Supermarket close to the centre of Barcelona

For your attention the two- storied commercial premise of 1600 m2 (800 m2 + 800 m2, located in the L'Eixample district, between El Clot and the famous Basilica of Sagrada Familia. The space is rented by a chain of supermarkets (only the ground floor). The contract is until 2022, but a tenant wants to continue with a rent for 20 years more. 

Is its possible to increase profitability if you rent another floor. 

Profitability from the rent (annually): 126.000€ (5%)

Community charges (1.212€) are paid by tenant.

IBI Property tax is 276.57 euros annually 

Mortgage:  1.138.000 euros (till July, 2030)