Why three consultants cost you more than one integrated assessment

The traditional approach to development feasibility looks like this: you engage a town planner to assess the planning controls. You engage an architect to produce a concept design. You engage a quantity surveyor or cost consultant to estimate construction costs. Three professionals, three invoices, three reports.

On paper, this sounds thorough. In practice, it is one of the most expensive ways to get a feasibility assessment, and not because of the fees.

The coordination problem

Each consultant works in their own silo. The planner assesses what the planning scheme permits. The architect designs what they think the site can accommodate. The QS estimates the cost of what the architect has drawn. The problem is that each professional is making assumptions about the other disciplines that may not hold.

The planner might confirm that multiple dwellings are permissible, without flagging that the flood overlay affects 40% of the site and will require the ground floor to be raised 800mm above natural ground level. The architect designs a concept that achieves the setbacks and site coverage requirements, but does not account for the infrastructure easement running through the northern boundary. The QS costs the design as drawn, without knowing that the design will need to change once the planner's conditions are incorporated.

The result is a set of reports that look comprehensive but do not actually represent a buildable, approvable, financially viable project. When these gaps are discovered (usually during the DA process or early construction), the redesign costs, additional consultant fees, and timeline delays can easily exceed the cost of the original reports several times over.

What integration actually means

An integrated assessment does not just mean putting three reports between the same covers. It means having the planning analysis, architectural feasibility, and financial modelling informed by the same data set, produced by people who understand all three disciplines simultaneously.

When we assess a site, the planning constraints directly inform the architectural yield study. If there is a height overlay, we model the maximum permissible building envelope, not a theoretical one. If there are setback requirements from a specific overlay code, those are built into the massing study from the start. The financial model then prices the actual buildable outcome, not a hypothetical one.

This means the numbers you receive reflect what can actually be built and approved on that specific site. Not what could theoretically be built if none of the constraints applied.

The cost comparison

A typical multi-consultant feasibility process on the Sunshine Coast looks something like this: town planner ($8,000 to $15,000), architect concept design ($15,000 to $30,000), quantity surveyor ($5,000 to $12,000). Total: $28,000 to $57,000. Timeframe: four to eight weeks minimum, often longer.

Our integrated assessments start at $8,000 and are delivered in five to seven business days. The price difference is significant, but the real saving is in accuracy. When the planning, architectural, and financial analysis are integrated from the start, there are no gaps between disciplines for costly surprises to hide in.

When do you still need separate consultants?

We are not suggesting that planners, architects, and QS professionals are unnecessary. Once a project moves past the feasibility stage into the detailed design and DA preparation phase, you absolutely need specialist consultants in each discipline.

But at the feasibility stage, when the question is "should we proceed with this site?", an integrated assessment gives you a more accurate answer, faster, and for less money than the traditional three-consultant approach. It is the difference between getting a definitive go or no-go recommendation in a week, and spending two months and $50,000 to arrive at the same conclusion. Learn more about what the numbers actually need to show in a properly constructed feasibility study.