Proportional response for smaller projects

Since the introduction of the Principal Designer role under the Building Regulations, there has been understandable concern from clients and designers about how the role should be applied on smaller projects.

In some cases, this has led to over-application of procedures designed for large or complex schemes, creating unnecessary cost, delay, and confusion.

This is not what the regulations intend.

What does “proportionate” mean?

The Building Regulations require that duties are discharged in a way that is proportionate to the project.

This means taking into account:

• the size of the works
• the complexity of the design
• the level of building safety risk

A small domestic extension does not carry the same risk profile as a multi-storey residential building — and the Principal Designer role should reflect that.

The risk of a one-size-fits-all approach

Applying heavyweight compliance processes to small projects can:

• discourage early design collaboration
• blur responsibility between designers
• increase fees without increasing safety
• frustrate clients and contractors alike

In the worst cases, it can undermine confidence in the Principal Designer role altogether.

What proportional compliance looks like in practice

For smaller projects, a proportionate Principal Designer service may include:

• early review of the design against Building Regulations
• clear allocation of design responsibility
• focused risk identification (rather than exhaustive registers)
• pragmatic coordination with the Principal Contractor
• clear, concise information provided at handover

The emphasis is on clarity and competence, not volume of paperwork.

Supporting existing project teams

A proportionate approach also allows architects, technicians, and engineers to focus on the work they do best, while ensuring that regulatory coordination is properly managed.

The Principal Designer role should support the design team — not duplicate it.

Getting it right from the start

For clients, understanding that the Principal Designer role can be scaled appropriately is key to achieving compliance without unnecessary complexity.

For designers, it provides reassurance that meeting regulatory duties does not mean adopting processes that are disproportionate to the task at hand.

At PD Service, we specialise in delivering practical, proportionate Principal Designer services, particularly for smaller and low-risk projects — ensuring compliance while keeping projects moving.