Do I have to have a biopsy before I have surgery for bph?

Typically no.... A prostate biopsy would often be performed to help rule out the possibility of prostate cancer in a patient with an elevated psa. Surgery for BPH might be indicated if signs of urinary obstruction were present. Your urologist would be able to clarify your particular situation.
It depends. As a general rule, a prostate biopsy is not required prior to having a procedure for bph. However, if there is an elevation in the psa (prostate specific antigen) level and/or an abnormality on prostate exam, then your physician may recommend performing a biopsy first - particularly if a diagnosis of prostate cancer may impact the course of treatment.