C+W O’Brien Architects is a technical and delivery-led architecture and advisory partner for complex developments.

We deliver process-led, technically strong architecture across residential, hospitality, and data centre sectors, supporting clients from early decision-making through to construction. Headquartered in Ireland, with offices in the UK and a growing presence across Europe and the Middle East, we combine local expertise with international experience—helping clients manage risk, achieve certainty, and deliver at scale.

Our work is defined by clarity, rigour, and a focus on what ultimately matters: projects that work, can be built, and stand up over time.

Why work with us

At C+W O'Brien we have a wealth of experience across a number of sectors including;

• Traditional Residential
• Apartments
• Build to Rent
• Student Housing
• Co-Living
• Hotel & Leisure
• Offices
• Health Care
• Industrial
• Education

We are also at the forefront of Industrialised Design and Construction in Ireland as a founding member of Modern Methods of Construction Ireland (MMC).