Installing bath room in old basement tapped into cast pipe and am 2 inches above concrete gra?

sixe is app 10 ft by 6 ft,, should i pour concrete os raise floor with 2by 4 and plwood which would be most cost effecyive thanksInstalling bath room in old basement tapped into cast pipe and am 2 inches above concrete gra?
it doesnt really matter what ever you feel more comforable doing.Installing bath room in old basement tapped into cast pipe and am 2 inches above concrete gra?
i would think raise the floor with 2x4 would be better for you.makes things easy.and would look nice since it is in the basement