It represents the highest reported figure given out by any of the London boroughs, the Croydon Guardian reports.
Fireplaces by Heals was commissioned to install a new fireplace at a property in Essex in February 2012.
The unnamed employee suffered a fractured skull when he was hit by a steel beam while working for United Milking Systems at Brookley Meadows Farm in Derbyshire in July last year.
According to the Surrey Comet, Jacek Rozanski sliced off part of his finger when using a woodcutting machine with a circular blade while he worked for Rosso Joinery.
According to the Health & Safety Executive (HSE), in 2008-09, 35 people died after falling from height as part of their work duties.