
In light of the sudden failure of Assent Building Control and its associated companies, the Health and Safety Executive (HSE) has moved swiftly to issue emergency guidance for higher-risk construction schemes. The collapse of Assent has created a regulatory and operational challenge for projects underway across the UK — and in this article we outline exactly what you as a developer, contractor or building owner must do now, how the guidance affects you, and what best practice steps you should adopt.
Why the Assent Collapse Matters for Building Control and Safety
The company Assent Building Control (alongside its subsidiaries) reportedly handled more than 30,000 projects a year and was registered as a building control approver under the Building Safety Regulator (BSR.)
When it ceased trading, this triggered disruption for both higher-risk buildings (HRBs) and non-HRB schemes:
- The collapse left at least ten high-rise schemes in limbo at Gateway 2 stage.
- The BSR has taken on responsibility for higher-risk schemes previously held by Assent, while non-HRB schemes revert to local authority unless a new registered building control approver (RBCA) is appointed.
The risk is that delays in building control approval, reallocation of oversight and confusion over responsibilities may lead to increased cost, programme disruption or – critically – compromised fire and structural safety. In this volatile environment, the HSE’s emergency guidance is effectively a regulatory “stop-work and reassess” directive for impacted sites.
Key Requirements of HSE’s Emergency Guidance
Immediate cessation and reassessment of higher-risk building projects
For projects classified as higher-risk buildings (HRBs) under the Building Safety Act regime, the guidance states that work must stop and cannot restart until approval to restart is obtained from the BSR.
Non-HRB projects: appointment of a new RBCA within 7 days
For non-higher-risk building works:
- The developer/owner must appoint an alternative registered building control approver (RBCA) within seven days of the cancellation notice issued by Assent (or its subsidiaries.)
- That new RBCA must submit a new “initial notice” to the local authority within seven days of the appointment.
- If no new initial notice is submitted within the required timeframe, the project defaults to the local authority for control.
Responsibilities for principal contractors, developers and duty-holders
Under the guidance, key duty-holders must:
- Verify whether their project is HRB or non-HRB.
- Confirm whether Assent or its subsidiaries were acting as RBCA for their scheme.
- Secure documentation (cancellation notice, project status, initial notices, etc).
- Liaise with the BSR (for HRBs) or the relevant local authority (for non-HRBs) to secure continuity of building control.
- Review risk assessments, fire-safety documentation and building-control condition compliance as part of the hand-over.
What It Means For Project Timelines and Cost Control
Programme disruption and potential cost increase
The immediate halting of higher-risk projects until approval is secured will inevitably delay programmes. With at least ten high-rise schemes already identified as affected, the ripple effect across construction supply-chains is clear.
Delays may incur additional contractor standing time, remobilisation costs or more expensive design/approval routes via the BSR.
Risk of insurance/contractual implications
Projects governed by contract conditions (eg. JCT, NEC) must consider:
- Whether the cessation constitutes a change event or employer’s risk.
- The potential liability for stand-down, latent defects or remobilisation.
- Insurance cover may be challenged if building-control arrangements are seen as materially disrupted.
Impact on remediation and regulatory compliance
For HRBs especially, time is not on your side: legislative deadlines (for example under the Building Safety Act) must still be met. Failure to timely re-submit or continue may also draw enforcement action from the HSE or the BSR.
Best Practice Steps for Developers, Contractors and Duty-holders
Here is a practical checklist to navigate the disruption:
- Identify all schemes where Assent/its subsidiaries acted as RBCA.
- Categorise each project as HRB vs non-HRB by reference to the Building Safety Act definitions.
- Secure all cancellation notices and project documentation from Assent/RBCA.
- For HRBs – contact the BSR immediately, submit new application for building-control approval, and implement hold on site work until approval is confirmed.
- For non-HRBs – appoint a replacement RBCA within seven days and ensure a new initial notice is submitted to the local authority within seven days.
- Communicate with your supply-chain and finance teams to model cost/risk exposure from delays or remobilisation.
- Review contracts and insurance policies to determine the effect of the disruption and safeguard your position.
- Update your site safety file, fire-safety strategy and condition surveys to reflect any change in building-control oversight.
- Engage with your accounting adviser (such as CMA Accountancy) for financial implications, including cash-flow, cost overruns and contingencies.
- Monitor regulatory updates from both the HSE and the BSR — further guidance may follow as the sector responds.
Why This Guidance Signals Broader Industry Risks
The abrupt failure of Assent not only poses immediate project-specific disruption but also catalyses concern over sector resilience, capacity in building control and regulatory integrity. Some key issues emerging:
- The collapse raises questions over oversight of building-control companies, their financial resilience and their role in higher-risk building projects.
- With a heavy workload transferring to the BSR and local authorities, resource bottlenecks may develop, further exacerbating delays.
- Developers and contractors must now build contingency planning for building-control failure, not simply design/construction risk.
- From a fire-safety, health & safety and regulatory compliance perspective, the event is a reminder that duty-holders cannot rely solely on third-party approvers but must maintain oversight of control arrangements themselves.
While this guidance originates in the high-rise/residential sectors, its lessons extend into the logistics and haulage sector and for fleet operators in a number of ways:
- Companies with in-house premises, multi-storey logistics hubs or multi-tenant industrial buildings must check whether their building-control approver has changed or is at risk.
- If buildings are under construction or extension, the collapse of an approver firm may delay occupation, affecting logistics roll-out, warehousing availability and contractor mobilisation.
- Insurance and bond providers (such as those engaged by haulage firms expanding depots) will treat this as a warning sign: due diligence must include verifying the stability of the building-control supply-chain.
- Smaller businesses should consult firms such as CMA Accountancy to assess the financial impact of any delay or change in building-control approval on cash-flow, project finance and contractual commitments.
The HSE’s emergency guidance issued after the Assent collapse is a wake-up call for the construction sector – and for developers, contractors and duty-holders it demands immediate action. By taking a systematic approach — identifying affected projects, categorising them correctly, engaging with the appropriate regulator and updating contracts/insurance — stakeholders can mitigate delay, liability and cost. The collapse of a building-control firm may seem niche, but its consequences are wide-ranging and underline the importance of robust risk-management across all stages of the build-process.

















