Architect could not be treated as an expert witness in wall dispute case

A semi-retired architect who provided testimony in a legal dispute involving Dublin’s former county registrar has been accused of misrepresenting his qualifications, an act described in court as potentially criminal. The court ultimately ruled that the architect could not be treated as an expert witness in the case.

The ruling has raised concerns among construction and legal professionals, highlighting the stringent standards required for expert witnesses in court proceedings.

Case background

The dispute which was between two neighbours, centred on damage to a shared garden during building work by one neighbour (the defendant). The other neighbour (the plaintiff) alleged the replacement wall was improperly built with foundations encroaching on her property. The defendants argued that the replacement wall had been agreed upon with the plaintiff’s architect’s involvement.
The case, which spanned nine days in the Circuit Court, concluded with a judgment issued in late 2024.

Credentials under scrutiny

The architect, engaged by the plaintiff and her husband who is a solicitor, claimed during testimony that he was a registered architect with the Royal Institute of Architects of Ireland (RIAI) until 2017. However, during cross-examination, the defendants’ legal team presented correspondence from the RIAI confirming that the architect had not been registered since the organisation’s inception in November 2009.
The defendants’ legal submission argued that architect’s false claims and “untruthful evidence” disqualified him from being considered an expert witness. They further contended that the architect’s testimony should be entirely disregarded and accused him of acting as an advocate for defendant’s “imperious demands.”

Court’s findings and broader implications

Judge Jennifer O’Brien ruled that the architect’s evidence could not be accepted as expert testimony. This left the plaintiff without an expert witness to support her claims, leading to the dismissal of her case against the defendant.

The ruling has prompted renewed attention on the qualifications and credibility required of expert witnesses in legal disputes. Construction and legal experts have emphasised the importance of professional integrity and transparency, warning that misrepresentation of credentials in court can have serious legal and reputational consequences.

Find out more about our expert witness training programme here

Have you already attended the expert witness training programme but would welcome a refresher course?

If so, the Advanced Workshop for Expert Witnesses is for you.