I guess my previous post was a bit confusing. You can see I am new to this. My rental house is on 2 titles. I am hoping to either sell off the other block or perhaps build units or a house. I have made enquiries with the council and it appears I don't have to do much except provide a carport and space for 2 cars on the land where the house stands as the other block has a double steel garage that could either be removed or left on the block if a buyer wants it. I must admit to being a bit suspicious about the advice as it seems all too simple? Do not even have to erect a fence! The council officer told me all that had to be done was to have the 2 titles "split off the deed." I have no idea what this means and made further enquiries with the state titles office and they could not tell me what it means either. Perhaps my accountant. ? 

I was hoping someone may have some ideas on which would provide a better income, selling the block or building on it myself? 
Thanks again
samjames

Thanks jaffasoft for your reply. I have heard from another investor that 8.8% plus GST is high. The property I am worried about is handled by an agent who hasn’t given me a lot of faith in them – whe I bought the unit I gave it to them to manage and they didn’t pick up that the tenant had given notice (even though they were the selling agent – a good lesson for me NEVER to assume) so it wasn’t advertised as available unitl the tenant had moved out. They then told me it was advertised on 2 sites but when I looked they were not on there and I had to notify them!!?? Then I had to drop the rent because of no tenant and they found a tenant and I asked for confirmation when the lease was signed but no response. Communication quite frightening. I just don’t feel at ease. Whilst their management fees are low I am wondering if it is worth it ?
Thanks again