In 2019 Karen co-designed and project-managed the refurbishment of a new public space in Chiswick, the piazza on Turnham Green Terrace with the launch of a new changing art project spearheaded by Sir Peter Blake, the W4th Plinth.

The area was transformed from a dingy space frequented by drop-outs and covered in litter to a focal point for the community with outstanding planting and tailormade benches.