Audit risk of revaluing land and building

Sir

If there is an audit risk that : Company has a policy of revaluing land and building / Company has a policy of revaluing its L&B and these valuations have been updated during the year

For its explanation can we say that : There is risk that land and building may be overvalued or undervalued in financial statement

For its response can we say that : Hire the service of an expert to ensure that assets are properly valued as per IAS 16