Upper Mount Royal was developed beginning in 1910 as a planned elite residential district by the Canadian Pacific Railway's land division, which controlled the elevated land above the existing city and deliberately reserved it for large-lot residential use. The neighbourhood was designed from the outset for Calgary's most prominent families: oil executives, financiers, lawyers, and the city's founding merchant class. Early estate homes along Prospect Avenue SW and Lansdowne Avenue SW were designed by prominent Calgary architects in Tudor Revival, Georgian, and Prairie vernacular styles, many of which remain standing today as designated heritage properties. The Mount Royal Community Association, established in the early 20th century, has consistently advocated for the neighbourhood's low-density character and architectural standards. Through Calgary's oil boom cycles of the 1970s, 1980s, and 2000s, Upper Mount Royal absorbed successive waves of renovation and new construction investment, each generation adding contemporary estate homes alongside the original stock while preserving the ridge-top setting, mature tree canopy, and signature oversized lots that define the neighbourhood's physical identity.