A custom built-in is a unique piece of furniture that is designed and built to fit seamlessly into a specific space, such as a wall or alcove. Custom built-ins can be designed in various styles, such as bookshelves, cabinets, desks, and entertainment centers. The process of building a custom built-in typically involves measuring the space, designing the piece to meet specific needs and requirements, selecting the materials, cutting and shaping the pieces, and assembling the components. Depending on the design, custom built-ins can include features such as doors, drawers, shelves, and lighting. A custom built-in can provide an attractive and functional storage solution that can greatly enhance the look and functionality of a room.