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A building permit is required for all new, replacement and or repaired retaining walls as defined by the California Building Code CBC 105.2 building 4 and the California Residential Code R105.If the wall is supporting a surcharge no matter the height, it will require a building permit.

A retaining wall is a structure built to retain a difference in ground level. While a retaining wall can serve as the footing for a fence, the wall itself is not considered to be a fence and is covered by different laws.

Permit requirements vary from city to city, but generally anything involving construction will need a permit.Permits are also required for substantial interior or exterior remodeling, plumbing work, and electrical work if it requires structural changes or the cost of the project exceeds a certain amount.

You need a building permit for all construction that involves the construction, reconstruction, alteration, repair, movement to another site, removal, or demolition of any building or structure. All electrical, plumbing and mechanical work needs a separate permit for each trade.

In the unincorporated Los Angeles County area, a freestanding fence or block wall may be constructed up to a height of six (6?) feet without a permit. However, if the wall is to retain any soil, a permit may be necessary.

A retaining wall is a strong structure that is made to keep a hill, slope or mound of earth in place.Due to the weight of the earth behind the wall, a retaining structure must adhere to high construction standards.

Therefore, permits should be pulled only by the parties doing the work. Written authorization must be given to allow any other agent to act on behalf of the contractor or homeowner doing the work. Homeowners may request and receive an inspection at any time, free of charge.