Beech tree near house

[Noizeboy]

Hi all. New here and hoping for some good honest advice.

looking at buying a beautiful house next to a whopping great (& beautiful) copper beech tree. Tree is roughly 20m tall, 1m diameter, and 1.5m from a lean to garage on the side of the house. House is 1930’s. 
I think the tree predates the house. In a recent neighbours report(it’s on the boundary line), the tree is in good health.

Does a mature beech tree change its root structure much over time?

RICS survey found no structural issues.

Am I right in thinking that if in the future the tree had to go (for whatever reason), this is not great as the tree predates the house? 
ground is charmouth mudstone.

Am I mad for even considering it?

Any advice appreciated.

[Domino]

The main thing to know and take into account here is - if the Beech is as old as you say (looks to be more or less correct) then its' possibly over mature and therefore you will likely pay for it to be removed at some point.  This will be costly and should be discussed when considering your offer.  In line with this,  it would be advisable to get a suitably qualified consultant to complete a survey so you have a good idea of general condition, potential hazards and life span. 

Hope that helps. 

[Steven P]

More photos: Depends when the camera car went past you might be able to get them off a streetview website