Jerome O’Sullivan


Construction & Professional Negligence

Jerome is a Partner in the Construction and Professional Negligence Department has advised upon and conducted a range of professional negligence disputes involving solicitors, valuers, construction, finance and insurance professionals.


Jerome was successful at trial and in the Court of Appeal in the ground-breaking case of Dreamvar (UK) Limited v (1) Mishcon de Reya (2) Mary Monson Solicitors, which involved an ID fraud in a property transaction. Dreamvar clarified solicitors’ potential liabilities for breaches of trust, undertaking and warranty of authority, to both the vendor and the purchaser.


Jerome also advises on a wide range of construction disputes including defects, delays, extensions of time, loss and expenses, disruption, final accounts and retentions, suspension of works and nuisance claims.


Jerome’s client succeeded at trial in the Technology and Construction Court in the case of Freeborn v De Almeida Marcal (t/a Dan Marcal Architects) [2019] EWHC 454 (TCC), which was a case of wide-spread significance to those who commission construction professionals.


He has extensive experience of high-value insurance disputes including property, business interruption, employers’ and public liability, contractors’ all risks, new building warranties and pollution liability.


Jerome represents his clients in the various divisions of the High Court including the Business & Property, Commercial and Technology & Construction Courts, together with the Court of Appeal. He also advises in relation to mediation, arbitration and adjudication.


He is a Fellow of the Chartered Insurance Institute and a Member of the Chartered Institute of Arbitrators.

Legal 500 Recommendations

Jerome O’Sullivan is a ‘tenacious and a strong negotiator’. – Legal 500 2017

The ‘brilliant’ Jerome O’Sullivan is the leading advisor for the claimant in a £1.1m dispute against two firms of solicitors in relation to a fraudulent property transaction” – Legal 500 2018

Reported cases

Dreamvar UK Ltd v Mishcon de Reya & Mary Monson Solicitors [2016] EWHC 3316 Ch

P&P Property Limited v Owen White & Catlin LLP and Dreamvar (UK) Limited v Mishcon de Reya & Mary Monson Solicitors [2018] EWCA Civ. 1082

Freeborn & Anor v Marcal [2017] EWHC 3046 (TCC)

Freeborn v De Almeida Marcal (t/a Dan Marcal Architects) [2019] EWHC 454 (TCC),

Contact - [email protected]