About Castlethorn

Aerial photo of Lansdowne Place apartment development

Our Passion

Creating Great Places for Everyone

Castlethorn is one of Ireland’s foremost real estate developers and home builders. For over 35 years, we have led the way in creating superior, innovative and sustainable developments.

Our passion goes beyond building property. We are committed to design excellence, progressive urban planning and the delivery of the highest quality built environments. Placemaking is our main ambition, and it’s our greatest achievement.

By combining unrivalled vision, expertise and creativity, our team turns ambitious plans into thriving places to live, work and socialise.

Our Performance

Successfully Delivering Since 1989

Over 15,000 homes built –
housing up to 45,000 people
3 million sq ft
of commercial space developed and 9,000 jobs created –
supporting a stronger economy
50km of roads and
6 pumping stations –
connecting communities to essential services
8 school sites
3 community centres and
20 playgrounds delivered –
helping communities to flourish
Photo of houses and green area in Brighton Wood development

Our Approach

Guaranteeing Quality

Attention to detail informs everything we do. Starting with meticulous site selection, we make sure that all our developments are ideally positioned, with all the amenities and infrastructure they need to grow into truly great places.

Once we have the right location, our team follows up with award-winning design, using energy efficient specifications, exceptional craftsmanship and detailed finishes. Finally, we complete our schemes with carefully considered and complementary landscaping.

Our Promise

Building Trust

Our customers know that the Castlethorn name is one they can trust. We take the time to really understand their needs, and we are there for them long after completion to ensure they get the most from their investment. With more than three decades of experience in the Irish market, we are proud to stand over every project we have delivered.

Photo of Bord Gais Theatre in Grand Canal development
Children playing in green fields

Social Responsibility

Supporting Communities

It is people who build community spirit, and we are very happy to support the work of these important organisations.

Laura Lynn Logo
Lighthouse Charity Logo
Barretstown Logo
MS Ireland Logo
Cystic Fibrosis Ireland Logo
Early Learning Initiative Logo

Sectoral Engagement

Contributing to Our Industry

We actively participate in the development of our sector through our membership of the Construction Industry Federation (CIF), the Irish Home Builders Association (IHBA) and the Society of Chartered Surveyors Ireland (SCSI).

Our ongoing engagement with consultative bodies, and local and national government, also gives us a platform to drive improvements in the standards and business conditions that shape our industry.

CIF logo
IHBA logo
SCSI Logo
Photo of office building in Grand Canal development

Our Experts

Meet the Team

Joe O’Reilly

Joe O’Reilly

Founder and CEO

Joe has been involved in property development in Ireland for the last 30 years and is one of Ireland's most prolific developers.

Ronan Columb

Ronan Columb

Group Managing Director

Ronan Columb joined Castlethorn in 2004 as Construction Manager and was appointed Construction Director in 2007 where he was responsible for all Construction and Quantity Surveying activities in the company.

Andrew McBennett

Andrew McBennett

Director

Andrew joined Castlethorn as a Senior Executive in 2018. A qualified Chartered Surveyor specialising in planning and development, Andrew has over 12 years experience in the real estate industry.

Eoin Wilcox

Eoin Wilcox

New Projects Director

Eoin joined Castlethorn in 2008 as Construction Manager. His role evolved into that of Development Analyst and he was appointed as New Projects Director in 2014.

Fergal McDonough

Fergal McDonough

Group Finance Director

Fergal McDonough joined Castlethorn as Financial Controller in 2004 and was appointed Finance Director in 2015 and Group Finance Director in 2019.

Olivia Leahy

Olivia Leahy

Associate Director

Olivia joined Castlethorn in 2018 as Executive Assistant. Olivia was appointed as Associate Director and to the Executive Team in 2023.

Ben Brady

Ben Brady

Senior Residential Sales & Marketing Manager

Ben Brady joined Castlethorn in 1995. Ben has extensive experience in the New Homes sector and has overseen the sales, marketing and completion of over 8000 residential units in some of Dublin’s iconic developments.

Gemma Harrington

Gemma Harrington

Residential Sales & Marketing Manager

Gemma Harrington joined Castlethorn in 2018 as Residential Sales Manager. Her primary role is to oversee the sales in Lansdowne Place. Gemma has over 15 years in the property industry.

James Leonard

James Leonard

Senior Project Manager, Planning

James joined Castlethorn in 2006 as a Project Manager in our Planning Department. James has over 20 years experience in town planning.