The build-out tested: no single building era

The name course of Pass IV-2 (the street pattern's first printing, South Bend East quadrangle portrayed 1958, published 1959, at secondary strength); ACS 2020–2024 five-year estimates, MCDC profile rendering, section H3 (year structure built, universe 44 estimated units); the older-vintage rendering discussed in the pass note as conflict C19

The street pattern is on the map by 1958 — but the houses were not all built in one moment, and the survey will not let the build be told as a single subdivision's moment. The name course established the frame: the town's streets and name first attach to this ground with the federal quadrangle portrayed in 1958, over farmland the record had left unnamed since 1836. If a single developer had platted and built the neighbourhood in one postwar campaign, the survey's year-built table would bunch in one or two decades. It does not. The current vintage's distribution prints whole (44 estimated units): built 1939 or earlier, 10 (22.7 percent); 1940–49, 2 (4.5); 1950–59, 2 (4.5); 1960–69, 8 (18.2); 1970–79, 10 (22.7); 1980–89, 8 (18.2); 1990–99, 3 (6.8); 2000–09, 1 (2.3); 2010 or later, none — that is, computed from the same table, 45.5 percent of the estimated stock dates to 1950–1979, 27.3 percent predates 1950, and 27.3 percent is 1980 or later, with the rendering's secondary carriers putting the median year built at 1970. The pre-1940 block is the table's surprise: at face strength it would put a dozen older houses on the ground before the street pattern was mapped — farmhouses of the section's farm century absorbed into the streets, or estimation noise at a universe of 44, or both; the record reached does not separate them, and the honest verdict prints instead: the neighbourhood accumulated across decades, with a mid-century centre of gravity, and was not built in one era. The caution that governs the whole table is printed in the pass note as conflict C19: an older survey vintage's rendering counts the town at 62 units with a materially different year-built split, so at this size the distribution is vintage-bound estimation, never a count of houses — the shape (spread, mid-century-weighted, still growing slowly into the 1980s) is what survives both vintages.