Yes, you would need advice from a lawyer. The first thing a solicitor would
do is take a look at the deeds. If two
unmarried people buy
property jointly, it is desirable that they should spell out what their
interests in the property are. That might be stated in the deeds, or it
might be in a separate deed/declaration of trust.
As I
understand the position, if the deeds just say the property is held as
joint tenants, the presumption is that the shares are equal. But like any
other presumption, it can be refuted or displaced. The recent case of
Kernott v Jones has added an additional complication.
However if
you do nothing, he has little incentive to pay you or change the status
quo.
The remedy you have is to force a sale and I would say that does
look like a possibility. The sale might be postponed for a few months,
probably would be. But if, as I suspect may be the case, the property is
held as beneficial joint tenants, the presumption is 50/50 and you might be
able to use that as a bargaining chip to induce him to be co-operative.
But as I said - you have to see a lawyer if you want any progress.
Initial advice should not cost the earth.
LMM