New or old property to buy?

You will need to take the purchase taxes and sales taxes in to account as both with fees tend to be around 10% ish. Also an estate agent will charge around 5% generally. Then there is the plus valia, which is a tax on any increase in the properties value.

If still keen then in my opinion I would go for an existing property. Newer properties are built smaller and tend to be packed together.

Buy in a good location. Near the sea and with good views, in a well run community will protect the value somewhat if the market goes South.

All from my experience by the way, but you are right in doing as much research as you can.

Oh! And use a good lawyer, rather than a gestoria.

Thank you