On average, a retaining wall costs about $4,800 ... walls due to its durability and flexibility. Concrete blocks range from basic 12-inch by 6-inch units ($4 to $7 per unit) to more expensive ...

The key to installing a block retaining wall is preparing the ground for the first row. You should dig out a foundation area where the first blocks will rest. It should be about one inch deep for ...

Richard shows how to maintain a mini split; Mark and Jenn build a garden retaining wall ... will need to be wide enough to fit wall blocks and a four-inch drainage pipe. I'm digging eight inches ...