The company is planning to develop the plant, based in Maesteg, into a forum for high-tech cosmetics production by introducing new equipment and installing advanced manufacturing systems.
Stuart Meldrum, CEO of Cosi, said, "The overriding objectives behind this significant development are to ensure that we continue to deliver high quality and cost effective products and services to our customer base, whilst having the production capacity and flexibility to meet forecast volumes from a rapidly growing market."
The development comes following company plans to double its turnover in the coming three years, aims that would set it apart from other competitors in the industry and consolidate its lead as the main player, whilst aiding the company to boost its production by 100 million units.
Cosi has confirmed that the company believes the site will become the largest of its kind in Western Europe following the 9 million the company invested in the new development, with the support of the Welsh Assembly Government through regional selective assistance.
The site was previously owned by cosmetic giants Revlon and was acquired by Cosi in 2001, a move that has lead to the employment of over 700 staff.
Alongside the increase of jobs generated from the intended investment into the Maesteg site the company is due to remodel operations at its toiletries factory in West Sussex.
The company is gearing up to focus the factory solely on R&D and specialised production of premium, shorter-run products.
"Concentrating our volume production at Maesteg automatically provides us with economies of scale and even tighter and more consistent production management and quality control as part of our lean manufacturing and good manufacturing practice disciplines." Meldrum said.
Cosi has undertaken rapid expansion in recent years as it taps into the trend for brand owners to increasingly contract all aspects of manufacturing in a bid to centralize the process, increase synergies, and ultimately, save money.