Service tax on reimbursement

We, the Pvt Ltd company (supplier of decorative, indoor, outdoor light fittings) taken Farm House on lease for display of Goods and other business activities. We also sub-lease the same Farm House to Third Party and reimburse the expenses from Third party in following manner: 1) Lease Rent : 50% 2) Electricity Bill : 50% 3) Telephone & Internet : 50% 4) Security Charges : 50% 5) Common Staff Salary : 50% Now please advise us, whether Service Tax is applicable on above reimbursement?