Lehn had inherited circa 200,000
Danish rigsdaler from his father. He purchased
Højbygård at auction in 1725, followed by
Fuglsang and Priorskov in 1726 and finally
Berritsgård in 1729. He took active part in the management of his estates. He had a reputation for being a fair and humane landlord. Lehn and his brother Johan Lehn (1705-1760) were ennobled by
letters patent in 1731. He was also the owner of several properties in Copenhagen. He inherited the
Lehn House on
Strandgade in
Christianshavn from his father. He purchased
Kanslergården in
Store Kannikestræde but it was destroyed in the
Copenhagen Fire of 1728. He did not rebuild it but instead sold the site. ==Collector==