Joinder
This is the joining of a person/s to an action where common questions of law or fact arise.
Many construction disputes are resolved by the major participants to being joined in one proceeding. The benefit of this is that all related disputes are dealt with at once, with the consistency of being resolved by a single judge, jury, adjudicator, arbitration panel and so on.
If a dispute is subject to arbitration, as specified in the contract, then these provisions govern the issue of whether multiple parties can be joined in one arbitration (joinder).
For example, where design flaws are alleged to have contributed to a defect in the construction works, employers may seek to have the design professional(s) added as a party to proceedings to either defend their services or accept liability. Alternatively, two claimants could have a joint right, for example where there are joint contractors suing another party to the contract.
In adjudication proceedings, a party may at any time request additional parties to be joined, subject to the agreement of the adjudicator, existing parties and the additional parties.
When courts are presented with a claim comprising a number of causes of action or parties that have been joined together, they have the power to separate them if the joinder is regarded as inconvenient. This could be because the joinder makes the claim unnecessarily complicated, or may cause delays or increase the costs in the claim.
An alternative to joinder is consolidation. This involves two or more separate claims with a strong link with each other being continued together with one claim being nominated as the lead. For example, this could be appropriate when the same allegations of negligence or breach of contract are made against the same defendant but in relation to different claims. Again, the court must exercise their power to consolidate claims with consideration of the time and cost implications.
[edit] Related articles on Designing Buildings Wiki:
- Adjudication.
- Arbitration.
- Construction Industry Model Arbitration Rules CIMAR.
- Construction litigation.
- Contribution and apportionment.
- Damages in construction contracts.
- Decennial liability.
- Good faith in construction contracts.
- Legal and equitable assignment
- Negligence in building design and construction.
- Novation.
- Recovery of third party losses.
[edit] External references
- ‘The Construction Contracts Book’ (2nd ed.), BRENNAN, D.S. et al, American Bar Association (2008)
- InBrief - Joining participants and causes of action
Featured articles and news
Cutting carbon, cost and risk in estate management
Lessons from Cardiff Met’s “Halve the Half” initiative.
Inspiring the next generation to fulfil an electrified future
Technical Manager at ECA on the importance of engagement between industry and education.
Repairing historic stone and slate roofs
The need for a code of practice and technical advice note.
Environmental compliance; a checklist for 2026
Legislative changes, policy shifts, phased rollouts, and compliance updates to be aware of.
UKCW London to tackle sector’s most pressing issues
AI and skills development, ecology and the environment, policy and planning and more.
Managing building safety risks
Across an existing residential portfolio; a client's perspective.
ECA support for Gate Safe’s Safe School Gates Campaign.
Core construction skills explained
Preparing for a career in construction.
Retrofitting for resilience with the Leicester Resilience Hub
Community-serving facilities, enhanced as support and essential services for climate-related disruptions.
Some of the articles relating to water, here to browse. Any missing?
Recognisable Gothic characters, designed to dramatically spout water away from buildings.
A case study and a warning to would-be developers
Creating four dwellings... after half a century of doing this job, why, oh why, is it so difficult?
Reform of the fire engineering profession
Fire Engineers Advisory Panel: Authoritative Statement, reactions and next steps.
Restoration and renewal of the Palace of Westminster
A complex project of cultural significance from full decant to EMI, opportunities and a potential a way forward.
Apprenticeships and the responsibility we share
Perspectives from the CIOB President as National Apprentice Week comes to a close.
The first line of defence against rain, wind and snow.
Building Safety recap January, 2026
What we missed at the end of last year, and at the start of this.






















