The slightly sunken circulation spine becomes another playroom in winter, too. "There's scooters up and down here but they can't damage anything," says Delwyn, pointing out the polished-aggregate concrete blocks and pale American oak floor. With the swimming pool at eye level, the long sunny spine doubles as a gallery for Brent's art collection.
Brent and Delwyn love cooking and entertaining, so the German-designed kitchen anchors the spacious open-plan living area. The waterfall island is clad in Corian, while stainless steel folds under cupboards to become a clever baking corner. The kitchen and living area open on to the front terrace. "We actually use this a lot in winter, with the ceiling heater and the barbecue out here," says Delwyn.
There are more harbour glimpses from the terrace, plus a wall of glass sliders on to the private central courtyard.
Slim louvres cool the house all summer. In winter, a gas fire glows and rich velvet curtains at the hallway help retain the heat.
There's more indoor-outdoor living in the rear pavilion, with the playroom opening on to another service courtyard and vege garden. Delwyn got that proper laundry, as well as two bedrooms and a spacious bathroom complete with sculptured oval bathtub.
She and Brent can retire to their upstairs eyrie and admire the expansive view. "We sleep with the doors open and wake up to the view," Delwyn says. Off the walk-in closet, the en suite's oversized copper-coloured tiles reflect the colours of the harbour.
At street level under the living area, the architect has incorporated a guest suite that could become a home office with its own bathroom and kitchenette. "Grandparents visit for long stays," says Delwyn, "so we wanted somewhere private for them." Brent's large wine cellar provides an overflow sleeping area for guests' children, too.
From the street, Brent's favourite touch has become a local landmark: a huge keyhole window in the oversized steel door. "Brent worked with sculptor Mark Hill to design the door. The builder was beside himself installing it."
The rest of the house's wide weatherboards and battened front terrace pay homage to the surrounding bungalows. Just metres from the hub of buzzing Westmere, the house has been a dream project for Brent and Delwyn. They now want to downsize and explore a country lifestyle dream.