You will firstly need to tell your IP that you wish to sell so they can remove the restriction placed on it.
Any equity will go towards your IVA. You will probably be allowed expenses towards estate agents fees and other expenses.
If you manage to pay off your total debts in full then anything left will be yours but otherwise you will continue on with monthly payments.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
If you have enough equity to repay creditors then it is likely that you would have to do so in the event of a sale. Some proposals allow you to keep 15% of the property's value which would cover relocation costs, deposit and rent in advance so check the terms of your IVA.
If you sell your house without a variation order in place then ALL of your equitable interest will have to be paid over into the IVA unless and until all debts, interest and costs have been paid in full.
I strongly suggest you do not do this without a variation order.
How long do you have left to do on your IVA?
How much are your monthly contributions?
How much equity do you have?
Why do you want to sell the property?
(Apologies for so many questions but this is so I can give you a bit more advice)