As Gateway 3 becomes established across Higher-Risk Building projects, building owners, consultants and delivery teams are adapting to a new level of regulatory oversight.
The Completion Certificate requires evidence that the completed building work complies with the applicable Building Regulations and has been delivered in accordance with the approved and subsequently controlled design information.
This means that planning for Gateway 3 begins long before practical completion. Understanding what information is required, early preparation, accurate information management and collaboration across the project team are now critical to avoiding delays.
What is Gateway 3?
Gateway 3 is the final regulatory stage for Higher-Risk Buildings before project completion. Before issuing a Completion Certificate, the Building Safety Regulator will consider the completed physical works, inspect the work and review the supporting compliance evidence.
For a new Higher-Risk Building, the building cannot legally be occupied until the relevant Compliance Certificate has been issued and the building has been registered for occupation.
For façade remediation and other work to an existing occupied Higher-Risk Building, the building can generally remain occupied while the work is carried out. A Completion Certificate is still required for the completed building work.
Why does it matter?
For refurbishment projects on occupied Higher-Risk Buildings, Gateway 3 isn’t simply another approval stage – it can influence programme completion and handover arrangements.
The focus is now on demonstrating compliance, which requires detailed records throughout the project, clear evidence of design changes, product information, installation records and quality assurance documentation.
Much of the information required at Gateway 3 is generated throughout design and construction. The better organised the project is from day one, the smoother the approval process becomes.
Common Challenges
Gateway 3 is fundamentally an information management exercise as much as a construction process. Waiting until the end of the project to assemble evidence can create unnecessary pressure and potential delays where:
- information has not been gathered throughout construction
- design changes haven’t been properly recorded
- subcontractor records are incomplete
- evidence is produced retrospectively rather than progressively
Plan Early
Successful Gateway 3 submissions aren’t built at the end of a project – they’re built throughout it.
By considering evidence requirements from the outset, maintaining the Golden Thread throughout delivery and embedding quality assurance into every stage of construction, project teams can significantly reduce cost and programme risk.
Common Misconceptions
Gateway 3 only applies to new buildings.
The Completion Certificate process also applies to regulated building work carried out to existing Higher-Risk Buildings.
The paperwork is completed at the end.
Much of the required evidence should be captured throughout the project.
It’s a Building Control sign-off.
It’s a Building Safety Regulator approval supported by comprehensive evidence.
How TSL Supports Compliance
At TSL, Gateway 3 planning begins during pre-construction, not at project completion. Our experienced design, pre-construction and delivery teams work together to capture the information required throughout the project, helping clients maintain the Golden Thread and prepare for successful Building Safety Regulator submissions.
By integrating quality assurance, competence management, change control and Golden Thread principles into everyday project delivery, we help clients reduce programme risk and prepare a robust Completion Certificate application.
We are currently supporting more than twenty Higher-Risk Building projects through the Building Safety Regulator’s building control process, working collaboratively with clients, consultants, and design teams from early planning through construction and completion.
Whether you’re at feasibility, design development, or preparing for Gateway submission, our specialists can help you understand how Gateway 3 requirements could influence your programme, outline the process and identify the information you’ll need before construction begins.
