|The Bayles Addition Historic District (Figs. 1-4; Photos 1-13) is locally significant and meets National Register Criterion A for community planning /development and Criterion C for architecture. With respect to Criterion A, the district is a well-preserved example of a post-World War Two suburban residential subdivision, laid out with specific building size and construction cost requirements as well as racially-driven ethnic restrictions which, in the minds of the original developers, assured a non-diverse ethnic character on the part of those who would own homes in the district. With respect to Criterion C, the district consists of a cohesive and unbroken concentration of Ranch- and Minimal Traditional-style domestic architecture that is interrupted only by two Colonial Revival-style houses and one house executed in the Tudor Revival style. The period of significance of the district begins in 1948, the date which marks the platting of the subdivision and extends to 1965. The closing date of the period of significance is two years past the conventional National Register 50-year guideline, an extension that is permitted since the character of the development in the mid-1960s was no different from that which was occurring in the early 1950s. Indeed, only one house dates from the late 1960s and two from the 1970s. The Bayles Addition Historic District is associated with two of the historic contexts set forth in the Lee's Summit MPDF. The historic contexts associated with this district are Residential Development: 1860-1960 and Architectural Styles and Vernacular Property Types: 1860-1960. The associated property type set forth in the MPDF and found throughout the Bayles Addition Historic District is Single-Family Residential Property Types, circa 1865-1960 and Suburban Subdivision Property Types, circa 1920-1960. As noted in Section 7, this district also represents the property type Post-World War II and Early Freeway Suburbs described in the National Register MPDF "Historic Residential Suburbs in the United States, 1830-1950." This MPDF formed the basis for the National Register Bulletin Historic Residential Suburbs: Guidelines for Evaluation and Documentation for the National Register of Historic Places.