Tiny rented yard - help needed!

[RenardeRenarde]

Hi all, I have recently moved into a nice little rental, unfortunately an extension on the back of the kitchen has left the house with a teeny tiny yard.
How can I make this a lovely space to sit in without doing anything too permanent?
I can't paint the fences (they belong to the neighbours) or do anything like relay the flags.
So far I have emptied the shed thingy so I can hide the bins in it and powerwashed everything.
I would love a garden that attracts bees and butterflies, I also have a cat so anything we put out MUST be cat safe.
I've added some pictures, as you can see it's a mixture of sun and shade, the photo was taken around 2pm but it gets some sun for most of the day. I'm thinking pots (how do I get height without using the fences??) and maybe bunting, plus a small bistro set for sitting out?

You can get planters with trellis attached like this other than that, yy to bistro set, bunting and solar powered fairy lights (I'm a sucker for them!)

tall pots with trellis wigwam of canes inside. make sure your pots are lightweight as when filled very heavy.
Tall narrow planters are good but quite expensive. Or much cheaper you could get planting bags to put at the back for tall plants then pretty pots in front to create a cottage border effect.

Put polystyrene bits in the bottom of pots and planters to help drainage and it makes them lighter to move. Dark grey or black plastic pots are cheap and look better than the green or terracotta ones.
Have A couple of structural plants such as Japanese Acer, small fir or Caster oil plant to give height. They will all do well in pots.
Maybe a small solar powered water feature?

Meant to say, have a look on Pinintrest at v. Small gardens/ yards for inspiration.

Also reference to pots was for the plastic kind!
Just thought Bamboo in a pot would give you structural height.

Have a look at specialist clematis nurseries on line, you can get ones that ate a few feet tall, that flower for most of the summer. They do well in pots, and I've just stool a bit of trellis on the ground behind the pot, and leaned the top against a fence.

Even though you can't paint the fences, if you want some splashes of background colour behind containers for planting you can paint wood panels and place them up against the fences.