I also use "tomato cages" made out of 5' lengths of concrete reinforcement mesh, which is much like steel welded wire fence with heavy wires every 6" x 6". Bend it into a tube, cut the bottom ring off, and stick the points into the dirt so it's 4 1/2' tall.

Or you could run for chairman of the homeowners association and change the rules. Or maybe you don't belong in that kind of environment.

If they don't approve trellises, are you sure they want vegetables in your yard.

I would build it out of wood or rebar, both of these materials blend in more. Nothing shiny or bright / white.

Try the link below

Good luck.