Jarleth Heneghan


+353 1 639 5252
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Jarleth is a Partner in William Fry's Projects & Construction and Alternative Dispute Resolution departments. 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 Developer on the development financing and construction of the Bolands Quay office and residential development and its forward sole to Google Ireland Limited.
  • daa on the procurement and development of the Dublin Airport Central office park and infrastructure at Dublin Airport, various complex projects across the DAA’s portfolio.
  • Circle K on all aspects of the acquisition, financing, development and operation of several service centres throughout Ireland.
  • Hammerson plc on the development of private rental sector residential apartments of Dundrum Town Centre.
  • Digital Realty Trust on the development of their new data centre at Profile Park, Dublin and refurbishment of existing date centres across their portfolio.
  • Irish Life on the development financing and contribution of two major office developments at George Quay and at 70 St Stephen's Green Dublin.

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: CEDR Panel member, Chartered member of CIOB, CEDR qualified mediator and Solicitor, Law Society of Ireland and England and Wales - including higher rights of audience.

"His extensive practical and commercial knowledge is invaluable," a client says, adding that "he is responsive and clear in his advice." Chambers Europe 2021 

"Jarleth Heneghan and Cassandra Byrne have a great dynamic within the team which allows for open discussions on alternative solutions to issues. Clarity and response time are excellent." Legal 500 EMEA 2021

According to one client, Jarleth has a "great technical knowledge and excellent tracking of issues requiring close-out. The pairing of Jarleth Heneghan and Cassandra Byrne makes them a real pleasure to work with," adding that they are "clear, concise and straight to the point." Legal 500 2020

"His attention to detail, responsiveness and ability to change strategy due to the issues thrown at us was remarkable. He doesn’t quit or take the easy route, but he continues to fight for what’s right for the client" quotes another source in Legal 500 2020, adding his "depth of knowledge, commercial outlook and ability to look round corners have been invaluable to us over the years and will continue to be so into to the future," "his level of service delivery is top class."

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’. 


Legal 500 Hall of Fame

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