The price of any built-in is primarily determined based on four factors:
Materials: the type of wood will be used (plywood vs. solid wood), the species of wood (Birch, Maple, Red Oak, Cherry, White Oak, Walnut, etc.), the features such as the number of drawers, cabinet doors, counter tops, shelves, etc.
Labour: the amount of time required to build the unit(s)
Finish: whether the built-in will be stained or spray painted
Delivery and installation: bigger or more complex built-ins require more time to be installed
Each custom built-in project is different and requires different combinations of the four factors stated above. However, typically, built-in projects start at $3,500 and go up from there based on the size, scope, and choice of materials.