In Templeogue, Dermot revamps a 1970s suburban house for Rosie and firefighter Keith with a radical geometric extension.

A teacher plans to move into her grandparents' old 19th-century farmhouse in Co Meath before her wedding. Dermot Bannon discovers the property is outdated, cold and cramped, and begins making plans for a single storey extension. However, costs soon escalate as major problems are discovered with the drains and septic tank.

Architect Dermot Bannon takes on more design projects. At Sutton in Dublin, Dermot extends a beloved childhood home into a sumptuous new one for Hannah, James and their sons.

Dermot Bannon helps two teachers to renovate a cottage in Moate, Co Westmeath. Ther property is hemmed in on all sides, but the owners hope to come up with a design that gives them their privacy. The building contractor suggests it may be simpler to tear it down and start from scratch, and Dermot is soon proposing some unusual designs that have never been seen in the village before.

At the seaside village of Rush, Dermot does his best to keep up with sprout farmer Enda and his extraordinary self-build project.

In North Dublin Dermot doubles the size of a 1940's Malahide cottage to create the dream home Robbie and Julie have spent 20 years saving for.