The victim from Birmingham was working on the refurbishment of a retail unit at Centaurus Business Park.
He fell around 15ft from scaffolding on Monday morning.
He was taken to Southmead Hospital but died from his injuries.
DI Dave Lewis said: “This is a tragic incident in which a man fell from scaffolding while fitting a large glass window. His family have been informed and are being supported at this very difficult time.
“We’ve been working closely with our colleagues in the Health and Safety Executive, who are assisting with our enquiries, to establish what happened.
“We want to appeal to anyone who was in the area of Centaurus Business Park on Monday morning, who saw or heard any part of this incident, to come forward and speak to us.”