Service tax & vat applicability on interior works

Good morning,

One of our clients are providing services relating to "Interior works" including purchase of material, fitouts and all the civil works, I wanted to know the service tax & VAT applicability - is it taxable under works contract? please even help me regarding the varoius options available to the client

Moreover, its not possible to seperate the material & labour portion

Awaiting for an early reply !!