Compliance checking used to be the endpoint. A consultancy would review drawings, flag issues, and confirm that a project met the required standards before work progressed. That model worked well enough when regulation operated in the background, but the Building Safety Act 2022 changed the expectations placed on consultancies at a fundamental level.
Under the current regime, firms working on higher-risk buildings are now expected to be involved far earlier and to stay involved far longer. The Building Safety Regulator has introduced a more structured approach to oversight, one that requires evidence, coordination, and clear lines of accountability at every stage from initial design through to occupation. Building control is no longer a box to tick toward the end of a project.
What this means in practice is that consultancies are being asked to interpret risk, prepare documentation that can withstand regulatory scrutiny, support gateway approvals, and help clients understand their obligations in a way that goes well beyond traditional sign-off activity. The role has broadened, and the weight of responsibility that comes with it has grown considerably.
What Has Changed for Consultancies
The core shift is one of timing and scope. Consultancies are now expected to contribute earlier and more continuously across design, approval, construction, and occupation stages, rather than arriving at the end of a project to confirm that requirements have been met.
That change is directly tied to the Building Safety Act 2022, the establishment of the Building Safety Regulator, and the heightened scrutiny applied to higher-risk buildings. Together, these developments have made it clear that building control is not a final checkpoint but an ongoing process with formal accountability at every stage.
The practical implication is that consultancy work now includes risk interpretation, evidence preparation, coordination support, and the development of accountability frameworks. These are not extensions of the old sign-off function; they represent a genuinely different kind of professional involvement, one that begins earlier, carries more weight, and continues well beyond the point where a project was once considered complete.
Why the Old Compliance Model No Longer Works
The previous end-stage checking model became insufficient once regulatory scrutiny tightened, formal dutyholder roles were introduced, and approval gateways were restructured to require substantive evidence rather than retrospective confirmation. Understanding why that happened requires looking at where the pressure originated.
From Grenfell to a New Dutyholder Regime
The shift in how the industry approaches building safety did not happen in isolation. The Grenfell Tower fire in 2017 exposed systemic failures across design, construction, and oversight, and the subsequent Hackitt review made clear that the existing regulatory framework was too fragmented to prevent similar outcomes.
The Building Safety Act that followed created formal dutyholder roles, placing legal responsibility on identifiable individuals and organisations at every stage of a project. The Health and Safety Executive, operating through the Building Safety Regulator, now expects documented evidence of competency requirements being met, not informal assurances or retrospective sign-off. Professional competence became a requirement that had to be demonstrated, not assumed.
Why Gateway 2 Raised the Stakes for Advice
Gateway 2 sits at the point where detailed design is submitted for regulatory approval before construction can begin. Under the official regulations, work cannot proceed until the Building Safety Regulator is satisfied that the design meets safety requirements, which means errors or gaps at this stage do not simply trigger a revision note. They trigger regulatory bottlenecks that can halt a programme, delay procurement, and force redesign work at the most expensive possible moment in the project timeline.
This is where the old model of late-stage checking becomes genuinely unworkable. Identifying a compliance problem after a Gateway 2 submission has been prepared carries consequences that earlier involvement would have avoided entirely.
How Consultancies Now Shape Projects Upstream
The expansion of consultancy involvement upstream is one of the most significant practical changes to emerge from the current regulatory environment. Rather than waiting until a design is largely fixed, many firms are now embedded in projects from the earliest stages, when the cost of changing course is still low and the opportunity to influence outcomes is greatest.
Advising During Concept and Early Design
The point at which a consultancy joins a project has shifted considerably. Where involvement once began at the technical review stage, many firms are now embedded during concept development, when design decisions are still fluid and the cost of changing course is low.
At this stage, the most valuable input tends to centre on fire safety strategy, Approved Document B interpretation, and the buildability implications of early design choices. Higher-risk buildings in particular require a level of regulatory literacy from the outset, because decisions made about means of escape, compartmentation, or structural form can define the compliance position of the entire scheme before a single detailed drawing is produced.
