Department profile
4 New Square Chambers

Construction: Professional Negligence

UK Bar Guide 2026 : All Circuits


4 New Square Chambers

Rankings

Chambers Review

Provided by Chambers

Construction: Professional Negligence - All Circuits

Band 2

Band 2


What the Team is Known For

4 New Square fields a wide array of professional negligence expertise to both claimants and defendants in claims stemming from the construction industry. Its members are much in demand for matters concerning architects and engineers, but also other technical professions such as designers of software or IT infrastructure. The set frequently acts in relation to high-value, complex and sensitive matters, including a number of post-Grenfell cladding-related claims. Recently, members have appeared in Avantage and others v GB Buildings and others. A source notes it has an "excellent choice of first-rate barristers with a broad range of experience in claims against construction professionals."

Lizzy Stewart is the senior clerk.

Strengths

Provided by Chambers

  • The clerking is efficient.

    Construction: Professional Negligence respondentUK Bar
  • Its clerks are professional, helpful and quick to respond.

    Construction: Professional Negligence respondentUK Bar
  • The clerking team is good. It is a really well-oiled machine.

    Construction: Professional Negligence respondentUK Bar
  • They are the best clerks I deal with. They go the extra mile to find someone suitable with availability.

    Construction: Professional Negligence respondentUK Bar
  • The 4 New Square clerks are always available and responsive, and are always able to find the right counsel for the case.

    Construction: Professional Negligence respondentUK Bar

Notable Practitioners

Provided by Chambers

  • Band 1Ben Patten
    Band 1Ben Patten

    Ben Patten

    Ben Patten KC runs an impressive and wide-ranging professional negligence practice focusing in particular on claims arising in the construction and technology sectors. He acts for both claimants and defendants in negligence actions involving engineers, contractors, architects and other professionals, and is a recognised contributor to the body of writing on professional negligence.

    • He's a standout professional negligence barrister.

      Construction: Professional Negligence respondentUK Bar
    • He's one of the best around. He has the great combination of responsiveness, friendliness and legal analysis. I literally can't find a fault in him.

      Construction: Professional Negligence respondentUK Bar
    • Ben Patten gives clear advice and appreciates the commercial reality of the situation.

      Construction: Professional Negligence respondentUK Bar
    • He is strong on professional negligence construction cases and extremely experienced in those contexts. He has a great natural authority.

      Construction: Professional Negligence respondentUK Bar
  • Band 1Roger Stewart
    Band 1Roger Stewart

    Roger Stewart

    Roger Stewart KC is a well-regarded construction specialist who acts for claimants and defendants in complex professional negligence disputes. He is also well versed in related insurance claims and in international arbitration. He has experience of acting in appellate matters, including before the Supreme Court.

    • Roger handles large cases with ease and does amazingly well with his cross-examination.

      Construction: Professional Negligence respondentUK Bar
    • He is super-experienced. Roger is right up there with the top people we would go to.

      Construction: Professional Negligence respondentUK Bar
  • Band 1Siân Mirchandani
    Band 1Siân Mirchandani

    Siân Mirchandani

    Siân Mirchandani KC is experienced in a variety of construction-related negligence areas, representing civil engineers, developers and architects, as well as software engineers. She represents both claimants and defendants, and is often involved in disputes involving highly technical elements.

    • She is ferociously analytical in court, with a calm and straightforward communication style. She has fantastic people skills.

      Construction: Professional Negligence respondentUK Bar
    • Siân is very impressive.

      Construction: Professional Negligence respondentUK Bar
  • Band 2Tim Chelmick
    Band 2Tim Chelmick

    Tim Chelmick

    Tim Chelmick is a highly regarded professional negligence barrister who represents architects and engineers as well as claimant employers, main contractors and others. His background in chemistry and IT enables him to excel in particularly technical cases.

    • Tim Chelmick is a helpful and user-friendly barrister who is very good with clients and can get to grips with the technical subject matter of construction and engineering disputes.

      Construction: Professional Negligence respondentUK Bar
  • Band 2Tom Asquith
    Band 2Tom Asquith

    Tom Asquith

    Tom Asquith has strong experience of appearing in TCC disputes, representing contractors, architects and surveyors. His expertise includes cladding and fire safety issues.

    • Tom is able to jump to the crux of a matter and he also has a nice personal balance and is able to work well in a big team.

      Construction: Professional Negligence respondentUK Bar
  • Band 3Chris Greenwood
    Band 3Chris Greenwood

    Chris Greenwood

    Chris Greenwood's well-established professional negligence practice sees him acting in high-stakes construction-related matters. He is regularly sought out by owners, developers, engineers and architects in claims involving commercial and residential properties. He has impressive experience of appearing in High Court claims.

    • Chris is very good on drafting, he is concise and clear.

      Construction: Professional Negligence respondentUK Bar
    • I found him to be excellent in all categories.

      Construction: Professional Negligence respondentUK Bar
  • Band 3Hugh Saunders
    Band 3Hugh Saunders

    Hugh Saunders

    Hugh Saunders has a solid professional negligence practice and vast experience in construction and technology cases, having previously been a software engineer. He is well versed in defective design claims, acting for both claimants and defendants.

    • He's really good and very impressive.

      Construction: Professional Negligence respondentUK Bar
    • Hugh is a client-friendly barrister who rolls his sleeves up and gets stuck in to a case, bringing excellent technical advice and commerciality to it.

      Construction: Professional Negligence respondentUK Bar
    • As ever, he provides rock-solid advice, which is both technical and practical. He is an excellent team player.

      Construction: Professional Negligence respondentUK Bar
  • Band 3Neil Hext
    Band 3Neil Hext

    Neil Hext

    Neil Hext KC is an acclaimed practitioner who is regularly entrusted with high-stakes professional negligence matters. He has considerable experience of both domestic litigation and international arbitration, and handles high-value claims.

    • He's extremely courteous and pleasant. He leaves no stone unturned.

      Construction: Professional Negligence respondentUK Bar
    • He was excellent, really good to work with, very responsive and both his written and oral advocacy were good.

      Construction: Professional Negligence respondentUK Bar
    • He knows his way around the law and really persuades judges.

      Construction: Professional Negligence respondentUK Bar
    • Neil Hext is great. He is an extremely cerebral individual who has a very good manner with clients.

      Construction: Professional Negligence respondentUK Bar
  • New SilksLucy Colter
    New SilksLucy Colter

    Lucy Colter

    Lucy Colter is adept at handling negligence claims against architects and engineers. She has particular expertise in working in disputes involving listed or protected buildings. She has demonstrated superior advocacy skills when acting unled.

    • She's very thorough and a very good lawyer.

      Construction: Professional Negligence respondentUK Bar
    • She is extremely commercial and gets straight to the point. She inspires confidence in her clients.

      Construction: Professional Negligence respondentUK Bar
    • She is comfortable handling the most complex issues on an urgent basis and has a gift for producing straightforward practical advice, which is digestible to clients.

      Construction: Professional Negligence respondentUK Bar

Ranked Barristers at 4 New Square Chambers (9)

All Circuits

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership