The £22m Project Arizona involves building new facilities for patients with brain and spine conditions and is due to start next year.
A new three storey unit will include an expanded neuro rehab unit and a new centre for the UK-leading pain management programme.
New wards, two operating theatres and a clinical trials unit are also being built within the existing building where doctors hope to be able to make advances in the treatment of brain and spinal injuries.
Interserve worked with architect Gilling Dod and used Passivhaus principles to use construction materials and processes that will make the finished building as energy efficient as possible.
The scheme’s project manager, Steve Jenkins, of Turner and Townsend said: “Interserve’s approach has been organised and controlled. The way the evolving design/costs have developed to include the additional requirements, whilst still maintaining the original programme intent, has been first class.”
The new stand-alone building will be located on the north east corner of the Aintree/Walton NHS campus.