Who Is Responsible for Underground Utilities on a UK Civils Project?
On UK civils projects, responsibility for underground utilities is often shared — but not always clearly defined. While asset owners retain ownership of their infrastructure, principal contractors are responsible for safe coordination, verification and management of utility risk during construction. Failure to clarify this early is one of the main causes of programme delay, rework and service strikes.
Utility detection in progress on a UK construction site. Identifying and verifying buried services is a shared responsibility between designers, contractors, and surveyors to reduce risk and prevent service strikes.
Why Utility Responsibility Causes Confusion
We regularly see projects where:
Records are assumed to be accurate
Designers assume detection will happen later
Contractors assume utilities are already verified
Subcontractors assume someone else owns the risk
The problem isn’t ownership — it’s coordination.
What the Law Actually Requires
Under the Health and Safety at Work Act and CDM regulations, principal contractors must plan, manage and monitor construction work safely.
The HSE guidance on avoiding underground services makes clear that:
✔ Utility records alone are not enough
✔ Detection and verification are required before excavation
✔ Safe systems of work must be in place
Responsibility cannot be delegated away by assumption.
Where Responsibility Usually Sits in Practice
Asset Owner
--> Owns the infrastructure.
Designer
--> Identifies known services and constraints.
Principal Contractor
--> Responsible for coordinating investigation and managing risk during construction.
Subcontractors
--> Must work within the verified system and report discrepancies.
Clarity at tender stage prevents conflict later.
Common Risk Points We See on Site
On highways and civils schemes across Hertfordshire, Essex and Cambridgeshire:
PAS 128 surveys booked too late
Desktop searches relied upon for excavation
Utility clashes discovered during kerb install
Drainage packages hitting unidentified services
These aren’t technical failures — they’re sequencing failures.
How Utility Responsibility Links to Programme
When responsibility is unclear:
Investigations are delayed
Excavation pauses
Variations increase
Claims follow
Early coordination reduces:
Emergency GPR call-outs
Night shifts
Highway authority delays
Practical Steps for Main Contractors
✔ Clarify responsibility in pre-start meetings
✔ Commission PAS 128 surveys early
✔ Integrate findings into design revisions
✔ Mark and brief all trades
✔ Update risk assessments after verification
Professional bodies such as the Institution of Civil Engineers emphasise competence and coordination as core engineering duties.
Limitations
A PAS 128 survey reduces risk — it does not eliminate it
Records may still be incomplete
Service depth can vary
Verification must be ongoing
Planning excavation works? 👉 Visit www.aknengineering.co.uk or call us today to discuss your project on 01279 927 033