Real Estate / Cost to build in Eastern Poland - Ideally per m2 [71]

Hi, I live in Scotland and am moving near Siedlce with my Polish wife and we are doing the same thing as you. Hopefully start building this year. We have budgeted about 350K (zl). Are you sure its 400m2? Thats like a factory size. If you stick dobry dom into google and type in the name of our house (dom w kamasjach) you will get an idea. Our house is about 180m2 and that is a 4 bedroom pad. Where is the town, if you dont mind me being nosey?

John