New Castle Lachlan, is an 18th-century baronial mansion or country house located at Strathlachlan, Cowal peninsula, Argyll and Bute, Scotland. It was built in 1790 by Donald Maclachlan, 19th laird, to replace the 15th century Old Castle Lachlan, which stands nearby on the shores of Loch Fyne. The building is protected as a category C listed building. The building was remodelled around 1910 by the architect George Mackie Watson. See also Old Castle Lachlan References External links Castle Lachlan Estate Houses completed in 1790 Castles in Argyll and Bute Category C listed buildings in Argyll and Bute Country houses in Argyll and Bute Listed houses in Scotland Cowal