The Challenge

The ESB Headquarters in Fitzwilliam Street Dublin occupy an entire city block that was originally redeveloped in the 1960s. A second redevelopment of these headquarters commenced in 2017 with two reinforced concrete office blocks of 48,000m2.

Roadstone acted as the main readymix concrete supplier to the project, with in excess of 30,000m3 of concrete being used for a variety of concrete elements including basement and suspended slabs, slipform towers, walls, columns, and stairs.

The Solution

Seven slipform towers to an approximate height of 35m form the core of Project Fitzwilliam. These towers were constructed between December 2018 and June 2019. Each tower took approximately one week to complete in one continuous lift with concrete supplied 24/7 for the duration of construction of each individual tower. Providing concrete slipform mixes that achieved the concrete contractors setting time requirements and the continuous supply of concrete over the period of a week posed a particular challenge rarely encountered when supplying readymix concrete.

Exposed concrete elements can be seen throughout Project Fitzwilliam. The underside of soffits, walls and columns, and stairs were all constructed with specialist concrete mixes to achieve a high-quality finish. These different concrete elements are structural in nature while also offering a sleek modern design for the ESBs redeveloped headquarters.

The Result

The ESB Headquarters in Fitzwilliam Street uses concrete as both a functional building material and for aesthetic purposes for this ground-breaking development.


This building has achieved the BREEAM Excellent certificate for its holistic approach to sustainability.

Concrete mix design details can be used for both BREEAM or LEED calculations with specific project mix design details available on request through our technical department.