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Table 31. Allocation of new housing units by plan designation, Eugene, 2012-2032 Plan Designation Source: ECONorthwest Note: Single-family attached dwellings and structures with two to four units in commercial designations are assumed to develop at the density assumptions used for medium density plan designations. Structures with five or more units in commercial designations are assumed to develop at the densities assumed for high density plan designations. In addition to estimating needed mix, Eugene is required to estimate the needed density for housing produced over the 2012 to 2032 period. Table 7 and Table 8 present the actual density achieved over the 2001 to 2012 period. To re -cap, Table 8 shows the following average development density by Comprehensive Plan Designation: • Low Density Residential averaged 5.4 dwelling units per net acre. • Medium Density Residential averaged 13.4 dwelling units per net acre. • High Density Residential averaged 32.6 dwelling units per net acre. With Eugene's needed housing mix (55% single-family detached and 45% multi -family), Eugene's residential density would be 7.8 dwelling units per net acre. The change in housing mix results in an increase in the average development density of 0.5 dwelling units per net acre for new development, a 7% increase. Shifting the housing mix would provide opportunities for development of a larger share of multi -family housing. As a result, the City would meet its identified need for development of more multi -family housing at urban densities and additional housing affordable to households at all income Part 11 — Eugene Housing Needs Analysis ECONorthwest Page 115 Medium High Low Density Density Density Housing Type Residential Residential Residential Total (DU) Percent of Units Single-family detached 97% 3% 0% 100% Single-family attached 17% 53% 30% 100% Two to four units 27% 68% 5% 100% Five or more units 0% 30% 70% 100% Number of Units Single-family detached 8,059 249 0 8,308 Single-family attached 205 640 362 1,207 Two to four units 490 1,233 91 1,814 Five or more units 0 1,133 2,643 3,776 Total 8,754 3,255 3,096 15,105 Percent of Units 58% 22% 20%1 100% Source: ECONorthwest Note: Single-family attached dwellings and structures with two to four units in commercial designations are assumed to develop at the density assumptions used for medium density plan designations. Structures with five or more units in commercial designations are assumed to develop at the densities assumed for high density plan designations. In addition to estimating needed mix, Eugene is required to estimate the needed density for housing produced over the 2012 to 2032 period. Table 7 and Table 8 present the actual density achieved over the 2001 to 2012 period. To re -cap, Table 8 shows the following average development density by Comprehensive Plan Designation: • Low Density Residential averaged 5.4 dwelling units per net acre. • Medium Density Residential averaged 13.4 dwelling units per net acre. • High Density Residential averaged 32.6 dwelling units per net acre. With Eugene's needed housing mix (55% single-family detached and 45% multi -family), Eugene's residential density would be 7.8 dwelling units per net acre. The change in housing mix results in an increase in the average development density of 0.5 dwelling units per net acre for new development, a 7% increase. Shifting the housing mix would provide opportunities for development of a larger share of multi -family housing. As a result, the City would meet its identified need for development of more multi -family housing at urban densities and additional housing affordable to households at all income Part 11 — Eugene Housing Needs Analysis ECONorthwest Page 115