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Exhibit 11: Total Housing Units, Louisville and Comparison Geographies, 2021 <br />Source: ACS 5-Year Data Tables, 2017-2021 <br />4,790 8,665 10,085 12,944 40,908 45,304 139,302 <br />Superior Louisville Erie Lafayette Longmont Boulder Boulder <br />County <br />Housing Unit Mix <br />As shown in Exhibit 12 Exhibit 12, most housing in Louisville (67%) is detached single-family, the <br />second highest share among comparison geographies, behind Erie (89%). Just above 20% of <br />Louisville housing units are in a multifamily building with five or more units. Of remaining Louisville <br />housing units, 9% are considered "plex housing", referring to single family attached units up to <br />fourplexes. <br />Exhibit 12: Housing Mix, Louisville and Comparison Geographies, 2021 <br />Source: ACS 5-Year Data Tables, 2017-2021 <br />Superior <br />% <br />13% <br />27% <br />Longmont <br />3% <br />15% <br />20% <br />Lafayette <br />22% <br />14% 5% <br />Erie <br />89% <br />4% 6% <br />Boulder <br />39% <br />15% 43% <br />Boulder County <br />59% <br />13% <br />25% <br />Louisville <br />67% <br />9% <br />22% <br />0% <br />10% 20% 30% 40% <br />50% 60% 70% 80% <br />90% 100% <br />Single -Family Detached <br />Plex Housing (1 to 4 units) <br />Multifamily (5+ units) <br />Mobile Home or Other <br />Residential Development Trends <br />Exhibit 2 shows the change in total housing units from 2011 to 2021. Louisville is one of the slower growing <br />geographies in the county, with an 11% growth of housing units from 2011 to 2021. Given the increase in the <br />number of high -income households over the time period, the limited amount of new housing is likely also <br />contributing to high housing costs as wealthier households are able to outbid on limited stock. <br />17 <br />Louisville Housing Plan Part 2: Housing Needs and Market Assessment <br />