Hi Voodoo,
Some banks will give you a loan for a site only if has planning permission already on it? Are you buying subject to PP or does it have outline planning? With regard to building you say that it will cost about E175,000 to E200,000 - is this builders finish or or turn key price? If it is the first option don't forget to factor in your kitchen, floors, tiles, painting, and landscaping, fencing - it can add up - so before you jump in make sure you've accounted for everything - there is a thread about prices for building.