Removal of Magnolia Growing Next to C17th House - advice needed

[africanarborist]

Morning all, someone in the UK has asked me about a magnolia growing right next to their house wall. It's a late 17th century, stone rubble building located in the Melksham area. The tree is approx 3.5m tall with a trunk circumference of 50cm.  They want to remove the tree completely.  The location is sighted as an area of subsidence risk - this would be my main concern, but I am not familiar with root swell on magnolias + these old houses have shallow, direct load foundations (effectively a trench filled with stone).  I know it's not a big tree, but any advise would be welcome.  

Please see photos for reference. 

IMG_1016.HEIC IMG_1017.HEIC IMG_1018.HEIC

Edited January 18 by africanarborist
spelling mistake