What are the requirements for retaining walls?

Exterior retaining walls shall be limited to five feet in height, unless it is visible from off site, in which it shall be no higher than 3 feet. (Design Guidelines ID11.2) The horizontal depth of the terraces between stacked retaining walls should be a minimum of twice the height of the larger adjacent wall (Design Guidelines ID11.4). Retaining walls should be built a minimum of three feet from a property line (Design Guidelines ID11.5). An application to the Design Review Board is required if any exceptions to the above guidelines are requested.

For more information, please refer to the Town of Moraga Design Guidelines document.

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1. Do I get a grading permit from the Contra Costa County Building Department?
2. When is a grading permit required?
3. When is a grading permit required?
4. What do I need for a grading permit?
5. Why do I need a hillside development permit?
6. What are the requirements for retaining walls?
7. Do I need a permit to haul dirt from my grading project off site?
8. Can I remove the vegetation from my property in preparation for grading?
9. Are there any design restrictions on grading?
10. Are there any precautions that should be taken before digging?