The service, part of the Office of the Deputy Prime Minister and set up to handle household rent and leasehold disputes, is currently looking for PR support for three years with an option to review after two.
The decision to hire a firm has been taken to better communicate and raise the service's profile among its target groups, which consists of landlords, leaseholders, residential tenants and the legal profession.
The successful consultancy will also assist PR efforts at a local level.
There are five regional rent assessment panels, which are quasi-judicial bodies to settle disputes.
There is no designated in-house PR service, although local panels are assisted by the central corporate PR unit.
The unit's business manager Carol Davis said: 'There are a lot of people who perhaps don't know about us or the work we do.'
The successful applicant will report to the service's deputy director Martin Tooley.