Gateway 3: Essential Guide to Building Safety Act Compliance

October 2023 marked a major shift in how buildings in the UK are signed off and occupied. If you’re delivering higher-risk buildings (HRBs), you’ll already know the landscape has changed, and Gateway 3 is now the final gate you need to pass before anyone can move in.

But let’s be clear: Gateway 3 of the Building Safety Act isn’t a formality. It’s a full regulatory checkpoint. We’ve already seen the consequences of not passing – projects not getting their completion certificate even when they’re practically finished, simply because documentation wasn’t ready, systems weren’t in place, or the Regulator wasn’t satisfied.

The most frustrating thing for any project team is a stumble at this critical point of the job, when most of the hard work is done!

What is Gateway 3?

Gateway 3, part of the Building Safety Act 2022, is the regulatory checkpoint at the end of the construction phase, just before occupation. It applies specifically to higher-risk buildings (HRBs),  typically residential buildings over 18 metres or more than seven storeys, with at least two residential units.

Before Gateway 3 approval, the Building Safety Regulator must be satisfied that:

• The project has followed approved plans,
• All building work meets safety standards,
• A building regulations compliance statement is in place,
• A complete golden thread of information is documented,
• A compliant fire and emergency file, fire statement, and construction control plan have been submitted.

You’re not just proving what you’ve built, you’re proving how and why you built it the way you did.

Why Gateway 3 Isn’t Optional

Under the Building Safety Act, building owners cannot occupy or allow residents to move in until the BSR (Building Safety Regulator) issues a completion certificate.

This means any issues you’ve left unresolved during construction? They’re now blockers to occupation. Any documentation you’ve held off on? You’ll be scrambling to catch up, while your programme slips and your client fumes.

This gateway is non-negotiable. The message from the Regulator is clear: no shortcuts, no self-certification, no occupation until everything’s watertight.

How to Pass Gateway 3 Without a Panic

To ensure compliance, treat Gateway 3 like a project in its own right — with planning, evidence, and consistency from day one.

Here’s what we recommend:

1. Build your golden thread early

   Capture and store everything as you go — from QA records to product data to regulation compliance documentation. A live, accessible golden thread of information means you’re not looking for old files later once everyone has gone home.

2. Use technology that tracks the actual build

   Digital tools like Visibuild don’t just store files — they document the reality of what’s happening on site. That means handover information is complete, accurate, and easy to share with the Regulator.

3. Don’t leave it to the end

   The most common mistake we see? Treating Gateway 3 like a formality. It’s not. The Regulator expects to see a consistent thread of compliance throughout — from design and construction through to sign-off. Avoid the project after the project.

Key Documentation Requirements

To pass the Building Safety Act gateway 3, you’ll need to submit comprehensive documentation, including:

1. Building Regulations Compliance Statement

   This statement demonstrates that your building complies with all relevant building regulations, outlining how design and construction meet the legal requirements for safety, sustainability, accessibility, and energy efficiency. The statement proves to the Regulator that the project aligns with applicable regulations, which is crucial for obtaining a completion certificate.

2. Fire and Emergency File and Fire Statement

   The fire and emergency file includes vital information about fire safety and emergency procedures in the building, including materials used, fire safety systems, evacuation routes, and fire-resistant construction elements. The fire statement confirms that fire safety provisions meet regulations. Both are essential to ensuring the building is safe for occupancy.

3. Construction Control Plan

   This plan outlines the procedures and controls in place to manage the construction process, ensuring safety and quality throughout. It includes details on monitoring construction, managing risks, and maintaining compliance with safety standards.

4. Clear and Complete Golden Thread of Information

   The golden thread is an accessible, comprehensive record of all safety and compliance information related to the project. It includes design decisions, changes during construction, and documentation proving compliance. It ensures transparency and accountability, vital for future safety issues.

5. Any Other Relevant Approved Plans and Evidence of Compliance with Safety Standards

   This includes architectural, engineering, or structural plans, and supporting documentation that shows compliance with safety standards (e.g., structural integrity, ventilation, accessibility). These documents help demonstrate that the project adheres to required safety standards.

Common Pitfalls We’re Seeing Post-October 2023

Since the new Safety Act Gateways kicked in, one serious problem we’re seeing is projects failing to get a completion certificate, despite work being “done” on site.

Here’s where things are going wrong:

• The golden thread of information isn’t fully in place or accessible
• The fire and emergency fileis incomplete or doesn’t match the build
• The building regulations compliance statement is missing or lacks the necessary detail
• Changes during construction aren’t reflected in the final documentation
• Failure to report under mandatory occurrence reporting (MOR)
• Poorly justified partial completion strategies

The result? Weeks (sometimes months) of delays while teams scramble to backfill the evidence. During this time, no one can move in, and no revenue comes in. It’s a tough way to end a project.

The Payoff: Why Gateway 3 Is Worth Getting Right

Yes, BSA Gateway 3 is stricter than anything the industry’s seen before. But there’s a silver lining: it rewards the teams who are proactive, collaborative, and digitally mature.

If you’ve got a handle on compliance and data, you can:

• Avoid handover delays
• Prevent rework and retrofits
• Boost confidence with clients, residents, and regulators
• Prove quality and compliance without hesitation

At Visibuild, we help teams do exactly that — no fluff, no paper-chasing, just smart, auditable evidence of a job done right.

Final Word

Gateway 3 is where your entire project gets tested, and too many teams have learned the hard way that it’s not just a box to tick.

If you don’t have the golden thread of information, if your fire statement or compliance documentation is weak, or if you’re scrambling post-handover, you might not get that completion certificate — and that means no occupation.

The good news? It doesn’t have to be that way. The earlier you start thinking about Gateway 3, the smoother it’ll be. Tools like Visibuild are designed to keep you ahead, not playing catch-up.

If you’re unsure whether your current QA or compliance process will stand up to Regulator scrutiny, let’s talk.