all you need is a 2" / 3" hole saw. 18v drill, a dead bolt and a screw driver i just added one in my g/f's moms house cuz she kicked the dad out! in all honsty it took about 30min, but im vary literate when it come to home repair, E-literate when it come to under the hood! just dont say anything to the land lord.. he/she might have somthing to say about it... just do it and when you leave, leave the keys with the land lord! i also would put a chain lock for while your home and sleeping!