whether service tax is payable on rent on residential properties ?

The Assessee has a residential property in india and lease to for using as a residential house. whether rent received on such property is service tax payable?

2. By oversite the assessee has collected service tax on the rental income ignoratnly and paid to the credit of Central Govt., for the period year April 07 to August 2007 can the assessee claim refund of the service tax which was collected and paid by oversite.