09 Feb 2005 to the Present
From 2005 to 2009, the property continued to be run as a 3-par golf course and driving range.
In 2005, the public became aware of the change of ownership and plans to remove the golf course and more densely develop the property. Through much work at each stage, including the environmental review process, the public made known it did not support such a change.
On June 25th, the City Council voted to designate an acre of oak trees for HCM status and the Tuna Canyon Detention Station site became Historic Cultural Monument #1039.
The Council in the same action established a working group to begin the process of memorializing TCDS.  This group eventually became the Tuna Canyon Detention Station Coalition.
Snowball West Investments, the owner of the property filed a lawsuit against the City of Los Angeles to remove the HCM designation. That lawsuit was dismissed and thus the historic designation stands.
The owner filed applications with the City for numerous approvals needed for the construction of its planned 215 housing units. All were approved, but on December 12, 2019, the City Council denied the zone change. In response, Snowball West filed a lawsuit against the City. The Superior Court rejected the lawsuit and Snowball West filed an appeal. That appeal is still pending.