Four areas are designated Special Development Areas (SDA) on the 2020 General Plan Land Use map. They are Loma Rica Ranch, North Star, Kenny Ranch, and the Bear River Mill Site. The first three have been subject of annexation agreements between the City of Grass Valley and the respective owners. Annexation agreements have resulted in the allocation of acreage to various land uses, and a fixed number of housing units to be allowed. A study has been completed that evaluates the market/fiscal/job-housing impacts of these four SDAs.