The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon

Keystone Law

Work 020 3319 3700
Fax 0845 458 9398
Belfast, Belfast BT2, Bristol, Douglas, Guernsey, London

Jason Kallis

Work 020 7152 6550
Keystone Law

Work Department

Construction / property litigation


Jason is a disputes lawyer specialising in insurance, construction, product liability, and property litigation. He acts for blue chip construction and property companies, insurance companies and their Insureds, high-net-worth individuals, retailers and estate managers.

Jason has extensive experience advising on product liability and professional negligence claims. In particular he advises on all insurance policy issues that arise out of disputes concerning products and professionals, including the recovery of insurance premiums on behalf of insurance companies and insureds.

He also has a wealth of experience of disputes concerning high-end residential properties, office developments, and small to medium sized civil engineering projects.

He advises on business disputes concerning small and medium sized companies, particularly in relation to partnership disputes, purchase agreement disputes, shareholder disputes, tax related disputes and general commercial litigation issues faced by such entities.

He has provided non-contentious advice on property developments to lenders, landowners, contractors and developers, and has advised on and drafted building contracts, warranties, and professional appointments.


2014 Keystone Law Consultant Solicitor
2012-2014 Plexus Law Associate Partner
2009-2012 DAC Beachcroft LLP Associate Solicitor
2004-2009 Mishcon de Reya | Associate Solicitor
2003-2004 Sherrards | Associate Solicitor
2000 Qualified as a Solicitor
1998-2003 Elliots Bond & Banbury | Trainee Solicitor then Assistant Solicitor

London: Insurance

Insurance and reinsurance litigation

Within: Insurance and reinsurance litigation

The ‘professional and dedicatedKeystone Law ‘fully understands the insurance market and the type of advice that is required to assist its clients’. Employers’ and public liability claims specialist Steven Conway co-heads the practice with Jason Kallis, a litigator who specialises in construction, product liability and property. In a recent highlight, Kallis, who is ‘intelligent yet down to earth and gives concise and accurate advice which helps insurers get to the crux of the matter’, defended pool equipment manufacturer Certikin International and its insurers against a £3.1m claim over an allegedly defective pool liner.

[back to top]

Back to index

Legal Developments in London

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to
  • The legal difference between a consultant and an employee according to Nicaraguan Law

    Knowing the legal difference between a consultant and an employee is important for a company that needs to hire someone in Nicaragua or for a person interested in rendering services for a company or another person, due to the fact that the nature of the contractual relationship will determine many factors that both parties must be aware of before executing the contracting modality that will govern the relationship between them - the nature of the contractual relationship impacts on the employment benefits, tax implications and liabilities that the parties must comply with according to the law.  labor_law_in_nicaragua
  • Single director - shareholder Companies according to the Nicaraguan legal system

    What is a Single Shareholder and Director legal entity?
  • Business in Nicaragua- The Most Important Changes in the Recent Tax Reform

    In recent years, the country ́s the government has been committed to improving Taxation in Nicaragua and attempting to follow the legislative model used by some of the other countries in the region. Starting January 1st, 2013, a new tax law (Law No. 822, Tax Concertation Law) came into force in and completely changed the taxation system in Nicaragua. Two years later a new law was issued by the National Assembly containing more than 80 amendments, additions and repeals (Law No 891) which came into force December 18th, 2014.