Preservation of Cultural Heritage by Augustus O. Brown, the eighth owner of the house (1968–1980). In August 2005, the house was returned to its original name, and the Trust for Preservation of Cultural Heritage was renamed the Ennis House Foundation. It was during the long ownership by the Foundation from 1980 to 2011 that the house was used as a filming location, establishing it as one of the most famous houses in Los Angeles. On June 19, 2009, the Ennis House Foundation announced that the house was being offered for sale with an asking price of US$15 million. Finding no buyers in a down economy, the price was steadily reduced, until it was sold to business executive Ron Burkle for just under $4.5 million on July 14, 2011. A condition of the sale is an easement that allows public viewing 12 days per year, a condition binding on subsequent buyers. By December 2018, it was listed for sale at $23 million. In 2019, Burkle sold the house for $18 million. Restoration Even before its completion the Ennis House was marked by structural instability. Concrete blocks had cracked and lower sections of the walls buckled under tension. The use of decomposed granite from the site to color the textile blocks introduced natural impurities to the concrete mix, and combined with air pollution caused premature decay. Attempts to apply a protective coating caused additional problems. More damage occurred due to the 1994 Northridge earthquake and the record precipitation during the 2004–2005 rainy season. The Ennis House Foundation had estimated that it could cost US$5 million just to stabilize the building, and US$15 million for full restoration. After the rains the building was briefly red-tagged as "no entry" but was down graded to yellow- for limited entry by late 2005. At that point significant damage to the retaining wall at the southern rear of the building remained. In 2005 the house was added to the National Trust for Historic Preservation's list of the "11 Most Endangered Historic Places". In 2006 a Federal Emergency Management Agency (FEMA) grant was issued, as well as a US$4.5 million construction loan through First Republic Bank, which restarted restoration efforts. The project included a new structural support system, restoration or replacement of damaged blocks, restoration of windows, and a new roof. Restoration work was completed in 2007 at a cost of nearly US$6.4 million. No announcement was made