Originally Posted by RV7ForMe
[...] I do no think EAA chapters are available. [...]
The EAA's website lists two chapters in Germany, one in Wilhelmshaven and another one in Munich:
I however couldn't find any information on the one in Wilhelmshaven and only an apparently abandoned website for the chapter in Munich.
The best starting point for home built aircraft in Germany is the 'Oscar Ursinus Vereinigung'. I believe that they are also involved in the certification process of home built aircraft and that the LBA relies on their judgement: http://www.ouv.de/fly/
I saw in your profile that you are still a student - if funds are a concern, a RV-9 might also be a great option, as it is one of the more modern kits with pre-punched holes, but which can also be combined with a smaller engine and a fixed pitch prop. A friend of ours has built one from a standard kit in 3 years and couldn't be happier with it.