buying duplex behind apartment building

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hello BP. 

I am looking at a duplex in my town and was interested in making offer but I just found out that right behind the duplex, they are building 235 unit apartment that is 4 story. 

That basically block all the view and maybe not privacy for tenant. Also I am concern about the competition from the apartment. 

Would you buy it ? what piece of information I need to better help with decision.