Rochestown House

Rochestown House

Rochestown House stands as one of Ireland’s pioneering Passivhaus social housing developments, an exemplar of how deep retrofit and new-build extensions can deliver lasting social and environmental value. Acting as Passivhaus consultants, Mosart supported the project team in achieving certified energy performance across all dwellings, combining advanced insulation, airtightness, and mechanical ventilation strategies to ensure superior comfort and minimal running costs.

Location
Sallynoggin, Dún Laoghaire, Co. Dublin, Ireland
Role
Passivhaus Consultant
Year
2016
CertifiedPassivhaus standard
2016one of Ireland’s earliest PH social housing retrofits
Passivhaus Consultantour role
Overview

Rochestown House stands as one of Ireland’s pioneering Passivhaus social housing developments, an exemplar of how deep retrofit and new-build extensions can deliver lasting social and environmental value. Acting as Passivhaus consultants, Mosart supported the project team in achieving certified energy performance across all dwellings, combining advanced insulation, airtightness, and mechanical ventilation strategies to ensure superior comfort and minimal running costs.

This scheme demonstrates how Passive House principles can be applied sensitively within existing communities, preserving architectural character while achieving dramatic reductions in energy demand.

The result is a model for sustainable public housing: healthy, low-carbon, and cost-effective to run, showcasing the potential of retrofit-led regeneration in Ireland’s social housing sector.

Performance

Built to a standard you can measure.

≤15kWh/m²aspace-heating demand, the certified limit
0.6ACHairtightness at 50Pa, tested on site
Passivhaus Consultantour role on this project

Certification is independent: the model is verified and the airtightness is measured before handover. What that is worth to a scheme

Rochestown House
Rochestown House
Rochestown House

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