Boulevard Gardens Historic District, located in Salt Lake City, Salt Lake County, Utah, was constructed 1929-31. The district is locally significant under Criterion C in the areas of Architecture and Landscape with a period of significance that spans the development’s period of construction (1929-31). Boulevard Gardens is significant for three reasons. First and foremost, Boulevard Gardens is the most architecturally substantial and intact garden suburb constructed in Salt Lake City with a collection of twenty-three small Tudor Revival-influence period cottages, all of which are contributing. The city is home to other “garden suburbs,” but none of these is as extensive or architecturally substantial as Boulevard Gardens. Secondly, the development represents the collaborative work of important Utah architect Slack Winburn and developer Robert Burt “Frogie” Nowell. Slack Winburn ranks as one of Salt Lake City’s most inventive twentieth-century architects and many of his buildings, including the Clift Building (NRIS #AD82004139), Pacific Northwest Pipeline Building (NRIS #10001159), First Unitarian Church (Salt Lake City East Side Historic District) and the Mayflower Apartments (South Temple Historic District), are already listed on the National Register of Historic Places. Nowell was a prominent developer in Salt Lake City and his plan placed Boulevard Gardens at the Avant-garde of early twentieth-century urban expansion. Finally, Boulevard Garden’s history reflects key trends that swept the United States at the onset of the twentieth century. Such trends include the “Better Homes Movement” with its accompanying emphasis placed on American home ownership, as well as the automobile-driven suburbanization that allowed home ownership to become a key component of the American dream.