Diversity of housing types

Intent

To enable citizens from a wide range of economic levels and age groups to live within a community.

Requirements

Include a sufficient variety of housing sizes and types in the project such that the total variety of housing within the project, or within a ¼ mile of the center of the project, achieves at least 0.5 according to the following calculation, which is based on the Simpson Diversity Index using the housing categories below.

The Simpson Diversity Index score is calculated with the following equation:
Score = 1- ∑ (n/N)²,

where n = the total number of dwellings in a single category, and
N = the total number of dwellings in all categories.

Housing categories are defined for the purposes of this calculation in LEED for Neighborhood Development as:

1. Detached residential large - (greater than 1200 sq. ft.)
2. Detached residential small - (less than 1200 sq. ft.)
3. Duplex or townhouse - large (greater than 1200 sq. ft.)
4. Duplex or townhouse - small (less than 1200 sq. ft.)
5. Multifamily dwelling in a building with no elevator - large (greater than 750 sq. ft.)
6. Multifamily dwelling in a building with no elevator - small (less than 750 sq. ft.)
7. Multifamily dwelling in a building with elevator four stories or fewer - large (greater than 750 sq. ft.)
8. Multifamily dwelling in a building with elevator four stories or fewer - small (less than 750 sq.ft.)
9. Multifamily dwelling in a building with elevator more than four stories and fewer than nine stories - large (greater than 750 sq. ft.)
10. Multifamily dwelling in a building with more than four stories and fewer than nine stories - small (less than 750 sq. ft.)
11. Multifamily dwelling in a building with elevator nine stories or more - large (greater than 750 sq.ft.)
12. Multifamily dwelling in a building with nine stories or more - small (less than 750 sq. ft.)
13. Live/work large (greater than 1200 sq. ft.)
14. Live/work small (less than 1200 sq. ft.)
15. Accessory Unit – large (greater than 1200 sq. ft.)
16. Accessory Unit – small (less than 1200 sq. ft.)

Townhouse and live/work units may be ground related and/or within a multifamily or mixed-use building.
Double counting is prohibited. Each dwelling may be classified in only one category.