Dublin’s biggest public transport project has taken another major step forward, but the latest figures confirm that delivering it will cost considerably more—and take longer—than previously expected.
The Government has approved MetroLink to enter its detailed tender stage, allowing market bids to be sought for the construction and operation of the new railway.
The updated estimated cost now ranges from €14.44 billion to €17.49 billion, excluding VAT. The central estimate is €15.75 billion.
That compares with the broad 2022 estimate of approximately €7.16 billion to €12.25 billion. At the lower end, the projected price has therefore more than doubled in four years.
However, the final bill is not yet known. Firm prices will only become clearer after contractors submit their bids, with the next major government approval stage currently expected to begin in late 2027.
When will MetroLink open?
Passengers are now expected to begin using MetroLink sometime between 2036 and 2038, with 2037 treated as the central estimate.
The official programme allows for approximately eight to ten years of construction. Enabling works are expected to begin first, followed by the heavier tunnelling and station-building programme.
The revised timeline means Dublin will have to wait longer than earlier projections suggesting an opening in the early 2030s.
What will Dublin get for the money?
MetroLink is planned as a 19km, mostly underground railway running from Estuary, north of Swords, through Dublin Airport and the city centre to Charlemont.
Its 16 accessible stations will serve locations including Swords, Dublin Airport, Ballymun, Dublin City University, Glasnevin, the Mater and Rotunda hospitals, Tara Street and St Stephen’s Green.
Driverless 64-metre trains are expected to run every three minutes in each direction during peak periods when the line opens. The system is designed to carry up to 20,000 passengers per hour in each direction—more than twice the capacity of the existing Luas Green Line.
Interchanges with DART, Luas, heavy rail and bus services are intended to make MetroLink more than an airport shuttle. It is being designed as a new north–south spine for Dublin’s entire public transport network.
According to the Government-approved MetroLink business case, the project could directly support around 77,000 additional homes along its route and contribute to the delivery of up to 200,000 homes across the wider Greater Dublin Area.
Why has the estimate increased so sharply?
The official explanation points to several pressures rather than one single cause.
Construction inflation, increased contractor costs and a more cautious allowance for risk have all pushed the figures upwards. The design has also developed considerably since the earlier estimate, with changes involving platforms, tunnelling methods, escalators, fire-safety modelling and mechanical and electrical systems.
Additional costs have followed the planning process and agreements with bodies including Dublin Airport Authority, Dublin Fire Brigade and Iarnród Éireann. Around €500 million has also been allocated for worker accommodation and other commitments that were not included in the earlier baseline.
The project’s central estimate has risen from €9.5 billion at 2021 prices—or €10.7 billion when adjusted to 2025 prices—to €15.75 billion.
The official MetroLink Approval Gate 2 explainer says every €1 invested is expected to return between €1.13 and €1.78 in direct benefits. When wider economic effects are included, the projected return rises to between €1.26 and €1.95.
A game-changer—or another test of public confidence?
Transport Minister Darragh O’Brien has described MetroLink as a game-changer that would reduce congestion, improve airport access, support housing and strengthen Ireland’s economic competitiveness.
Those benefits are difficult to dismiss. Dublin remains one of the few European capitals without a rail connection to its main airport, while continued population and housing growth is placing additional pressure on roads, buses and existing rail services.
But a price approaching €17.5 billion will inevitably attract scrutiny. Dubliners have heard promises about an airport metro for decades, and the revised opening window means another ten years could pass before the first passenger boards a train.
The next phase must therefore be judged on delivery as much as ambition. Transparent procurement, tight cost controls and honest public updates will be essential if the Government wants to retain confidence throughout such a long construction programme.
MetroLink could transform how Dublin moves. The challenge now is proving that Ireland can deliver that transformation without allowing the cost or timetable to drift again.
What does MetroLink mean for Belfast passengers?
MetroLink will not provide a direct Belfast-to-Dublin Airport train, but its integration with Dublin’s wider rail network should make airport journeys easier for passengers arriving from Northern Ireland.
Also on Love Dublin: full MetroLink cost briefing.
Belfast–Dublin Enterprise services arrive at Connolly Station. MetroLink will connect with heavy rail and DART services at Tara Street and with rail services at the planned Glasnevin interchange, creating onward transfer options to Dublin Airport once the line opens.
Planned improvements to the railway corridor between Dublin and Drogheda should also benefit cross-border passengers independently of MetroLink. The real improvement will depend on coordinated timetables, simple ticketing and convenient transfers—details that will matter enormously to travellers carrying luggage.
Discover more from LoveBelfast
Subscribe to get the latest posts sent to your email.
