The River Oaks lists $13 million penthouse

Renderings of the penthouse at The River Oaks, the 19-story high-rise under construction on Westheimer. The 79-unit building will have three penthouses. One of which will be listed as the most expensive luxury condominium ever in Houston at $13 million. less Renderings of the penthouse at The River Oaks, the 19-story high-rise under construction on Westheimer. The 79-unit building will have three penthouses. One of which will be listed as the most expensive luxury ... more Photo: Arel Capital Photo: Arel Capital Image 1 of / 81 Caption Close The River Oaks lists $13 million penthouse 1 / 81 Back to Gallery

The River Oaks, a 19-story high-rise under construction on Westheimer, has listed a $13 million penthouse, possibly the most expensive and largest penthouse unit ever listed for sale in Houston.

A 1960s-era high-rise apartment building on Westheimer near River Oaks is being renovated into the upscale condo tower to open in 2017. About half of the 79 units have been sold, including one of the three penthouses, according to the developer, New York-based Arel Capital.

The "Grand Penthouse," the $13 million, 13,000-square-foot residence occupies the entire top floor and features 14-foot ceilings throughout, direct elevator access and two private terraces.

The east and west penthouses each offer 6,500 square feet on the 18th floor with 12-foot ceilings throughout and a large outdoor terrace. These penthouses are listed at $6 million.

Construction began in December 2014 and the project is slated for completed in fall 2017. Move-in will begin next spring.