@PhilIpZ20201 Well Philip.I hope it turned out alright in the end for you,you were a very brave person,it nearly killed us,my husband had the land and we built a 3 floor house,well the bottom was an apotheki supposedly,we put a bathroom,the mechanic OKd it but when we came to sell all hell was let loose because a new mechanic took over when ours died at 42 halfway through building,a new license was made for another 3 thousand and she didnt add the bathroom,so the agent we used to sell was a mechanic as well and he knew people in high places who could somehow add the bathroom on to the second license which came at a cost but was legal in the end,me in my panic told him...oh just tell the buyer theres no bathroom downstairs,its too late he wants it for guests.He was a rich Russian person with a big Russian family visiting,loads of loos needed.One has to pay all the masteraas pension stamps even if you do the work yourself,you still pay,they gave us about 8 years to come up with the money,bit by bit we paid,the roof was done twice,it looked like a ten year old had done it,I was ready to move into a yurt forever after that,I still am.A horrible neighbor marked out on our veranda where she wanted part of it cut off,too close to my house she said and she went to the planning department to inspect our plans for illegalities and it wasnt until we told her that our mechanic had clearly seen irregularities on her house,illegal, that closed down her mouth never to be heard again for fear of penalties.The day we completed on that was like we had been let out of prison.so take heed readers,it can be done BUT research well,build only very very small,a semi basement is worth having but the special membrane for damp must go around before the soil is put back.never try to say..oh lets make this into part of the house,its not unless your license says so and it cant say so if you have used your metres upstairs and anyway they dont let you,its a storage room,you can have water and electric,thats all.We did sleep in the summer because its cool and soooo warm in the winter, so really I wish i had just built into the ground,just a semi basement with a fab garden and sunken veg garden,nothing more,and oh so much less maintenance,remember older age brings less desire for house jobs,repairs etc.. other wise one begins to curse the house thats seems to be taking your life.
