Cost Consultant Interview Questions UK: 8 Real Questions and What Interviewers Want

Before your Cost Consultant interview, it helps to see the questions from the interviewer's side. We have picked eight from our set of 12 and added the reason each one gets asked.

Eight Cost Consultant interview questions, and what the interviewer is thinking

1. How do you prepare a cost plan at the early design stages, and how does it relate to the RIBA Plan of Work and NRM1?

Why they ask: Cost planning is the core of the cost consultant's work and they want to see method and standards.

2. What is the role of NRM2 and how would you measure and price a simple package to produce a bill of quantities?

Why they ask: They want to see that you can measure and describe work in accordance with UK standards.

3. What does a cost consultant do on a typical project, and why did you choose this career?

Why they ask: They want to see you understand the consultancy side and the client-facing aspects of the role.

4. How do you run a value engineering exercise, and how do you keep it from reducing quality or the client's objectives?

Why they ask: Value engineering is a regular task and they need to see that you deliver savings sensibly.

5. How do you assess a contractor's interim valuation, and what do you check before recommending payment?

Why they ask: Valuations are a frequent cost consultant task with legal timing and financial accuracy implications.

6. How do cost consultants contribute to whole-life costing and carbon assessment in current UK projects?

Why they ask: Clients increasingly ask for cost advice linked to net zero and operational cost.

7. At RIBA Stage 3, your cost plan is 2.5 million pounds over the client's 8 million budget. How do you handle it?

Why they ask: They want to see how you deal with an uncomfortable message and options.

8. Tell me about a time you identified significant savings on a project. How did you find them and what was the result?

Why they ask: They want evidence that your cost advice delivers real value.

A sample answer to question 1

How do you prepare a cost plan at the early design stages, and how does it relate to the RIBA Plan of Work and NRM1?

At RIBA Stage 1 or 2, I would begin with an order of cost estimate based on gross internal floor area and benchmark rates from comparable projects, using BCIS data adjusted for location, specification and market conditions. As the design develops at Stage 2 and 3, I move to an elemental cost plan, following the New Rules of Measurement, NRM1, which structures cost by group elements such as substructure, superstructure, finishes and services, plus facilitating works, preliminaries, overheads and profit, and risk allowances. I use quantities where available, and rates from recent tenders and supplier quotes. I include design development allowances, construction contingency and client contingency, as well as inflation to the tender date. Each cost plan stage includes a list of assumptions, exclusions and areas of uncertainty, and I compare it to the client's budget. I then update it at each design freeze and reconcile the changes.

Common mistake to avoid: Presenting one figure without assumptions; ignoring inflation to tender date

Want the rest?

Full model answers, key points and common mistakes for all 12 questions are on the Cost Consultant interview questions page. The first five are free, no sign-up needed.