Shortly after listing their roughly 8,500-square-foot home for sale, John Legend and Chrissy Teigen have purchased a 10,700-square-foot spread in the Benedict Canyon area of Beverly Hills for $17.5 million, according to a spokesman for the property’s listing agent.

The property was recently completed by California developer JB Builders, records show. Situated on a knoll overlooking the city, the six-bedroom house has marble and wood details, 24-foot-tall ceilings and sliding glass walls, according to the listing. It has a double-sided fireplace flanked by a formal dining area and a casual family room, a gourmet kitchen with a polished marble reflective wall, a home theater, a bar and lounge with mahogany accents and a temperature-controlled wine cellar.

John Legend and Chrissy Teigen

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The master suite has suede panel walls, wide-plank white oak floors and a balcony.

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The grounds include a 100-foot-long saltwater infinity pool, a pool house, a sunken fire pit and a landscaped motor court.

In an interview last month, Mr. Legend said he and his wife were moving because their family is growing; Ms. Teigen is pregnant with the couple’s third child. As a prospective family of five plus Ms. Teigen’s mother, who lives with them, they needed more space, he said. They listed their prior home for $23.95 million.

The couple wasn’t immediately available for comment on their most recent purchase.

Sally Forster Jones of Compass represented the developer in the sale, while Marshall Peck of Douglas Elliman represented Mr. Legend and Ms. Teigen.

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