Flintshire County Council has put the £33m redevelopment of Theatr Clwyd out to tender.
The major revamp to help secure the long-term future of the 1970s site will be funded by Flintshire County Council, the Arts Council of Wales and Welsh Government.
The project includes the complete strip-out and refurbishment of the existing buildings and the new build construction of a timber foyer extension and carpentry workshop.