Here are the thresholds for gifts:
GroupRelationship to DisponerGroup Threshold
2004(after indexation)2005(after indexation)2006(after indexation)
ASon/Daughter €456,438 €466,725 €478,155
BParent*/Brother/Sister/ Niece/Nephew/Grandchild €45,644 €46,673 €47,815
CRelationship other than Group A or B €22,822 €23,336 €23,908
The exemption on parent to child of a site transfer is as follows:
'The transfer of a site from a parent to child is exempt from stamp duty where the site transfer is for the purpose of constructing a house which will be the child’s main residence and where the value of the site does not exceed €254,000.'
The rates of stamp duty on non-residential property otherwise are:
Aggregate
ConsiderationRate of Duty
Up to €10,000Exempt€10,001 to €20,000 1%
€20,001 to €30,0002%
€30,001 to €40,0003%
€40,001 to €70,0004%
€70,001 to €80,0005%
€80,001 to €100,0006%
€100,001 to €120,0007%
€120,001 to€150,0008%
Over €150,0009%
You can see why it would be easier if you posted an estimate of value to give you a rough idea of the taxes etc.
In relation to the mortgage, there are far better qualified people who browse here who would be able to answer but I think the way it works is that your parents gift a site to you worth for eg 100K, and you obtain planning on it ( although it would be better if you got the planning before the transfer but thats another issue), and you get a quote of 150k to build your house. Well if the bank valuer concurs that the site is indeed worth 100k and that the completed house will be worth 250k, then you are only really looking for a 60% mortgage- of 150K. Does that make sense? In other words, depending on the value of the site you might well be able to obtain 100% of the building cost, although it would not be considered a 100% mortgage because of the equity you have in the site. Now of course obtaining 150k will depend on whether your incomes qualify you for this amount.HTH