Hopefully they survive the relocation. It’s good that the development plan doesn’t impose any requirements. In our town, in my opinion, they went too far. I would tend toward climbing plants; over time, they can nicely shade the seating area or provide privacy in the summer. Without a huge canopy. A classic shrub, as a solitary plant, like a weigela, can grow quite large over the years. If trees, then columnar shape, whether columnar mountain ash or a columnar apple or really slow-growing varieties. I believe my magnolia takes 30 years to reach its 4 m height. You have gardening experience, you have free rein, and a mental image in mind. Just implement that. If something doesn’t fit, it simply has to go and be replaced.