We combine contemporary insight with highly developed conservation skills to create sustainable projects that fully integrate old buildings with new architecture. Our approach is thoughtful, our way of building applicable in any culture and society, with award-winning buildings both in Ireland and internationally. Valerie Mulvin and Niall McCullough founded McCullough Mulvin Architects in 1986, joined by fellow directors Ruth O'Herlihy in 2006, and Corán O’Connor in 2017.

Tragically, Niall McCullough died in August 2021 after a short illness. We are now working to honour all of the core principles founded early in the practice, continuing the established ethos in work across many sectors, with a particular focus on place-making, context and innovative conservation. Together with other long-term collaborators, we work at a range of scales, including cultural buildings, housing projects, hotels, office buildings, libraries, healthcare, schools and university buildings.

The practice is highly collaborative and open in its dialogues; our clients form part of the team, with the end result reflecting that dynamic exchange. We extend our practice through research, writing, films and exhibitions, exploring the themes that inform our work.