When it comes to decorating, Pamela Holladay, ASID, and client Ellen Mason are kindred spirits. Both favor 20th-century modern classics; indeed, a version of Mason’s Knoll dining table graces the conference room at Seibert Architects, where Holladay manages interior design.

“Pamela and I both have kids who didn’t like modern as children, but are coming around,” says Mason, who with husband Henry selected Seibert to renovate their 1970s Siesta Key home. The complete remodel included new bathrooms, bedrooms, study, kitchen, lighting and finishes—all within the perimeter of the existing home.

But the Connecticut transplants say their living/dining area was most dramatically transformed. Holladay replaced outdated windows and doors with an expansive wall of contemporary sliders, then added oak flooring and a floating feature wall to create the illusion of an entry hall opposite the front door.

All this provides a minimalist gallery setting for the Masons’ vintage furnishings and Ellen’s own artwork: graphite drawings, oil stick paintings and some oils—many featured in a recent show at Art Center Sarasota as well as galleries back home.

The Vladimir Kagan sectional is as chic as it was in their Connecticut home for nearly 30 years. The internationally renowned designer’s sofa was reupholstered locally in Knoll fabric.

Danish superstar Jens Risom’s leather chairs are 20th-century classics that graced the Masons’ homes for years. The return to vogue of modern furnishings has increased their value.

Ellen Mason’s large graphite drawing dominates a floating wall added to block views from the great room to the front yard and create an airy faux entry-hall.

Both designer and client prefer unadorned wood floors; an almost white-toned oak is carried throughout the home to emphasize the new open plan and art gallery feel.

Treasured Pace Collection leather dining chairs and smoke gray glass table from Knoll are lit by a 20th-century classic paper chandelier purchased at Miami’s Luminaire.