Wind turbine foundation (1) comprising an annular base plate (2) comprising a supporting surface (3) and defining a central hollow (4) by at least an inner lateral surface (6). The central hollow (4) further comprises a lower surface (5) arranged at a level lower than a level of the supporting surface (3). In particular, the central hollow (4) has a dimension (D), defined by the distance between at least an inner upper surface (10) and the lower surface (5), established such as to allocate additional equipment between both surfaces. A method of constructing said wind turbine foundation (1) is also described.