3 Assembly Square is a landmark waterfront office development in the heart of Cardiff Waterside, offering 65,765 sq ft of high-quality office accommodation across the ground floor and five upper levels. Designed to provide an exceptional working environment, the building combines contemporary architecture, sustainability credentials, and excellent connectivity, making it one of Cardiff’s most desirable business addresses. The available space is located on the 4th floor.
At the heart of the property is a striking full-height glazed atrium that creates an impressive arrival experience and fills the reception area with natural light. The building has been developed to a high specification and has achieved a BREEAM Excellent rating alongside an EPC B rating, reflecting its strong environmental performance and commitment to sustainable operation.
Occupiers benefit from a comprehensive range of modern amenities, including raised access floors, chilled beam air conditioning, LED lighting, solar shading, shower facilities, secure bike storage, disabled access provisions, and 24-hour access with dedicated security and commissionaire services. The property also incorporates sustainability-focused features such as rainwater harvesting and a sustainable waste management plan. An undercroft car park provides 70 dedicated parking spaces, offering convenience for both staff and visitors.
Positioned directly behind the Senedd and overlooking Roath Basin, 3 Assembly Square enjoys a prestigious waterside setting within one of Cardiff’s most established business districts. The surrounding estate is home to a range of prominent occupiers including HBOS, Atradius, Ofcom, the European Commission, CBI, Arup, Graig, the Wales Office and Regus, creating a vibrant and professional business community.
Cardiff Waterside offers an extensive selection of amenities within easy walking distance, including banks, childcare facilities, dental services, hairdressers, retail outlets, a cinema, casino, bowling facilities, and a diverse range of restaurants and cafés catering to all tastes. The location provides an attractive work-life balance, combining a dynamic business environment with leisure and lifestyle amenities.
Connectivity is another key advantage. Cardiff Waterside benefits from excellent transport links, with convenient access to national road, rail, and air networks. Locally, frequent bus services, nearby train connections, and even boat-bus services provide efficient and stress-free commuting options, while also offering easy access to the Welsh coastline, countryside, and wider UK destinations. Together, these attributes make 3 Assembly Square an outstanding choice for organisations seeking high-quality office space in a prime Cardiff waterfront location.
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