Is it becoming harder to justify traditional procurement for office fit-outs? Should a structured “Detail & Build ” approach now be the default?

This will likely be a divisive view, and that is intentional. The aim of this article is discussion, not prescription.
Traditional procurement still has it’s place. Some organisations have genuinely bespoke requirements, complex governance structures, or architectural drivers that demand full design completion prior to contractor engagement.

From what we see day-to-day, it’s actually the minority.

For most occupiers undertaking an office fit-out, a properly structured Detail & Build procurement route now provides better cost certainty, better programme outcomes, and comparable levels of quality.

The procurement decision is being made too late.

One of the most influential decisions affecting risk, cost and programme is procurement strategy. Yet it is commonly addressed after the board has already approved a project budget.

By the time a cost consultant is appointed, a headline approved budget usually exists.

Our first task becomes testing whether the approved budget aligns with the intended scope. Frequently, it does not.

This matters because procurement strategy directly affects cost structure. If a project is budgeted assuming one delivery model but procured under another, problems are inevitable.

This article is not about early budgeting itself, but it is closely related. Procurement options must be considered during budget formation, otherwise the decision is constrained before the project even begins.

The traditional model worked, but the market changed. Historically, larger fit-outs defaulted to traditional procurement:

• Fully developed design

• Tier 1 contractor pricing a completed package

• Full professional team retaining design control

For decades this functioned well. Design teams were resourced properly, contractor roles were clearly defined, and responsibilities were understood by both sides.

However the market has shifted, particularly over the past five years. Contractors increasingy carry more design responsibility through Contractor Design Portions.

Over time, these portions expanded until the distinction between “traditional” and contractor-led design is somewhat blurred.

Today most Tier 1 fit-out contractors operate comfortably in a shared design environment. They employ architects, engineers and technical coordinators internally. The industry effectively evolved while procurement strategies stayed the same.

The consequence is a growing mismatch between process and reality.

Clients still fund a fully external design team meanwhile contractors are now responsible for resolving coordination, buildability and sequencing risk after appointment.

The case against traditional procurement

There are three recurring issues we now observe on traditionally procured office projects.

1. Fee weight
Full professional teams can reach 11 - 18% of construction value on medium to large fit-outs. (Which can be £ millions in fees on larger schemes.) Boards increasingly challenge this at early budgeting stages, particularly where commercial rather than architectural outcomes drive the project.
2. Late cost movement
Even with detailed design, post-contract variations remain common. Design coordination gaps and late technical decisions still frequently occur, and sometimes materially. The perception of cost certainty does not always match the reality.
3. Responsibility fragmentation
When design sits fully outside delivery, buildability often becomes a downstream exercise. Contractors price a solution they did not shape, then manage the consequences during construction. None of these are failures of individuals. They are structural outcomes of an outdated model developed for a different market.

What Detail & Build actually means
Detail & Build is often misunderstood as the client handing design control to the contractor, and when poorly managed that criticism is fair. However, when structured correctly the reality is quite different. The client, supported by independent consultants, prepares a clear set of Employer’s Requirements which define the performance, quality standards and outcomes the finished workplace must achieve, rather than attempting to fully resolve every drawing before a contractor is involved.

The contractor is then appointed to develop the detailed design and deliver the project for an agreed cost, meaning they are not simply pricing someone else’s solution but taking ownership of one they must stand behind.

This distinction materially changes behaviour. Buildability, sequencing and coordination are considered while the technical design is still flexible, rather than becoming a construction-stage problem once information is already fixed. Design rigour is not removed; it is repositioned to a stage where it can actively influence cost instead of reacting to it after commitments have been made.

The financial effect is usually the first thing clients notice. Under a traditional route, a full external professional team fee can approach 18% of construction value on a medium to large office fit-out.

A structured Detail & Build approach typically reduces this to sub 10%. The saving does not come simply from appointing fewer consultants, but from removing duplicated design development and the redesign that occurs once contractor input is introduced. More importantly, a higher level of genuine cost certainty is achieved earlier because the party responsible for delivering the project is also responsible for resolving the technical detail.

The critical condition: independent oversight
This route only works when the client utilises independent professional oversight.

Without it, the contractor quite reasonably optimises for their own risk position.

Four stages of oversight are essential:
1. Early budgeting support before board approval
2. Input during early design stages (Employer’s Requirements) to ensure budget alignment
3. Commercial and contractual negotiation (contractor selection)
4. Post-contract cost and project monitoring
Where these exist, Detail & Build becomes a controlled, powerful procurement strategy.

Where it works best
In my opinion, this approach can suit most commercial occupiers whose objective is a high-quality workplace delivered on time, and on budget. It is less suited to projects where architecture itself is the primary objective or where technical complexity dominates the brief.

At the start of a relocation project, procurement should be a deliberate decision rather than a default. In many cases a structured Detail & Build route deserves to be considered first, not last.

Starting properly
In practice, procurement becomes a logical output of early budget definition. Once scope, risk tolerance, programme drivers and success metrics are clear, the appropriate route is usually obvious.
I have recorded a short masterclass explaining how these early budget decisions shape project outcomes.

Budget Clarity Masterclass: learn.fidgens.com/masterclass