If you don't want to get dirty and pull cable from that room there is also option of powerline network adapters.
Something like this : https://www.amazon.com/s/ref=lp_490499011_nr_n_3?fst=as%3Aoff&rh=n%3A172282%2Cn%3A!493964%2Cn%3A541966%2Cn%3A172504%2Cn%3A490499011%2Cn%3A1194444&bbn=490499011&ie=UTF8&qid=1481914055&rnid=490499011