Terrace Herringbone 3.7 x 3.7 m – DIY Plan

DIY plan for building a 3.7 × 3.7 metre terrace with a herringbone deck pattern. The herringbone layout turns what could be a plain rectangular deck into a feature in its own right — the diagonal lines pull the eye outward and make even a modest terrace look more generous and intentional. Despite the visual complexity, the pattern is built from a single board profile, so the shopping list stays simple.

The plan is written to handle most ground conditions. For low terraces the frame can sit directly on paving slabs or paving stones; for higher terraces or sloping plots, the frame rests on support posts mounted to concrete plinths. Where one part of the plot drops away, the two approaches can be mixed in the same build. The substructure is dimensioned for outdoor use in pressure-treated pine, with joist spacing set to support both the herringbone deck boards and the foot traffic of an outdoor dining area.

The DIY plan is delivered as a digital PDF, downloadable immediately after purchase. It includes scaled drawings of the substructure and the deck pattern, a complete shopping list with timber dimensions, a cutting list, and a step-by-step assembly guide that walks through both the frame and the herringbone pattern. The build is rated medium — the frame is straightforward, but the herringbone pattern rewards careful measuring and clean cuts. Most builders complete the terrace over two to three weekends, ending up with a deck that becomes the social centre of the garden.