A major expansion of Cloverhill Prison is set to begin, following the signing of a construction contract for a new accommodation block at the west Dublin facility.
The project, awarded to JJ Rhatigan & Co., is expected to take 22 months to complete. Once finished, it will increase Cloverhill’s capacity from 433 places to more than 700, adding 267 spaces to an institution that has faced sustained pressure from overcrowding.
At the centre of the development will be a four-storey extension to Block D. The new building will contain 143 cells and will be designed to accommodate up to 270 prisoners. It represents the largest construction project undertaken by the Irish Prison Service in several years and forms a central part of the State’s wider programme to modernise and expand the prison estate.
The expansion is intended to provide safer, more suitable accommodation for people in custody while improving working conditions for prison staff. It is also expected to support rehabilitation services by creating a more modern environment in which education, healthcare and structured prison programmes can be delivered.
Cloverhill is one element of a broader capital plan that aims to provide more than 1,500 additional prison spaces between 2024 and 2031. The programme has been developed in response to rising prisoner numbers, overcrowding and the need to replace or extend ageing facilities.
Since 2024, some 265 spaces have been completed across the prison system. This includes 126 places delivered in 2024, 106 in 2025 and 33 during the first part of 2026. A further 32 spaces are due to be completed before the end of this year, followed by another 70 in 2027.
Other major projects planned under the programme include a substantial extension to Cork Prison on the site of the former prison, a new accommodation block at Wheatfield Prison and an additional block extension at the Midlands Prison. Further capacity is also being developed at Castlerea, Mountjoy, the Dóchas Centre and Limerick Male Prison.
The Government has allocated €67.9 million in capital funding to the Irish Prison Service for 2026. This forms part of a €528 million investment package covering the period from 2026 to 2030, with €495 million earmarked for prison construction and expansion projects.
The investment also reflects a shift toward long-term capacity planning, rather than relying solely on short-term measures to manage growing pressure throughout the prison system.
Planning work is also due to advance on a new prison at the Thornton site in north County Dublin. A master plan is expected to determine how the site will be shared by the Irish Prison Service, International Protection Accommodation Services and An Garda Síochána. Construction work at Thornton is currently planned to begin in 2030.
The Cloverhill contract marks a significant step in the prison building programme. With construction now moving forward, the project is expected to deliver badly needed capacity and help reshape the prison estate for the demands of the coming decade.
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