Ireland offshore energy push to 37GW: design implications for engineers
Reviewed by Joe Ashwell

First reported on New Civil Engineer
30 Second Briefing
Government ambitions for Ireland’s coast target up to ~37GW of offshore renewable energy capacity by 2050, implying large-scale deployment of fixed and floating wind farms in the Irish Sea, Celtic Sea and Atlantic. Delivering this capacity will require rapid consenting, grid reinforcement and new 220–400kV subsea interconnectors, alongside major port upgrades for turbine marshalling and heavy-lift installation vessels. For civil and geotechnical engineers, the scale signals sustained demand for seabed investigations, foundation design for deep-water sites, and coastal infrastructure capable of handling XXL monopiles and floating platforms.
Technical Brief
- Scale of build-out will demand industrialised offshore ground investigation campaigns over several decades.
- Onshore landing points for subsea cables require robust coastal protection against Atlantic storm surge and erosion.
Our Take
Ireland’s 37 GW offshore potential by 2050 would, if even partially realised, require grid and interconnector upgrades on a scale comparable to the largest power-infrastructure schemes in our 830-piece Infrastructure corpus, signalling substantial opportunities for civil and marine contractors rather than just turbine OEMs.
For practitioners, a 2050 horizon in Ireland implies that early projects will need to be designed with phased expansion and repowering in mind, so foundations, cable corridors and onshore substations are likely to be sized or safeguarded for much higher future capacities than initial build-outs.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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