Should we sell a house before or after the divorce.

It is unclear what you mean by "mutual" -- uncontested?  Joint petition?  In either event, unless there is so much equity that it would make a difference for tax reporting (consult your CPA), it makes little difference, if you are inagreement, whethe the house sale is pre- or post-divorce -- just make sure the escrow instructins are crystal clear about who is to get what money.  It might make sense for you to consult a family law specialist to be sure you are doing what you should be doing about that and all other assets.