Cost management doesn’t sit in isolation – it’s a team sport. While the cost consultant leads the commercial strategy, effective project managers play a crucial role in ensuring it stays on track.
Critically, having separate cost management and project management consultancies can help ensure transparency and accountability. When both roles are held by the same business, there’s a risk that one discipline may mask the underperformance of the other. Keeping them independent introduces healthy challenge and protects the client’s interests.
Here are some of the key things PMs can do to support robust, reliable cost management from day one:
1. Allow Sensible Time for Design, Cost Planning & Value Engineering
Rushing design stages almost always leads to higher costs later. Giving the team enough time to plan, test options, and value engineer properly makes a big difference to budget control. Think “right first time” rather than “fix it later.”
2. Agree and Track RIBA Stage Deliverables
Each RIBA stage should come with clear deliverables – not just for design output, but for cost and programme alignment. Agreeing what’s needed at each stage and tracking progress against it helps avoid surprises at the next gateway, and allows the cost manager to develop the cost plan to a greater level of detail to improve certainty.
3. Test the Construction Programme
The construction programme drives the prelims budget. Unrealistic durations can push costs up unnecessarily or create pressure later that leads to poor decisions. Market-testing build durations with contractors during the design stage will allow more accurate budgeting.
4. Establish and Follow Governance Processes
Cost certainty depends on decisions being properly recorded and controlled. Make sure the project has a clear governance framework, and that gateway approvals are followed. It protects the budget – and the team.
5. Build in Time for a Pre-Tender Estimate (PTE)
The PTE is a key checkpoint before going to market. It’s the last chance to validate the design against the budget and catch any scope gaps or cost risks. Too often, this gets squeezed. It’s worth the time – and can save significant money.
6. Stay on Top of Instructions
Verbal changes, informal agreements, or unclear client briefings are one of the biggest drivers of cost drift. Get changes confirmed in writing and make sure instructions are communicated clearly across the team.
7. Keep Clear Records and Write Letters
Good documentation isn’t just admin – it’s a form of commercial protection. Meeting minutes, action logs, letters, and file notes all form part of the audit trail that keeps cost control honest and transparent.
Final Thought
Great cost management doesn’t happen in a vacuum. It needs time, structure, and collaboration across the whole team. A weakness in any of the areas above will almost always manifest as a cost problem.
That’s why a well-structured delivery model provides balance, transparency, and the right level of challenge.
Project Managers who create space for these principles to work – and who enforce the right processes – are the ones who consistently deliver on time and on budget.
