What type of house will I live at if I was born in Germany?

As elsewhere, depends if your parents are rich or poor, or if you live a city or the country etc.

 For a start: 'What type of house will I live in if.....?' 'In', not 'at'.

It would depend on which part of Germany you were born in, but in general a nice house with several bedrooms if your family is fairly rich. In the middle of cities everyone lives in apartments.

Depends on the area and the house that your parents have but normally, it would be a normal house.

This doesn't depend on being born in Germany.   As with anywhere, your accommodation would depend on your finances = your job!!   The style of house would depend on what region in Germany.

Your house is not defined by your place of birth.

whatever type of house you want to live in

It depends on where you live. There are many modern apartment buildings, and many houses 100 years or more old in some towns. I have a friend who lived in a very modern house. The living room has a glass ceiling that retract to make it open air in good weather. 

A gingerbread house.