The rehabilitation of this important 1924 Frank Lloyd Wright-designed National Register building, a collaboration of Wiehle-Carr and Eric Lloyd Wright, was acclaimed by the American Institute of Architects as “a beautifully done, impeccable restoration that was extraordinary in scope, given its disastrous condition.” All portions of the building that were severely damaged in the Northridge earthquake and by long-term water-driven deterioration—the concrete "textile block" walls and collateral structure, especially a 130 foot long by 24 foot high section fronting the motor court, dining room and chauffeur’s quarters—were replaced using sensitive techniques and engineering strategies that will ensure the long term survival and aesthetic integrity of the building, listed for 2004 by the World Monuments Fund among the 100 most endangered sites "… [valued] as supreme creations of humankind." Phase 1 work began in the summer of 2006 and was completed, fall 2007 at a cost of over $6,000,000.