The single-storey facility will sit in the grounds of the historic Leahurst country house on the Wirral peninsula and will double the faculty's current capacity.
Hidden behind a 100m curved sandstone wall, the new building will link up with an existing equine hospital and will provide state-of-the-art operating and imaging suites as well as a consultation centre for small animals.
Describing the scheme, a spokesman said: 'Two corridors lit by horizontal roof lights run parallel to the sandstone wall.
'These physically separate the reception and patient areas at the front from the wards, theatre and imaging wings to the rear, allowing natural light and ventilation deep into the building plan, responding to the sustainable strategy of the site.'
The practice, which is running the project out of its Manchester office, was chosen to design the new building back in 2004 following a competitive interview.
Work is expected to start on site next month and is due to complete in December 2006.