Ayesa designed the new clubhouse with a braced steel frame supporting the roof and precast first floor. Foundations are driven piles taken through filled ground to the underlying London Clay. The facility is built on the site of a former gravel pit backfilled as an uncontrolled tip. Ground improvement was used for the sports area and comprised excavation, sorting and replacing soils to provide a stable base for the track. Surface water is attenuated in a drainage layer beneath the track and pitches before discharging to the Thames.