Something like silver birch trees don't take up too much room but will provide some height and interest. Personally I pick out natives, after asking local garden centres for those which are natural to my area. I've used black mondo grass across the front of my walls with purple fountain grass behind it. The fountain grass really takes the summer heat, doesn't need much water and self-seeds. It's grown slightly taller than me after a few years. I have, what I call a 'survival of the fittest' garden. Over the years, I've experimented with all sorts of plants. Eventually, only those that survive with little help, and almost no extraneous watering, get to stay. One of the key things I did when planting out my garden was to dig down into the soil and lay a mat of used, natural-blend carpet underlay (not the more synthetic types used these days). Just ask someone getting rid of their old carpet- it's easy to come across. Above the carpet underlay I added water crystals, then put the soil back on top. After the gardens have been established, I haven't need to get the hose out since. I do have lots of succulents around the place, some native plants and ornamental grasses. I hope this helps.

Biggest Thank you to everyone who has commented and given me such good practical advice for updating my little front patio/porch area. Before I depart again and forget to update? This is how it looks, I am probably at a later stage going to work out how to add a wider sill as suggested, however it does look so much better than before. Such timely advice has given me the motivation to get it done. I have left the roller shades on one side just to allow a bit of privacy from the neighbours and wind/sun. And one day will swap the large couch for something more suited.

If you can put doors on the whole back area and deck or pave out to a functional size for entertaining - be sure to have as close to same height as inside and the whole width of the house if possible. You could do the pergola which looks gorgeous and makes a cozy feel. On top of the pergola you may be able to do a weatherproof retractable awning if you do not want a permanent covered area. That would make a whole area for indoor outdoor entertaining in all types of weather. You can still have a step down area to grass and plants at the rear. Travetine is great and easy to hose down. You do not have to concrete them down use pavers on a good road base. You would have to speak to the experts about how to get the right height - also be sure to have a slight fall away from the house.

Looks like the drain that the down pipe goes into isn't working as it should, over flows before water enters the drain. Love the random pavers, these could certainly be reused adding a few more to replace the bricked area all on one level as this would enable a better space for outdoor table and chairs. The pergola is tired and would be great if as you mentioned could be raised up a bit, depends on what the Body Corporate will allow, a couple of see through panels inserted above next to the building would help with light. A BBQ kitchen on the back wall, plus I would try to re swing the door back to it, the door gets in the way as it is, can it open inwards opposite the sink. Certainly keep the garden beds it will help soften all the hard surfaces, taller planting along the boundary will also add privacy cheers