Hi Spider welcome to the forum.
We live in Central Portugal, near Tomar and are in the middle of building a house, costing around 500 sqm, it may cost more if your near a big city and a little less in the country. Building work in Central Portugal is quite cheap compared to the Algarve which is closer to 1000 euros sqm or in the uk which can be 1500 pounds!!!
What are you planning on building? rebuild? newbuild?
Do you know about planning here in Portugal and the time it can take?

Not sure about golf near Coimbra, we have a few courses near us but would be 2 hours from Coimbra

Regards
Derek
GekkoPortugal: A guide to Living, working and buying property in Central Portugal: Houses, Farms, Apartments, Cottages, Building Plots, Villas