In June 2017 CAST was awarded a substantial grant from Arts Council England’s Small Capital fund. The grant of £499,999 was the maximum that can be awarded through this scheme, enabling CAST Café to become a full-time operation, supporting improvements to the public areas of the building, and creating new studios in parts of the building that had not previously been used.

The project was undertaken in two stages. The first stage, including the creation of a kitchen for CAST Café, refurbishment of the café space and the addition of new French windows and a terrace, began in January 2018, to be ready in time for the opening of Groundwork at the beginning of May. The second stage of work began after the close of Groundwork and was completed in 2019.

In addition to support from Arts Council England, the renovation project was supported by grants from Cornwall Council and Monument Trust and by funding from Helston Town Council and the Helston Downsland Trust. Fund-raising continues to undertake further renovations and improvements.

The outline design was prepared by the London-based architectural practice Cooke Fawcett Architects, which was founded in 2015 by Oliver Cooke and Francis Fawcett, both of whom formerly worked with Herzog & de Meuron Architects on major UK and international projects including Tate Modern. Cooke Fawcett’s scheme provided the basis of the successful application to Arts Council England.

CAST appointed Alison Bunning to develop and deliver the project. Known for her award-winning work at Kestle Barton, Alison Bunning is a respected conservation architect, who has undertaken work on a broad range of historic buildings. She worked with Trevor Humphreys MRICS, a project manager and quantity surveyor who specialises in challenging grant-aided projects in the cultural sector in the South West.

In 2023 ‘CAST rehabilitation phase two’ was awarded £705,374 from the UK Government through the UK Shared Prosperity Fund. The award was made by Cornwall Council, which has been chosen by Government as a Lead Authority for the fund and is responsible for monitoring the progress of projects funded through the UK Shared Prosperity Fund in Cornwall and the Isles of Scilly. Work will commence in 2024, including the replacement of roofs, the installation of solar panels and essential renovations to the public areas and access routes to the building.