Welcome to permies!
Apologies if I have misunderstood or missed something in your design, English is not my native language :)
Congratulations on your awesome urban design, you did a really good job!
Let me make a few comments here:
- you absolutely do not have to distinguish five Zones in your design. Due to a size of your plot, it is basically Zone 1 and 2, 3 the most, and a symbolic Zone 5
- is Zone 5 within the borders of your property, or it is rather a public zone? You could possibly convert your Zone 4 into Zone 5
- I would plan an easy, straight access to the porch and house entry
- We know, that you are planning to collect rainwater, however we do not know where an excess of this valuable resource goes when tanks are full. Each place where water collects should have a planned, safe overflow. In your case it can go to the pool or under the fruit trees.
- You can make a small plant nursery in order to raise many plants from seeds or cuttings, in order to reduce costs of buying plants substantially, and even make a small income in a future
- small urban gardens are ideal for vertical growing, also for vines on pergolas that block excess of summer sun
- there is still a lot of space for additional container gardening, especially around the pool and lawn
- in urban settings it pays off to think about the house - Zone 0 - as the most important element that consumes most energy and resources. It is fantastic that you have solar panels and that you are planning to install batteries. Have you considered other possibilities - greywater? heating with woodstove? bokashi composting?
- do you know a book
Retrosuburbia" by David Holmgren? If not, it might be interesting one for you.
All the best with implementation of your design, and please do not forget to take BEFORE and AFTER photos!