Outside tap in townhouse

Good evening all. I desperately want to fit an outside tap in our rear garden. Easily enough I hear you say! Unfortunately we live in a 3 storey townhouse and the only water supply is in the kitchen on the 1st floor. Can I run a pipe from the kitchen, outside, and down to the garden? I know I will need to insulate the pipe and empty the water each winter. Just want to check if it's doable or not. Thank you in advance