Project teams increasingly rely on coordinated technical input before statutory submissions are fixed, and engineering consultancy services that extend into pre-application and early design phases are now part of the project team from the first substantive design conversations, rather than arriving once the architecture is largely settled.
Preventing Redesign and Approval Delays
The downstream benefit of that earlier involvement is a measurable reduction in redesign, rework, and the kind of programme disruption that a poorly prepared Gateway 2 submission creates.
When building control requirements and fire safety standards are understood at concept stage, the detailed design can be developed around them rather than reconciled with them later. That distinction matters because late reconciliation almost always means change, and change at the submission or post-tender stage carries a cost that early coordination avoids.
Compliance with Approved Document B is harder to retrofit into a design than it is to build in from the start. Consultancies working upstream help ensure that by the time a Gateway 2 submission is being prepared, the documentation reflects a design that was developed with regulatory requirements in mind, not one that has been adjusted to meet them.
The Role Now Runs Across the Whole Lifecycle
The upstream shift described above is only part of the picture. Equally significant is the extension of consultancy responsibility beyond design and approvals into documentation continuity, evidence management, and operational readiness across the full building lifecycle.
Managing the Golden Thread in Practice
The Building Safety Act introduced the concept of the Golden Thread as a mandatory information standard, not an aspirational one. Every higher-risk building must now have a structured, accessible record of decisions, changes, and evidence that can be followed from initial design through to occupation and beyond.
For consultancies, this changes the nature of documentation considerably. It is no longer sufficient to produce reports that satisfy a specific approval stage and then move on. Records must be traceable, version-controlled, and maintained in a way that supports ongoing accountability for all dutyholders involved in the project.
In practice, this means consultancies are increasingly responsible for helping clients understand what information needs to be captured, in what format, and how it should be transferred between design teams, contractors, and building owners as the project moves through each phase of the building lifecycle.
Supporting Safety Case Readiness After Handover
The consultancy role does not end at practical completion. For higher-risk buildings, the accountable person must be able to demonstrate that the building is safe to occupy, and the safety case that supports that position depends on the quality of documentation built up throughout the project.
Where remediation work is involved, that responsibility becomes more complex still. Consultancies are often asked to support safety case preparation by contextualising earlier design decisions, evidencing compliance with building control requirements, and helping accountable persons understand what the existing record does and does not confirm.
This extended involvement reflects a broader shift: the role now bridges design teams, contractors, owners, and regulators over time, rather than concluding at any single handover point.
Why Consultancies Are Reorganising Internally
The demands placed on consultancies now require a different kind of team. Single-discipline checking functions are giving way to multi-disciplinary integration, where fire engineering, building surveying, technical compliance, and regulatory advisory expertise sit alongside each other and operate in coordination rather than in sequence.
This shift reflects what clients are actually asking for. A project team trying to navigate Gateway approvals, dutyholder obligations, and the Golden Thread cannot work effectively with advisors who operate in silos. They need joined-up advice from professionals who understand how each discipline affects the others, particularly where fire safety decisions interact with structural choices or building control requirements.
Professional competence has become central to how consultancies define and communicate their offer. Competency requirements under the current regime are documented and demonstrable, which means firms must be confident that the individuals delivering advice meet the standard expected by the Building Safety Regulator. That has accelerated internal restructuring, with many consultancies rethinking team compositions, supervision models, and how cross-discipline coordination is managed across complex projects.
Conclusion
The Building Safety Act 2022 has done more than update the rules. It has repositioned where accountability sits, when it begins, and how long it must be sustained across the building lifecycle.
Consultancies that once operated as late-stage checkers are now expected to carry responsibility through early design, Gateway approvals, occupation, and beyond. The value they add comes from reducing risk at the point when it is still manageable, and from maintaining the standard of compliance evidence that dutyholders and regulators now require.
That shift is structural, not temporary, and the consultancies adapting to it are redefining what professional accountability looks like across the industry.
