Using a shovel mark the ground where the retaining wall will be built.
													
																	How to build a small concrete block retaining wall. 
									
	
		
	
																	How to build a concrete wall figure a. 
																	Whether you re building a retaining wall or just need some extra privacy a cinder block wall is an affordable way to get the job done. 
																	Drive long wooden stakes into the ground at each end. 
																	A retaining wall must provide a way to release the water that builds up in the slope behind it. 
															
													
									
	
		
	
																	Without a pressure relief system the weight of the water in the soil would crack or even buckle the wall. 
																	Tall wall excavate a trench deep enough to accommodate 4 to 6 in. 
																	If the distance is greater than 8 drive additional stakes so that the gaps do not exceed 8. 
																	Of compacted base 1 in. 
															
													
									
	
		
	
																	The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block. 
																	Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on. 
																	Of leveling sand and half the height of the first course of blocks. 
																	Block retaining walls are generally the same as freestanding block walls but with a few important differences.