An immediate full review has been requested around the construction of a bike shelter installed at Leinster House which cost €336,000.
In a statement, the OPW said the project "was procured via a framework agreement and complies with public procurement and planning guidelines".
It cost €336,000 inclusive of VAT.
The Taoiseach has said that people do not get the "extraordinary sum of money" the bike shelter has cost, and he does not either.
Simon Harris said it was "inexcusable and inexplicable".
He welcomed the review that had been ordered by Minister with Responsibility for the Office of Public Works Kieran O'Donnell and said that he awaited that report.
Mr Harris said it was the type of thing that angered people and it angered him as well.
Yesterday, Minister for Transport Eamon Ryan said the OPW had questions to answer around the project.
Mr Ryan said the cost of the shelter - which can store 36 bikes - seemed to be "incredibly expensive".
The OPW has said that it "recognises the importance of ensuring that public money is spent transparently".
It added that given it was located within the setting of Leinster House, the construction "involved several unique challenges".
The structure consists of a steel framed, glazed canopy to ensure long term durability, it said, adding that the materials used were "carefully selected not only for their durability, but also for their compatibility with the historic setting of our national parliament".
The materials used included Irish granite, glass and steel.
Works commenced on the project in early January this year, after the contractor was appointed the previous month.
Final works were completed by mid-April.
The shelter, previously hailed by Mr Ryan as a good example of public sector climate action, required archaeological advice to make sure it fit in at the parliamentary complex.
A breakdown of costs from the OPW showed that €322,282 was spent on the main construction and installation project.
A further €2,952 was spent on archaeological services while €10,816 was paid for quantity surveying services and "contract administration services".
