I just looked it up on Googlemaps. The wall the OP is talking about is the OUTSIDE of the wall that is behind CYV homes on Dominguez Dr. and Ramirez Ave.
If it's like District 2 ...... the outside portion of the walls are District responsibility and there is a schedule for maintenance.
Call District Property Maint. and find out.
Those two Groups of Villas share their own pool so may have some form of Association. I doubt it is for the cleaning of walls, especially the OUTSIDE PORTION!
De La Mesa North and South