From: Rabbi Moshe Sofer
To: Eisenstadt
A neighbor sought to use his bar metzra preemption right to evict an insolvent homeowner whose property had been awarded to his son-in-law creditor, who chose not to foreclose. The Chasam Sofer emphatically affirms the local beis din's ruling against the neighbor, presenting six independent arguments why bar metzra does not apply: the sale was to a family member (son-in-law), the property was in effect returning to the original owner, there would be loss to the seller, the property was pledged, the purchase was below market value, and Rabbeinu Tam's view that bar metzra does not apply to houses at all provides further support. He condemns the neighbor's conduct as biblically prohibited encroachment and urges communal coercive measures until he desists.
Source: Shu"t Chasam Sofer CM §11