ADU Contact Information

For questions regarding ADU regulations (i.e. size, setbacks, height, landscape, etc.):

Planning Department
909-395-2036
PlanningCounter@ontarioca.gov

For questions related to building codes or the permit submittal/review process:

Building Department
909-395-2023
BuildingCounter@ontarioca.gov

For questions related to easements as well as water/sewer utilities:

Engineering Department
909-395-2025
EngCounter@ontarioca.gov

For questions related to development impact fees:

Community Development
dif@ontarioca.gov

For questions related to fire code requirements:

For questions related to power utility requirements:

For questions related to gas utility requirements:

Downloadable Files