Sorry,
I'll be away from home for a few weeks- I'm in the UK for work.
I have one side supported on my roof-
so the "legs" on that side are 9" long into the plastic "feet" which come with the kit. These are bolted to steel brackets which I secured to the roof with lag screws.
the un-needed legs I reused on the other side supported on the concrete rv pad beside the house. I cut these so that the entire frame would be level.
I don;t live in a HOA.
The previous owner of my van did live in a HOA...he wasn't allowed to park at home, so was renting covered storage.
I suppose that would be an option for the OP
Mike