Water Mill Building Supply’s millwork range contains mouldings, windows and doors that are especially suited to the unique tastes of the Hamptons and Long Island’s east end. New builds or home renovations, we have an experienced team and the capacity to fulfill every need of your project. Those wanting to browse are encouraged to visit our extensive showroom located on the Montauk highway half way between Southampton and Bridgehampton.

mouldings Mouldings

Elegant and stylish mouldings in a multitude of types, profiles and materials.

Windows Windows

Specializing in custom made windows that define beauty and functionality.

Doors Doors

Interior and patio doors utilizing high-tech, low maintenance custom designs.

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