Emergency services were called to Spensley Walk, Stoke Newington, Hackney, N16, after a man suffered serious injuries following a fall on scaffolding.
A large emergency presence was reported in the area as police, fire crews, and ambulance teams worked together to ensure the safe extraction of the injured individual.
Authorities are now investigating the circumstances surrounding the incident, including whether health and safety measures were in place at the site.
Anyone who witnessed the incident or has relevant information is urged to contact the Police who are understood to be investigating the matter.