Wallace expanded and remodeled the De Anza after World War II, removing most of the Pueblo Revival elements to give the motel a more modern appearance. The number of rooms increased to 55 and then 67. A cafe called the Turquoise Room, featuring a terrazzo floor inlaid with turquoise and silver pieces, and a basement conference room were also added. To decorate the conference room, Wallace commissioned Zuni artist Tony Edaakie to create two large murals depicting the Shalako festival. Completed in 1951, the murals are considered to be a unique example of such artwork.
Wallace sold the De Anza in 1983 and died ten years later. The motel changed hands several times and eventually went out of business. In 2002, a proposal by Albertsons to raze the De Anza caught the attention of the city, which began looking at ways to save the property. In July 2003 the city bought the motel for $891,000 with the intention of renovating it, working with developers between 2006-2010 in an unsuccessful attempt to re-use the property. As restoration work was never completed, the city sought a new developer in 2011, entering into partnership in 2012 with Rob Dickson for the $4.3 million project. After restoration and construction planned for July 2012 to March 2013 the historic motel property will host 39 residential cabanas, a swimming pool and clubhouse, a café, tourist information kiosk, museum and a Zuni art/jewellery store.
The building was added to the New Mexico State Register of Cultural Properties in 2003 and the National Register of Historic Places in 2004. In 2012, it was designated a Historic Landmark by the city of Albuquerque.