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.

Not that I know a great deal about plants (yet) but you may want to include what your climate is and location (shade of a building part of the day or direct sunlight) as this will effect peoples recommendations. for our area (hot sun, sandy soil), we are going for Crepe Myrtles and screens of jasmine and passion fruit vines for narrow spaces.

there are way too many colours going on here. Your home is a traditional style and yes the cream and green are traditional colours with the reddish brick however why did you put grey around the windows??also you have red scollops above the grey and it doesn't do the house justice. What colour was there before you painted the grey?? considering grey is a more modern colour I think you were attempting to modernise the externals. in saying that the roof would have been better to paint charcoal the cream in white and then the grey and then the driveway would be done in a grey stain. but if you leave it the way it is and cover the red scolloping above the windows the same grey and the bricks below the windows near the ground grey as well then get the drive way restained to the reddish colour of the bricks on the house and then it would blend more and look inviting.

I would start by removing all the concrete block walls, lattice work and pool fences to give you an idea of the space and opportunities available. You have a long driveway so replacing it will be a major cost, depending on the type of material you use, so you should probably start getting quotes to get a feel for the options out there. You need to think about how you propose to use the space, the privacy and the amount of security you need to your front garden. Do you need a childproof/dog proof fence and gate? Also consider how much time, effort and expense that you are prepared to put into maintenance of your garden as this will affect the design and choice of plantings. A more formal garden will need a lot more work than a garden with a more natural feel. Finally think about your climate, amount of rainfall, amount of frost and other environmental factors that will affect the survival of new plants. Do you need to allow for an automatic watering system, or will you be selecting plants suitable for a dry climate? Look at the type of plants that have thrived in your neighbourhood. It would be worthwhile establishing a budget and having a chat with a local landscape design professional who is experienced in your area. Best of luck, Dr Retro of Dr Retro House Calls