changing title

What would be the costs involved in changing a title from DP to strata?
I'm just about to exchange contracts on a duplex but have realized some difficulties lay ahead in the future if I want to refinance for future purchase of IP's. Has anyone had experience of this sort?
Have a chat to you core team - solicitor, mortgage broker, accountant. They should be able to provide you with all the relevant information & costs.

Wishing you every success, Ana