When John Wolfskill died in 1913, his ranch was the most valuable piece of land between Beverly Hills and the Ocean. His heirs sold the 3,296 acre ranch to Broadway Department Store founder Arthur Letts, Sr. for $2,000,000 in 1919. Three years later, the Janss brothers re-purchased the land for $7,000,000. On the former Wolfskill Ranch’s most picturesque land, the Janss Investment Company prepared a 400 acre estate district known as Holmby Hills. The lots ranged from 1 to 4 acres each. Finally, all the houses had to cost at least $25,000, $5,000 more than the minimum in Bel Air. In 1925, the estate sites hit the market.

In the 80’s, JBN sold Aaron Spelling 594 South Mapleton. It was the first residential sale in the United States over $10,000,000. In 1999, JBN sold 461 Faring for $12,500,000 and 10231 Charing Cross for close to $15,000,000. JBN has made 32 sales in Holmby Hills. Considering there are only around 200 homes in the area, JBN takes pride in this fact. JBN has made eleven sales on South Mapleton Drive.