Contractor Standdown Claims Under GC21: What Falls Outside Their Entitlement
A variation claim lands on your desk. The contractor was held up while additional potholing and service investigations were carried out. They’ve claimed standdown costs for their crew and plant — days of idle time while the investigation work proceeded.
Before you reach for the cheque book, work through what the contract actually says about who carries this risk.
The Context That Changes Everything
Standdown claims on civil infrastructure projects almost always arise from one of two scenarios:
- Unforeseen conditions — the contractor encountered something genuinely outside what could have been anticipated at tender
- Planning or investigation gaps — work that should have been done before construction started (service location, design verification, geotechnical investigation) was not done, and construction had to pause while it was completed
These two scenarios have completely different risk profiles under GC21. Getting them confused is how Principals end up paying for work that was always the contractor’s responsibility.
What GC21 Says About Investigation Obligations
GC21 places an active obligation on contractors to investigate and plan before commencing work. This is not a minor administrative point — it is a fundamental risk allocation principle embedded in the contract structure.
The contractor is required to:
– Examine the site and its surroundings before tendering
– Satisfy themselves as to ground conditions, existing services, and physical constraints
– Include in their price all costs of investigation necessary to execute the works
Where the specifications explicitly require investigation work — service location, potholing, geotechnical assessment — that work is part of the contractor’s scope. A standdown while the contractor completes investigation work they were required to perform is not a compensable event. It is the contractor incurring costs they should have allowed for.
The Standdown Assessment Framework
The Specification Argument
The most powerful tool in rejecting investigation-related standdown claims is the specification itself. On most civil infrastructure projects, the technical specifications explicitly require the contractor to:
- Locate and positively identify underground services before commencing excavation
- Carry out geotechnical investigations to determine material characteristics
- Develop method statements based on site investigation data before work commences
Where these obligations appear in the specifications, they are part of the contractor’s scope. A standdown while the contractor completes their own investigation obligations is not a cost the Principal caused — it is a cost the contractor incurred by not completing their investigation work before mobilising.
The response to these claims is simple: cite the specific specification clause requiring the investigation, note that the obligation sat with the contractor, and decline to assess the claim on the basis that the costs represent work the contractor was always required to perform.
What Remains Payable
Not all standdown claims should be rejected. Where the Principal:
– Directed additional investigation beyond what the specifications required
– Issued a formal instruction to stand down pending a Principal-side decision
– Failed to provide information, access, or a decision within a contractually required timeframe
…the contractor may have a genuine entitlement. The test is always whether the delay was caused by something within the contractor’s obligation, or something within the Principal’s.
Getting this right matters not just for the individual claim, but for the project’s final account. Conceding investigation-related standdown claims sets a precedent and generates further claims. Rejecting them clearly and early, with specific contractual reasoning, tends to reduce the volume of subsequent claims on the same basis.
GC21 document precedence variation claims
how to write a variation claim response
Analysis based on GC21 General Conditions of Contract (construct-only). Project details are not disclosed.