Councillors could undermine local and national housing targets if they fail to rezone a site in west Dublin earmarked as “high amenity”, builder Michael O’Flynn warns in a letter to local representatives.

His company, O’Flynn Capital Partners, plans to build more than 500 homes at St Edmundsbury, Lucan, Co Dublin, in a joint venture with racing and investment magnates, John Magnier and JP McManus, who own the site.

South Dublin county councillors must vote on a proposal to rezone the land at a meeting on June 19th next, a move that would allow homes to be built on a site close to Dublin city and public transport routes.

O’Flynn has urged the 40 council members to vote for the proposed variation to the county development plan that would rezone the site and has warned that delays would have long-term consequences.

In a letter seen by The Irish Times, the builder argues that omitting the St Edmundsbury lands, close to the Hermitage Golf Club on the south bank of the river Liffey, would have implications beyond the site itself.