I like the contrasting surfaces but not gravel because of Charlie. I also like the trelliswork on the right-hand wall. Chairs with cushions around brazier in small urban garden, clipped box balls, Mespilus germanica
I'd use flowering shrubs rather than evergreens, a few different kinds, and arrange them in a reverse symmetry.] A long, thin garden with plenty of room for puppy to play and lots of privacy from the neighbours.
Garden Design Ideas : Narrow Garden Space of Townhouse This very narrow space on the side of a townhouse is made more interesting by using an interesting paving pattern with tiles and pea gravel, plus a variety of plants in pots.
Vegetable boxes incorporated into small yard. Note the trellis at the back of each bed. This would be very pretty along the back and provide a place to attach vines and fruit branches - like the stone path around the garden