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Dermot travels to the village of Puckaun in north Tipperary, to meet teachers Darragh Egan, his partner Sarah Lovett and their three month old son Donagh.
In Drogheda, Dermot attempts an architectural flight of fancy at the 1930s home of long-haul airline Pilot Ian and his girlfriend Claire.
Dermot travels to Baldoyle, North Dublin, where he flips the upstairs and downstairs of Mel and Aoife's bayside home to make the most of a spectacular view.
In Maynooth, Dermot redesigns George and Sinead's 1850s coach house only to discover the entire building has been compromised by a parasitic fungus.