Compared to the UK, in particular, affordable land for "self build" is readily available in the Salzburgerland region. 
However due to the climate, build costs are high. 
Properties have to be built to withstand the extremes of weather.
 There is a good supply of skilled builders and project managers who can build on your behalf . 
An alternative is to consider "Kit" builds and we have good contacts who can manage this type of project.

New build means you do get an "energy efficient" property which in these times of rising fuel costs is well worth considering.