Nice racks ! Ignore the thumbs. Yes, council rules are different everywhere... if your neighbor complains, sock him !

I'm sure you're mates with the neighbors anyway ! Yours (top pic) is easy open storage, for boards with fins...
Here's a really simple vertical racking system, slightly more suited to shortboards, or SUP's under 9'6 if your ceilings are under 9'6 ! I'm lucky, my garage is 10'6 high. But the Naish 14 is strung up to the ceiling joists.
I painted a piece of 3x2 (75x50) (paint is optional

), and bought some 20mm dowel, and used a 20mm drill bit, then the dowel pieces just jam in there. If slightly loose use some tape, or wax (not glue, so it remains easy to unassemble one day). Then screw it to the wall. Actually, I screwed to wall, then inserted in the dowel. The rack does not carry any weight, and the dowel just acts as spacers between boards. Some cheap foam at the base to protect noses and tails is also good.
Cost, was probably about $30-$40 odd, for a racking system that receives about 15 boards. Cost might be $10-$15 for 4-5 boards.