Originally constructed and modestly expanded over the course of the 1910s and 20s, this fish shack just off the main drag in Amagansett never benefited from the oversight of a consistent master planner. The result was a hodge-podge of tiny rooms under a low-slung ceiling with an irresistibly salty appeal.

We gutted the 520-square-foot cottage and reprogrammed its interior, creating two identical side-by-side bedrooms. Privacy is afforded by sliding partitions in lieu of swinging doors.

We installed a bathroom with a lavish stall shower and gave the bathroom more space with pocket doors.

An outdoor shower accommodates a second bather.

We opened up the kitchen/dining area to permit fluid circulation into the living area.

We expanded the structure's livable space by creating three exterior "rooms", a sundeck for lounging, a patio for grilling, and a pergola-shaded loggia for dining.

To give the cottage a roomier feel, we removed the existing low ceilings and clad the existing gable shape in pine shiplap. We refenestrated the entire building.