Specification documents are necessary to build a garden accurately, to the intended design and detail; they dictate exact measurements, materials and standards of construction of the garden. The amount of information needed depends on the complexity of the project. Specifications include, tender documentation (or quotes), setting out plans, construction drawings (where necessary) and a written specification document.

Specifications are used in two ways (i) to obtain competitive quotations from a number of approved landscape contractors and (ii) to provide all the information required for the chosen contractor to build the garden.