The owners of a home in Great Falls wanted to add functionality and appeal to their property with a pool and pool house. They tapped landscape architect Jay Graham to devise a master plan that would encompass “a pool, plantings, grading—and some kind of structure,” he says.

When architect Jim Rill was enlisted to design the pool house, the plans evolved. “What started as a screened-in space ended up including a full kitchen, sliding-glass walls, heating and cooling, lighting and a sound system,” Rill explains.

The owners requested a rustic aesthetic—and as much glass as possible. “The idea was to fit the landscape yet be unique enough to draw people in,” says Rill. Three walls of triple sliding-glass panels with retractable screens spill outdoors. The fourth wall, which anchors the kitchen area, powder room, changing room and storage, is clad on the outside in HardiePlank siding. Flagstone, used on the pool deck, also paves the pool-house floor.

Annette Hannon decorated the interior. “The owners wanted to be able to entertain year-round, and to limit the inevitable maintenance that goes along with outdoor living,” Hannon notes. “We came up with floor-plan options illustrating how the same furniture could adapt to their changing needs.” Stylish pieces from JANUS et Cie are upholstered in durable Perennials fabric, while a JANUS et Cie chandelier hangs from the vaulted ceiling.

In the kitchen, Hannon sourced Lynx appliances, including an indoor grill with an outdoor vent hood, refrigerator, ice machine and warming drawers. Restoration Hardware lighting in the kitchen area echoes the building’s rustic sensibility.

Architecture: James F. Rill, AIA, Rill Architects, Bethesda, Maryland. Interior Design: Annette Hannon, Annette Hannon Interior Design, Ltd., Burke, Virginia. Contractor: Thorsen Construction, Alexandria, Virginia. Landscape Architecture: Jay Graham, FASLA, Moody Graham, Washington, DC.