ITC on Factory building - Goods and Services Tax - GST

Respected experts, My query is in relation to ITC u/s 17(5) . One of my client is giving contract to build a factory. He is letting out this factory on monthly rent basis. I have 2 queries - 1) whether the contractor can claim ITC on inputs he purchased to build the factory? (Later the contractor will bill for the building construction). 2) Whether contractee i.e, my client will be eligible to claim ITC on what contractor has billed as he is going to let out the factory building on monthly rent basis?