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Ireland's largest passive house development to date, Shanganagh Castle, is proof that with proper planning and collaboration, delivering high density housing doesn’t mean compromising on quality or climate action – without increasing costs or causing delays.

Designing a passive house is one thing. Designing a scheme of passive houses to make the most of the views on an extraordinary coastal site is another. And designing that scheme to tie into the local supply chains and architectural vernacular – while ensuring the homes are set up for changing, potentially disengaged occupants – is the stuff of magic.

The proof in the pudding with a notionally low energy building is in the eating. Since moving into their new passive house a little under two years ago, the Murray family’s heating costs have been scarcely believable – in a home that also blitzes the embodied carbon targets in the RIAI 2030 Climate Challenge.

What does it feel like to suffer the cold, mould and discomfort of a 1960s bungalow, and experience its rebirth as a passive house? The owner of one award-winning project spills the beans.

Additional reporting by Jeff Colley

While the passive house standard has had a lasting impact on the design and construction of new homes in Ireland, progress has been slower in commercial property. With the business world under increasing pressure to take meaningful climate action while providing better working conditions for staff, one new office building in the southeast may be a sign of things to come – and a beacon for a UN-affiliated project.

The skilful deep retrofit of a red-brick semi on the south side of Dublin has brought an old property into the 21st century in terms of energy performance and living space, while carefully upgrading its century-old façade with breathable materials.

Rural Ireland has a crisis of dereliction, with numerous government policies aimed at breathing new life into thousands of old, vacant buildings. The careful transformation of one 19th century schoolhouse into a small, beautiful home shows a way forward for the sensitive, climate-conscious renovation of many of these properties.

Complete with butterfly roofed extension, this fabric first renovation has turned a cold and uninspiring 1970s bungalow into a cosy A-rated modern home, with some clever design touches helping to open the house up to wide-angle views and dramatic coastal light.

The extensive energy and ventilation upgrade of 12 run-down bungalows at College View sheltered housing scheme in Wexford town not only transformed the lives and comfort of residents, but an extensive period of post-occupancy study has yielded important lessons for future projects.