Working on a bare-bones budget, the designers created an aesthetically cohesive back yard that offers its owner multiple pleasures - from soaking in a hot tub to grilling food. To this end, they devised playful interventions - such as a variously canted fence and rolling spa cover - that add movement and life to what was a claustrophobic space defined by looming concrete walls. The result is a lush, low-maintenance haven that inspires feelings of calm and well-being.With the inclusion of the hot tub, often considered something of an eyesore, the designers embraced the challenge of putting "banal" elements to new use. Encasing the prefab spa is an eight-foot square, steel-framed cover made of eco-sourced ipe wood, that appears almost to be inserted into the platform extending from the rear fence. When the tub is in use, this movable cover slides on tracks to become a waterside deck for sunbathing and toe dangling. It then zips along on stainless steel wheels forty feet through the garden and up to the terrace, where it doubles as a dining table - the literal interpretation of movement in the garden. Pausing in the middle, it becomes a three-dimensional frame for the plantings, which fit deftly within its volume. Even when the hot tub is uncovered, the steel plate that is fixed to its front continues to partially screen the spa from view while reflecting the tonality of dark fence.Also imparting a sense of movement to the space is the side fence, which conceals the original concrete wall mass and its oppressive verticality while adding a feeling of craftsmanship to the generally austere space. Variously sized off-the-shelf redwood planks were stained black and intermittently canted inward - adding visual interest even as its inherent horizontal quality lengthens the appearance of the garden. As evening approaches, lights placed between the fence and the wall glow like lanterns through the gaps, casting interesting shadows and softly illuminating the space. An outdoor grill embedded in the fence in the front of the garden is used at al fresco gatherings in warmer months.