The Journey to Building Safety Regulators & Gateways

The Grenfell disaster unveiled not just failures in products or design decisions, but a fragmented regulatory system that struggled to hold anyone clearly accountable. The promise of a new regulator was straightforward in principle. It aimed to establish safer buildings, with clearer responsibility, and a regulator with genuine authority.

In practice, the journey has been far more complicated. Nearly four years on from the establishment of the Building Safety Regulator, and more than two years into the operation of Gateways 2 and 3, the industry and regulator are finding a way to work together to achieve approvals, enabling the construction of necessary new housing. Confidence, in the built environment, is not fully restored, but the system is beginning to settle.

The Building Safety Regulator was established in 2021. Initially housed within the Health and Safety Executive, it gained full statutory powers under the Building Safety Act 2022. Its remit was always ambitious, aiming to ensure oversight of higher-risk buildings and competence reform across the sector.

In January 2026, BSR became a standalone arm’s-length body (ALB) under the Ministry of Housing, Communities and Local Government. More than just an administrative change, this signals a recognition that building safety regulation is now a permanent, central function of government rather than an addition to existing systems.

It also reflects a quiet acknowledgement that the early operating model, while necessary to establish the regulator, was not sufficient once Gateway applications began arriving at scale. For much of 2023 and 2024, Gateway 2 exposed weaknesses on all sides, from inconsistent application quality and unclear expectations to stretched regulatory capacity. This was all baring on the shoulders on an industry learning how to balance new requirements with delivering live projects.

Delays became the headline both politically and, in the press, but beneath the interruptions sat something more fundamental: a system being developed in real time. When MPs approved the Building Safety Act, they were evidently not aware of the unintended consequences of stringent regula-tions on a sector which was not physically prepared.

Gateway 2 was always going to be the toughest phase in the process. It is where design intent, competence, fire strategy, change control and construction planning converge into a single submission. It is also the point at which regulatory scrutiny becomes unavoidable.

By the end of 2025, 152 national new-build applications were awaiting Gateway 2 approval by the BSR, representing 33,670 housing units. This number alone reveals the intensity of political and industry attention. These are not marginal schemes, but major contributors to housing supply. Of those applications, 27 (6,192 homes) are now being managed through the newly established BSR Innovation Unit, which is consistently meeting the 12-week service level agreement. The contrast with the wider system is indicative. It demonstrates that Gateway 2 can operate effectively when the right structures are in place.

One of the most challenging aspects of the new regime has been the treatment of transitional higher- risk buildings, i.e., projects that commenced under the old regulatory framework but crossed into the new system mid-delivery. In September, a request for ministerial approval to allow 27 buildings to return safely to the previous regime for completion was resubmitted. Highlighting a practical reality, this regulation must be rigorous but also recognise the complexity of live construction programmes.

Where life-safety critical defects exist, BSR has been clear that buildings will remain under Gateway 2 and Gateway 3 control. It is a difficult but necessary position. However, the transitional period has exposed how hard it is to retrofit regulatory clarity onto projects that were never designed to operate under this level of scrutiny.

There has been a tendency to frame Gateway delays as purely regulatory. The data suggests something more nuanced. Within current applications, blockers are distributed across the system:

Distribution like this is vital. Gateway 2 is not failing due to due to one single flaw, instead it is exposing the harsh reality of compliance; it is reliant on several scarce competencies aligning at once, with consistent evidence and clear accountability.

Despite all of this, the structural issue of capacity persists, particu-larly at the senior end of the building control profession. As of July 2024, there were approximately: 464 Class 3 inspectors, 516 Class 4 inspectors

These are the inspectors qualified to oversee the most complex higher-risk buildings. Fewer than 1,000 people in the UK sit at the top of the competency framework for a regime that now governs tens of thousands of homes. This is not a criticism of individuals, rather recognition that the Building Safety Act significantly increased demand for highly experienced technical judgment. Capacity cannot be created overnight, and the system is still adjusting to this new reality.

The creation of the BSR Innovation Unit in August 2025 is one of the most important developments to date. Established in response to mounting criticism, delays and political pressure, it introduced a centralised, and multi-disciplinary review model. Early results show it working in real time. Meeting a 12-week SLA consist-ently in this context is impressive. More importantly, it represents a regulator willing to adapt its operat-ing model rather than defend it.

While most attention has focused on Gateway 2, Gateway 3 is quietly emerging. Completion and occupation place a different kind of pressure on the system. Delays at Gateway 3 affect not just deliveries but also residents and operators. One key lesson from Gateway 2 permeates: The Golden Thread cannot be assembled at the end of a project. Evidence, change control and compliance need to be managed continuously throughout the entire construction process. Projects that treat Gateway 3 as an administrative exercise risk repeating the mistakes of the early Gateway 2 experience.

We cannot claim that things have not improved, when the signs are obvious. The regulator is now structurally independent and more confident in its role. Guidance is more evident and application quality is improving as teams determine what “good” looks like. The Innovation Unit demonstrates that efficiency and rigour are not mutually exclusive.

Perhaps most importantly, the conversation has shifted. The focus is moving away from assigning blame and towards understanding how the system can operate more predictably and effectively.

The direction of travel is becoming clearer, with fewer but better applications, earlier engagement with regulatory intent and a stronger emphasis on competence and evidence. Digital systems that support audit rather than simply storing information. Gateway 3 is being treated with the same severity as Gateway 2.

The idea of a single construction regulator no longer feels theoretical. The industry is no longer considering whether this regime can endure, but instead how quickly we adapt our processes and behaviours to work confidently within it. The journey so far has been occasionally frustrating, and often uncomfortable, but it is also the story of a system beginning to mature. And that, ultimately, is how lasting change occurs.