During much of the 19th and 20th centuries, criminal court hearings took place at the old County Hall in Chester Street in Mold which was completed in 1834.

[5][a] The new Law Courts building was designed by the county architect, Robert Harvey, in the Modernist style,[7] built in blue brick with Portland stone banding, and was completed in October 1969.

[8][9][10] The design involved a symmetrical main frontage of eleven bays facing onto Raikes Lane.

The central section of five bays featured a glass doorway flanked by brickwork on either side, with sheet glazing on the two floors above.

[13][14] They also included the trial and conviction of the owner of three children's residential homes, John Allen, in November 2014, for charges in connection with the North Wales child abuse scandal.