Jarleth Heneghan


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Jarleth is a Partner in William Fry's Projects & Construction and Alternative Dispute Resolution. His practice is a mix of both contentious and non-contentious construction, projects and dispute resolution for State, international clients/intermediaries, developer, financial institutions, professional and contractor clients.

Jarleth advises on Irish and international construction and engineering bespoke and standard form agreements (e.g. RIAI, IEI, GCCC, JCT, NEC and FIDIC etc). He also advises on procurement and PPP/PFI. He also advises on alternative dispute resolution matters, including conciliation, mediation, adjudication, arbitration construction insolvency issues and rescue financing.

His experience includes advising:

  • the Governor and Company of the Bank of Ireland in connection with its financing of  the  commercial element of Central Park a highly sought after portfolio acquired by a joint venture between Green REIT and PIMCO.
  • the negotiation of a new facility to each of Joe O’Reilly and John Fitzsimons secured against 46 properties at Dundrum Shopping Centre, Dublin and known as the “Lenridge Properties”, together with the negotiation of an extensive security package in favour of NAMA. 
  • various complex projects across the DAA’s portfolio.
  • the Dublin Waste to Energy PPP Project – the largest PPP Project in the State.
  • Chartered Land on the project due diligence relating to Project Tara, asset sale of commercial property portfolio comprising economic office investment including buildings occupied by Facebook’s EMEA headquarters.
  • New Children’s Hospital of Ireland Project on the New Children’s Hospital.  This is the largest capital spend project in the Irish public healthcare sector with an estimated value of €650m and arguably the most high profile project in Ireland.

Jarleth is also a chartered surveyor with significant experience acquired in asset property management having worked with top tier firms in the United Kingdom. His qualifications include: Fellow of RICS and SCSI, Fellow of CIArb and practising arbitrator: panel arbitrator Ireland, England and Dubai, Chartered member of CIOB, CEDR qualified mediator and Solicitor, Law Society of Ireland and England and Wales - including higher rights of audience

Jarleth was listed in Best Lawyers 2019 under 'The Best Lawyers in Ireland' for work in Construction Law.

Described by clients as "attentive and knowledgeable," Jarleth  is known for his work on both advisory and contentious construction cases. He maintains a particular specialism in liability quantum and time disputes. Chambers Europe 2018

The "meticulous" Jarleth Heneghan provides "very practical advice on the public procurement process". Legal 500 EMEA 2018 

In Chambers Europe 2017, Jarleth is described as having a broad practice covering construction advisory matters and dispute resolution. He has particular expertise in liability, quantum and time disputes. One client lauds his "hands-on and solution-focused" approach. In Legal 500 EMEA 2017, Jarleth is described as ‘professional and personable’ and ‘excellent’. 

Jarleth is described as "proactive and efficient" by Legal 500 EMEA, 2015 while Chambers Europe 2015 find Jarleth to be "highly efficient, because he has been trained in the construction industry, so he understands it really well. He is not only clear on the big picture, but also on the nuts and bolts of construction. It is great to deal with someone who understands the process."

In Chambers & Partners 2014, it is reported that clients say, Jarleth "provides an efficient and thorough service" on construction projects. 


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Leading IndividualIFLR1000 (2018) Highly regarded

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