The custom closet’s cost depends mainly on the design and the customizing process of building it. Some of the factors that may affect the cost are the size, overall design, accessories included, style and finishes. You may want to add a jewelry drawer to your closet or a cabinet lighting. These accessories can be added to your custom closet for around $50 to $200. The finishes that will be used to your custom closet may vary and can significantly affect the cost of the closet that you want. A typical white laminate closet costs around $125 per linear foot. So a mere 20 linear foot closet will cost you $2,500, all taxes and installation fee included. An average 35 linear foot closet with simple design costs around $4,375. If you want more intricate designs and accessories included in your custom closet, they can cost around $874 up to $4,375.