What about Bird of Paradise. Mass planted. They will grow snout 4-5 feet tall itch the flower spikes standing above that. They are as tuff as nails, love tropical conditions. Have an Asian contemporary feel about them. Are very sculptural. Interesting foliage and amazing flowers. You can plant Xanadu philodendrons between that will act like a sub layer and fill in the gaps with their own interesting leaf formations. On that front corner where your stack stone and letterbox are I would keep it low and simple for the posties access. Mini variegated lomandra as that will highlight the darkness of the wall. Try to get in as much good soil as you can before you plant as it looks like it's clay, if so dig in some gypsum. Great soil equals happy plant.

Check this company out for ideas https://www.breezway.com.au/gallery/using-louvre-windows-with-curtains-or-blinds/

Hi Nicky, great house, you could do glass with a timber trim, very stylish, vertical slats, or metal with a timber trim any of those would compliment your lovely house.

Standard stumps required. You will need engineer to do testing and design. Want get a building permit without it. Talk to a local one who is familiar with conditions