Roberts also built the Assembly Rooms on Waterford's Mall in 1788, which is now the Theatre Royal and City Hall.

They lived for many years in the old bishop's palace, opposite the cathedral, with a country residence at Roberts Mount.

[7] He was nicknamed "Honest John" because he paid his workers so reliably, sometimes giving half their pay directly to their wives so that it would not be wasted on alcohol.

[8] John Roberts died in 1796 after falling asleep on the floor of the Cathedral of the Most Holy Trinity, Waterford and contracting pneumonia.

[8] Roberts' sons Thomas and Sautelle became artists, as did his daughter, who painted scenery for the Waterford Theatre and landscapes.