Rare opportunity! The HE-C zoning designation in Contra Costa County is a housing-focused district created to ensure certain parcels can develop residential projects at defined densities in compliance with the county’s Housing Element and California housing law. Residential housing at the specified density for that parcel Accessory dwelling units (ADUs / JADUs), Small residential care facilities, Small family or large family childcare homes, Supportive or transitional housing (small facilities),Each parcel in the HE-C district has a specific density range (units per acre) assigned by the ordinance 17 to 30 units per acre. Check with Contra Costa County on all questions regarding allowable uses.