In Renting of Immoveable Property service there is a specific exclusion for the property which has been used as Boarding houses. Since the property has been used as geust houses by your company. It falls under the specific exclusion of Renting of immoveable property service and hence Service tax is not applicable Properties are not liable for service tax under Renting of Immoveable property:
i. Renting of immovable property by a religious body or to a religious body
ii. Renting of immovable property to an educational body, imparting skill or knowledge or lessons on any subject or field, other than a commercial training or coaching center.
iii. Land used for educational, sports, circus, entertainment and parking purpose and
iv. Building used solely for residential purpose and building used for accommodation, including hotels, hostels, boarding houses, holiday accommodation, tents, camping facilities.
so, service tax applicable for your case.
Regards
Ashok