About me



I am a solicitor-advocate specialising in property, construction and engineering disputes.

I am an expert in disputes arising from basement extensions in London and the surrounding areas. I advise banks, large and small development companies as well as private individuals, and have represented parties in many of the leading cases on the Party Wall Act in the High Court and the Court of Appeal.

Recent cases I have advised on include:

  • Acting in the County Court and Court of Appeal in an appeal against a party wall award that clarified the law on ex parte award;
  • Acting for a homeowner owner in Westminster in three successive urgent applications in less than two weeks for injunctions against a £169 million super-prime basement extension; and
  • Acting for a homeowner in Nottingham in an appeal against a party wall award preventing a £9 million development of a bus station

I am the author of the industry text book Practical Party Walls and I am retained by the Royal Institution of Chartered Surveyors to provide professional training to surveyors on the Party Wall Act throughout the UK.

I set up this blog in 2009 as a repository for cases, articles and other useful stuff related to the Party Wall Act. If you would like to receive updates on the Party Wall Act, boundary disputes and related issues then please subscribe to my blog. The site has also expanded to include a Resources section, which includes an annotated copy of the Party Wall Act and a database of case law digests.

what they say about me.

  • His professionalism and knowledge of the law means that he is a formidable opponent and devastating in the courtroom. It is no wonder that his ...

    Sophie Pelham, Solicitor
  • Matthew Hearsum is a specialist in party walls and advises on property, construction and engineering disputes. Clients say: "He is a rare breed of lawyer ...

    Chambers and Partners 2015
  • Matthew is particularly sought after for his specialist knowledge of the law concerning party wall matters

    Chambers and Partners 2013
  • You are being advised by the best - Matthew is an expert at bringing people like your neighbour to heel.

    Mike Tibbatts, Party Wall Surveyor
  • He struck hard where it mattered, anticipated and planned for things before they happened.

    Neil P, Client
  • Matthew is very helpful and knowledgeable about party wall matters and related issues. His abilities go well beyond the basics and have helped me out ...

    Richard Garry, Engineer
  • Matthew is a very energetic litigation solicitor, with a specialist knowledge of party wall and rights of light matters. He looks after his clients exceptionally ...

    Adrian Davies, Barrister
  • I have worked with Matthew on a number of occassions and have always found him to be highly professional and knowledgeable.

    Simon Pole, Structural Engineer
  • I have dealt with Matthew on several occasions and found him to be very Client orientated. He is good on detail and strategy and is ...

    David Toogood, Surveyor