East Bay mansion built by former A's and Seahawks owner listed for $7.5 million

A Blackhawk mansion owned by developer Kenneth Hofmann, who once co-owned the Oakland A's and Seattle Seahawks, is on the market for $7.488 million.

Living room with atrium in the middle.
A Blackhawk mansion built by Kenneth Hofmann, former owner of the Oakland A's and Seattle Seahawks, has been listed for $7.488 million (Open Homes).
Chef's kitchen with translucent bar top.
A Blackhawk mansion built by Kenneth Hofmann, former owner of the Oakland A's and Seattle Seahawks, has been listed for $7.488 million (Open Homes).

Hofmann originally built the 80,000-square-foot property in 1986; since then, the house has undergone nearly $6 million in upgrades.

Master bedroom with separate terrace.
A Blackhawk mansion built by Kenneth Hofmann, former owner of the Oakland A's and Seattle Seahawks, has been listed for $7.488 million (Open Homes).
Sitting area with views of the hills.
A Blackhawk mansion built by Kenneth Hofmann, former owner of the Oakland A's and Seattle Seahawks, has been listed for $7.488 million (Open Homes).

These include a personal wing for the main bedroom, a chef's kitchen and a wine cellar. The backyard offers a catering kitchen, a pergola with mounted flat screens, a pool and a spa. There are quite a few panoramic views of the adjoining golf course and hills.

Pool and spa with hill views.
A Blackhawk mansion built by Kenneth Hofmann, former owner of the Oakland A's and Seattle Seahawks, has been listed for $7.488 million (Open Homes).
Pergola with mounted flat screens.
A Blackhawk mansion built by Kenneth Hofmann, former owner of the Oakland A's and Seattle Seahawks, has been listed for $7.488 million (Open Homes).
Terrace with table football table.
A Blackhawk mansion built by Kenneth Hofmann, former owner of the Oakland A's and Seattle Seahawks, has been listed for $7.488 million (Open Homes).
Outdoor fire pit overlooking the golf course.
A Blackhawk mansion built by Kenneth Hofmann, former owner of the Oakland A's and Seattle Seahawks, has been listed for $7.488 million (Open Homes).

The property was purchased in 1997 by Don Kingsborough, former president of Atari and former head of retail at PayPal. He can be the previous CEO of Worlds of Wonder, where he created the favored talking teddy bear Teddy Ruxpin. He lived in the home until 2000.

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