Do I need a building permit if I build retaining walls to terrace my landscape on a hillside?
Yes, if the walls exceed 4-feet in height measured from the bottom of the footing to the top of the wall and always if supporting a surcharge/load retention.

No, a building permit is not required if it is not supporting a surcharge and is less than 4-feet in height and meets the offset of 1:1 ratio. IRC Section 105, Reference Bulletin #8.

Other regulations may apply; Ask a Permit Technician.

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1. Do I need a building permit if I build retaining walls to terrace my landscape on a hillside?
2. When do I need a permit to build a fence?
3. How close can a fence be to road intersection?
4. Do I need a permit to replace my bulkhead?