Carefree, By Design

Slide 1 of 12,

The architect Elizabeth Roberts and her husband, Michael McKnight, a physician, pictured poolside with their son, Dean. The couple bought and renovated a weekend house in Bellport, N.Y.

Eric Striffler for The New York Times

Carefree, By Design

To create a place in Bellport, N.Y., with a low-stress vibe, a Brooklyn architect used a few simple tricks.