Albert Barnes Commentary Leviticus 14:13

"and he shall kill the he-lamb in the place where they kill the sin-offering and the burnt-offering, in the place of the sanctuary: for as the sin-offering is the priest`s, so is the trespass-offering: it is most holy:" — Leviticus 14:13 (ASV)

It is most holy - See Leviticus 6:25 note.