18 Great Design Ideas for Small City Backyards. I like the bench built into the wall
Steel L-shaped pergola | Neil Architecture
outdoor spaces, raised bed along the back
Excellent use of the small space - the use of the bench on the side is great for adding extra seating without taking up extra space. You could include a pond or a vegetable garden along the back fence (instead of the garden bed).
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The private, wooden deck with built-in seating. Photo: Vanguard Properties / SF