your kitchen cabinets.