The Government is due to announce the details of a flagship plan to build infrastructure over the next five years which will include €40bn for housing, including water services.

The revised National Development Plan will contain €100bn funding for housing, energy, water and transport projects from 2026 to 2030.

Around €30bn of that figure is said to be new funding, some of that coming from the Apple tax money and the sale of AIB shares.

Transport will receive €24bn, with €2bn of this for Dublin's Metrolink. Meanwhile, €3.5bn is earmarked for electricity services and the grid going to ESB Networks and Eirgrid.

Housing delivery is the centrepiece of the plan, with increased funding to build homes and accompanying electricity and water connections.

Minister for Public Expenditure Jack Chambers said: "Between water, waste water and supports for the Department of Housing, that will be in and around €40bn of the €100bn we're announcing today."

The Cabinet will meet this morning to agree the framework for infrastructure investment.

With Departments set to be allocated funding for capital projects, Uisce Éireann is also set to benefit.

There will be a major increase in defence spending, with a focus on radar, sonar and force protection for Irish troops.

Govt to unveil headline allocations today, with project details coming later, reports Sandra Hurley

The Taoiseach Michéal Martin said the Government is "very committed" to Dublin's Metrolink and said the spiraling projected costs of the plan is a matter for the outcome of the tendering process.

"You can never be specific or precise about costs until the tenders come in. And we have some distance to go before that happens," Mr Martin said ahead of Cabinet.

In terms of the NDP, the Taoiseach said the Government is committed to projects "the length and breadth of the country, in every part of the country, particularly in terms of road infrastructure, in terms of public transport, in terms of housing and enabling infrastructure to facilitate housing".

Mr Martin told reporters that the investment being announced today "will be of a scale that is unprecedented, but I think we give security and certainty to basic infrastructural needs of any society, water and energy and transport".

Read more: Inside the Government's €100bn infrastructure plan

Tánaiste Simon Harris described the plan as a "moment of transformation" for Ireland.

"Today we will announce the headline figures for each department, the allocations that each department will have for the next number of years. Each minister will then work on their own investment priorities, and they'll be published on budgeting," Mr Harris said.

He added that investing in infrastructure like water and energy will ensure that the Government can "deliver the homes that are badly needed for young people in this country, and get back to a reliable supply of houses, but then also the social infrastructure that must go with it".