In contemporary publications he was referred to as William Batt junior.
[3] Batt worked in the High Victorian architectural style throughout his entire career.
He began with numerous villas in the Malone Road.
In 1876–79 he designed the front gate lodge for the Botanic Gardens in Belfast which was demolished in 1965.
[4] He became a member of the Royal Institute of the Architects of Ireland in 1878.