Developers are aiming to have construction complete by late 2018.
There are 22-foot ceilings in the living and dining rooms.
On the second level, views from the home lead right out onto the ocean.
Floor-to-wall windows make up much of the home.
"North Beach/Surfside is an up-and-coming area, and I think the penthouse is a good investment," Hafner told The Wall Street Journal.
All together, there's 16,500 square feet of space.
The home has six bedrooms and seven bathrooms.
The penthouse takes up the 17th and 18th floor, along with the roof.
Units in L'Atelier start at $3.1 million, and 87% of the units have already been sold.
