Mark Tolley, 51, fell nearly two metres through an opening in a scaffold on 5 July 2017 while working on the construction of six houses on Smarden Road in Headcorn, Kent.
He sustained several broken ribs and serious internal injuries including a punctured lung. He later died on 13 July 2017.
Tolley had been installing vertical hanging tiles on one of the new properties when he fell 1.8 metres through an unguarded opening in the scaffold and landed on the ground below.
An HSE investigation found Amberley Homes (Kent) Ltd, the principal contractor for the project, had not appointed a person with the necessary skills, knowledge, experience and training to manage the construction site.
The company had not ensured that a safe working platform on the scaffold was maintained throughout the different phases of the project. Access to and from the first lift working platform was unsafe as multiple openings had been made which could subsist for several weeks.
The openings were unguarded and therefore there was a significant risk of falling circa 1.8 metres from the working platform.
Amberley Homes (Kent) Ltd did not control the site effectively. Its monitoring was ineffective as it did not act on concerns raised by its safety consultant when he pointed out the problems to site management.
Amberley Homes (Kent) Ltd, of Sevenoaks entered a guilty plea to breaching safety regulations and was fined £25,000 and ordered to pay £83,842.34 in costs at Canterbury Crown Court.
HSE principal inspector Ross Carter said: “This tragic death could have been so easily avoided by implementing suitable site management to ensure that the scaffold was appropriately adapted by competent persons for the needs of the different subcontractors.”