Do I need a permit for a short retaining wall in Pomona?
Not if it's 2 feet or less from the bottom of the footing to the top of the wall and holds nothing extra up, because the city's building code exempts walls that size. That changes when there's added weight above it, like a slope, a driveway or a building, or when it holds back flammable or combustible liquids. A block wall no more than 2 feet above the lowest ground beside it, with no load above, is exempt too, and the city's permit guidance covers the rest.





