This will be taxed in the hands of the employee who receives HRA.
The calculation for HRA depends upon the place of residence of employee.
By applying the provisions of sec 10(13A), the least of the amount will be exempt from the actual HRA received, thus taxing the excess portion after exemption, if any, in the hands of the employee.The main criteria to claim HRA is that the employee should have paid rent during the relevant period. And for claiming exemption of HRA, salary for the purposes of HRA should be taken for the respective period for which the employee was residing in the rented premises.
As far as this case is concerned, there wont be any tax implication in the hands of the employer.There need not be any assumption as regards the ownership status of the house that the employer claims.