You should have a restriction on the sale - you IP will know about it.
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
As recovering has said, the IP should have a restriction placed on the property and will be alerted. If there is no restriction due to an oversight ( it does happen) and you sell and they later get wind of it, the IVA will fail and creditors could bankrupt you and reverse the sale. Ultimately you could find yourself in front of the beak on fraud charges.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk
Do you recall signing an RX1 form at the start of your IVA? This places a restriction on your property that will essentially notify the IP if a sale is attempted.
If by some admin error the IP has not placed a restriction; tread very carefully. It'll still be in your T's and C's and the IP and/or the creditors may have it in their power to petition for your bankruptcy etc for undeclared disposal of an asset.
If you were planning to offer the funds in settlement, the IP would ask for proof of origin of funds for anti money laundering reasons, so again; that leaves you open to them finding out.