The revamp contract includes cleaning floors, walls, ceilings, doors, and removing dust and cobwebs.
Existing pictures, decorations, signs and notice boards are also to be removed.
The Home Office confirmed the barracks formed part of its plans to end the use of hotels as asylum accommodation.
A spokesperson said: “We are furious at the level of illegal migrants and asylum hotels.
“This government will close every asylum hotel. Work is well under way, with more suitable sites being brought forward to ease pressure on communities.”
They added: “We are working closely with local authorities, property partners and across government so that we can accelerate delivery.”
The Home Office said asylum seekers would be subject to conditions that they must report back to the site every evening.
It said all sites would comply with safety, security, health and wellbeing standards.
Highland Council said it had received no information from the UK government on whether the revamp would require planning consent.
