fir: the foliage of firs typically leaves little room for a house. if there are severale tree close together they can be used for walkways or raised structures for school or sports.
maple: excellent, even for very large houses. the trunks often branch out just a few metres off the ground so that even quite heavy structures can be built in a single tree.
beech: a mature tree lends itself perfectly to the construction of a house. it is important to pay attention to the distribution of the branches of leaves as they can often shield away much of the available sunlight.
walnut: very sturdy and strong, often with branches forking out about one third up its height, providing an excellent base for a largish house.
pine: the trunk almost always branches out at the top, excellent for supporting structure at considerable heights.
plane tree: very sturdy and usually large enough to accomodate a fully-serviced, multy-storey house.