I have a 13m (l) by 5m (w) west facing garden in London, we are in a terraced victorian house with back to back gardens. Two weeks ago our neighbour at the back took out all their trees, including a very mature 10m high oak trees, leaving our garden & house completely exposed.
At the back of our garden we have a small patio area that is approx 3m wide, which butts up against a 1.8m wall and a small 1.8m shed. I was planning on taking down the shed so that we have some soil to plant into. I ideally need to put the tree in the middle of the back wall to provide the most privacy.
I am looking at evergreen trees to grow to approx 4 -6m high to give us enough privacy, it would be in full sun, but is quite sheltered as all the other gardens on our side have large mature trees (cherry/apple/pear/oak).
I am concerned about growth of roots damaging the patio area.
Any ideas - so far looked at possibly getting a mature 3m tree - either photinia red robin, magnolia grandiflora, holm oak or holly full standard. But I don't know how much root space they need.