What is the Building Safety Act 2022?
The Building Safety Act 2022 is the most significant reform to UK building safety regulations in a generation. Introduced in the wake of the Grenfell Tower tragedy, the Act created a new Building Safety Regulator (BSR) within the Health and Safety Executive and established a three-gateway system for higher-risk buildings. The legislation fundamentally changes how developers design, construct, and manage residential buildings above 18 metres or seven storeys.
For property developers working with development finance, the Act introduces new regulatory checkpoints that directly affect project timelines, cost structures, and lender requirements. Understanding these changes is not optional — non-compliance carries criminal penalties, and lenders are now building Gateway requirements into their facility conditions.
The three gateways correspond to key stages in the development lifecycle: Gateway 1 at the planning stage, Gateway 2 before construction begins, and Gateway 3 before occupation. Of these, Gateway 2 has the most significant impact on development finance structures.
Gateway 2: the pre-construction checkpoint
Gateway 2 requires developers to submit detailed building control applications to the Building Safety Regulator before any construction work can commence on higher-risk buildings. Unlike the previous system where approved inspectors could handle building control, the BSR is now the sole building control authority for these projects.
The application must include comprehensive design documentation demonstrating how the building will meet all functional requirements of the Building Regulations, with particular emphasis on fire safety, structural integrity, and the spread of fire. Developers must also submit a construction control plan showing how building safety will be managed during construction.
The golden thread principle requires developers to create and maintain accurate, up-to-date information about the building's design, construction, and ongoing management. This digital record must be maintained from Gateway 2 through to occupation and beyond, and lenders increasingly want to see evidence that this system is in place.
Critically, the BSR can refuse a Gateway 2 application, request further information, or impose conditions. There is no deemed consent — silence does not equal approval. This creates genuine programme risk that must be accounted for in development finance applications.
Impact on development finance timelines
The most immediate impact of Gateway 2 on development finance is timeline extension. Before the Act, developers could typically proceed from planning approval to site start within a few weeks, subject to building control notification. Gateway 2 introduces a minimum 12-week determination period between planning approval and construction commencement.
In practice, many applications are taking longer than 12 weeks, particularly where the BSR requests additional information or clarification. Some developers have reported determination periods of 16 to 20 weeks. This extended pre-construction period increases land carry costs and interest expense before any construction drawdown occurs.
Development finance facilities are typically structured with an initial land acquisition drawdown followed by staged construction drawdowns. Gateway 2 extends the gap between these phases, meaning borrowers carry the land debt for longer before construction begins. Lenders are adjusting facility terms to accommodate this, including extended availability periods and revised drawdown schedules.
Developers applying for development finance on higher-risk buildings should factor Gateway 2 timelines into their programme from the outset. Presenting a realistic programme that accounts for BSR determination periods demonstrates competence and reduces the risk of the facility expiring before construction completes.
What lenders now require
Development finance lenders have updated their due diligence requirements to reflect the Building Safety Act. For higher-risk buildings, most lenders now require evidence of Gateway 2 approval as a condition precedent to the first construction drawdown. Some lenders require a Gateway 2 application to have been submitted before they will even issue a facility letter.
Beyond the binary approval requirement, lenders are scrutinising the golden thread documentation, the competence of the design team (particularly the principal designer under the new dutyholder regime), and the developer's understanding of their obligations under the Act. Developers who cannot demonstrate familiarity with the new regime may find themselves rejected on capability grounds.
Monitoring surveyors acting for lenders are also incorporating Building Safety Act compliance into their inspection regimes. They will check that construction is proceeding in accordance with the approved Gateway 2 submission and that change control procedures are being followed. Unauthorised changes can trigger a mandatory change control notice to the BSR, creating programme risk.
Cost implications for developers
Gateway 2 compliance adds cost at multiple levels. The BSR charges fees for application determination — currently based on the complexity and size of the building. Professional fees for preparing the detailed submissions are significantly higher than traditional building control applications, as they require more comprehensive design documentation at an earlier stage.
The requirement to appoint a principal designer and principal contractor with demonstrated competence in higher-risk buildings may increase procurement costs. Not all design professionals and contractors have the necessary registration and competence to act in these roles, which can limit competition and increase tender prices.
Developers should reflect these additional costs in their development appraisals and finance applications. Lenders will expect to see Gateway 2 costs itemised in the project budget, and failure to account for them may raise concerns about the developer's understanding of the regulatory environment.
Practical steps for developers
Developers planning higher-risk buildings should engage with the BSR early, ideally during the pre-application stage. The BSR offers a consultation service that can help identify potential issues before the formal Gateway 2 application is submitted. Early engagement reduces the risk of refusal or extended determination periods.
When structuring development finance applications, include a realistic programme that accounts for Gateway 2 determination. Provide evidence of competent appointments (principal designer, principal contractor) and demonstrate understanding of the golden thread requirements. These elements strengthen the credit paper and give lenders confidence that the project will not be derailed by regulatory issues.
For developments below the higher-risk threshold, the Building Safety Act still introduces changes through updated Building Regulations and the new competence requirements for building control. While Gateway 2 does not apply, developers should still be aware of the broader regulatory changes and their impact on costs and timelines.