The land owner is selling of plots of 14 in total, of land wich he had gotten permission to sell as indvidual building plots.
I recommend going to the town hall to find out what exactly you can build, how many floors, how many metres square, sometimes even angle of roof is important.
If they don't have a general plan, it is different.
Perhaps the seller could provide you with this information but you are better off going to the source for accuracy.
There is a well, and there are at least 20 houses near by so i didn't think that electric connection would be a problem.
I am not trying to worry you but often towns and cities in Poland are not equipt to supply more houses.
Have you build in poland?
how long will it take to get planning permission, and services connected
It has just been made more efficiant to get construction permission.
It really depends on the town hall and how efficient they are.
Service connections all depends on where you have to connect from.
I am not trying to be evasive, there are some general rules but I recommend finding out this information first.