I have a office in my mother house and paying rent to my mother?
GST would be applicable on RCM basis as it is a taxable supplies.
Explaination :As per section 9(4), supply of taxable goods or services or both from unregistered supplier to registered supplier, on RC basis, recipent will be liable to pay tax in relation to such supply.
if you hire labour from an agency and it is registered, then RCM not applicable
If you just hire a labour, and has employer and employee relation, GST is not applicable as it is neither a services or goods as per Sch III