Skyscraper under construction with a crane.

CONSTRUCTION AND ENGINEERING

Collateral Warranties: The Supreme Court decision in Abbey Healthcare

There has been much debate since the Housing Grants Construction and Regeneration Act 1996 (”Construction Act”) came into force as to whether a collateral warranty is a building contract for the purposes of the Construction Act and therefore subject to statutory adjudication.

This has now been clarified by the Supreme Court in Abbey Healthcare (Mill Hill) Ltd v Augusta 2008 LLP (formerly Simply Construct (UK) LLP) [2024] 23, which decided that a typically worded collateral warranty is not a construction contract for the purposes of section 104 of the Construction Act.  The effect of the decision is that there is no statutory right to refer disputes under a collateral warranty to adjudication.

Abbey Healthcare further confirmed that the test for whether a collateral warranty will be a construction contract is as follows:

  1. A collateral warranty will be an agreement “for … the carrying out of construction operations” if it is an agreement by which the contractor undertakes a contractual obligation to the beneficiary to carry out construction operations which is separate and distinct from the contractor’s obligation to do so under the building contract.
  2. A collateral warranty where the contractor is merely warranting its performance of obligations owed to the employer under the building contract, will not be an agreement “for” the carrying out of construction operations.”

Therefore, if the test in (1) above is not satisfied and the parties wish to refer disputes to adjudication, then the parties will need to include a contractual adjudication clause in the collateral warranty.

It is unclear at the moment how the market will approach the inclusion of a contractual adjudication clause in a collateral warranty.  There are arguments for and against doing so.

On the plus side:

  • Adjudication, by comparison to lengthier alternative dispute resolution (ADR) processes (such as arbitration) or court litigation, offers parties a swift, cost-effective form of dispute resolution.
  • Contractual adjudication offers the parties the flexibility to determine the powers of the adjudicator, procedure, timetable and the effect of the decision (for example, whether it is temporarily or finally binding).
  • Parties are free to choose the arbitrator with specific qualifications and professional backgrounds appropriate to the nature of the dispute.
  • The process is likely to remain private (subject to any confidentiality provisions in the collateral warranty). If the adjudication process needs to be adapted

On the negative side:

  • The parties are free to agree whether the adjudication decision is to be temporary or binding.  As claims under a collateral warranty are most likely to arise at the end of the project, and not related to cash flow, a non-binding decision will be of little benefit.
  • Matters are unlikely to be considered in detail, making adjudication inappropriate for complex defects claims more appropriately addressed in proceedings in the courts or arbitration.  If adjudication processes need to be adapted to deal with complex matters, there may not be any significant cost savings particularly where inspections, testing, expert meetings, and the like are required.
  • Adjudication limits the ability to join other parties to the dispute.  This can be provided for in the drafting, but will become complex where related contracts do not contain a similar mechanism.  It is unlikely in most circumstances that multi-party adjudications will result in significant cost savings.
  • Unless specifically provided for, the parties will not be able to recover legal costs.

In conclusion, prior to the decision in Abbey Healthcare there appeared to be little appetite to include a contractual adjudication clause in collateral warranties. However, that is not to say that it may not be appropriate to do so in certain circumstances. Should you wish to discuss this further, or need advice about a dispute relating to collateral warranties, please contact  construction and engineering solicitor Kerry Beattie.

About the authors


about the author img

Kerry Beattie

Partner

Significant experience in non-contentious and contentious construction and engineering, energy and utilities matters and property transactions.

Stay connected, sign up for updates

Stay connected

Recent articles

Insights

Family Investment Companies

Family Investment Companies: what are they, when might they suitable, and how does tax come into play? Our corporate solicitors explain.

04/06/2026

Insights

Defective advice, deficient security: professional negligence in the lending sector

In this article we highlight the areas from which professional negligence claims most frequently arise, and some key considerations for protecting your position.

02/06/2026

Insights

The Renters’ Rights Act 2025: mandatory information sheet for tenants

Failure to provide the Information Sheet within the required timeframe is a breach of the landlord's obligations under the Act with significant financial penalties.

31/05/2026

Insights

Statutory compliance in property finance

Lenders and borrowers should both treat current, satisfactory FRAs, EICRs and asbestos surveys as non-negotiable elements of due diligence. Where deficiencies exist, best endeavours should be used to ensure they are resolved before completion.

29/05/2026

DISCLAIMER:

THIS INFORMATION IS FOR ILLUSTRATIVE PURPOSES AND IS NOT INTENDED TO AMOUNT TO LEGAL ADVICE ON WHICH RELIANCE SHOULD BE PLACED. WE, DMH STALLARD LLP, DISCLAIM ALL LIABILITY AND RESPONSIBILITY ARISING FROM ANY RELIANCE PLACED ON THIS INFORMATION. ANY RELIANCE ON THIS INFORMATION IS SOLELY AT YOUR RISK. The provision of this information does not create a business or professional services relationship. This information is not exhaustive and does not attempt to address every issue relevant to a particular situation. If you require advice on a specific legal issue, please contact a lawyer listed on our website, dmhstallard.com, or send an email to [email protected].