Building Safety (Wales) Act 2026 Explained

The Building Safety Act 2022 transformed building safety regulation in England following the Grenfell Tower tragedy; however, Wales has now taken a different approach.

The Building Safety (Wales) Act 2026 introduces a wider-ranging building safety regime that extends regulatory oversight beyond the highest-risk buildings and introduces new duties across a much larger proportion of Wales’s residential building stock.

For building owners, landlords, housing providers, and managing agents, understanding these differences will be critical. For many organisations, compliance will require the development of robust building safety management systems and, for Category 1 buildings, the production of a safety case report.

Looking for expert insights into what to include in your safety case report? Tune in to our recent Pennington Choices podcast episode, 'Your Building Safety Case Report Questions Answered', to find out everything you need to know. 

Wales regulates three building categories instead of one 

One of the most significant differences in the scope of buildings covered is:

In England, under the Building Safety Act 2022, the occupation regime primarily applies to Higher-Risk Buildings, which are generally buildings at least 18 metres tall or 7 stories and above with at least two residential units.

Wales introduces a three-tiered system:

Category 1: The building is at least 18 metres high or 7 storeys and has a minimum of two residential units.

Category 2: The building is between 11 and 18 metres or 5 or 6 storeys with a minimum of two residential units.

Category 3: The building is under 11 metres and fewer than 5 storeys with a minimum of two residential units.

What this means is that thousands more buildings will fall under formal building safety duties in Wales compared to England.

Structural safety duties extend beyond tall buildings

In England, the strongest regulatory focus is on Higher-Risk Buildings. However, in Wales:

• Category 1 buildings must assess and manage fire and structural safety risks.
• Category 2 buildings must also assess and manage fire and structural safety risks.
• Category 3 buildings and relevant HMOs must assess and manage fire safety risks.

This represents a substantial expansion of statutory duties across medium-rise residential buildings.

Safety case reports become a key compliance requirement 

The safety case report is already a familiar concept in England’s Higher-Risk building regime. Under the Welsh legislation, Category 1 buildings will require a safety case report demonstrating:

• Fire risks have been assessed.
• Structural risks have been assessed.
• Reasonable steps have been taken to prevent incidents.
• Measures are in place to minimise consequences should an incident occur.
• Risk assessments.
• Building safety management arrangements.
• Fire safety strategies.
• Structural risk controls.
• Resident engagement processes/strategies.
• Ongoing monitoring and review systems.

The report must form part of the Building Certificate application process.

This means Accountable Persons will need clear evidence of:

• Risk assessments.
• Building safety management arrangements.
• Fire safety strategies.
• Structural risk controls.
• Resident engagement processes/strategies.
• Ongoing monitoring and review systems.

Registration requirements extend to Category 2 buildings 

In Wales, Principal Accountable Persons (PAPs) must register both Category 1 and Category 2 buildings with the Building Safety Authority. Failure to register an occupied building is an offence. The PAP must also confirm the accuracy of information held on the register every five years.

This creates additional compliance obligations for organisations that may not currently be captured by England’s Higher-risk building regime.

The "Golden Thread" continues 

Wales has adopted the principle of the “golden thread” of information. The legislation requires key building information relating to:

• Design.
• Construction.
• Ongoing management.

All of which will need to be maintained and accessible throughout the building's lifecycle. While detailed requirements are still being developed through regulations, organisations should already be considering how building information is stored, maintained, and reviewed.

Residents will sit at the heart of the Welsh regime 

Similar to England, resident engagement forms a central part of the framework. For Category 1 buildings, duty holders will be required to:

• Prepare and maintain a Resident Engagement Strategy.
• Operate a complaints system.
• Provide information to residents.
• Fire safety.
• Structural safety.
• Access for inspections or repairs.

The Welsh Act also places direct responsibilities on residents regarding:

• Fire safety.
• Structural safety.
• Access for inspections or repairs.

Enforcement powers will be available where residents fail to comply.

The new Building Safety Authorities in Wales

Wales will establish dedicated Building Safety Authorities, designated by Welsh Ministers across fire and rescue authority areas.

The Building Safety Authority will oversee:

• Registration.
• Structural safety compliance.
• Building certificates.
• Safety case reports.
• Occurrence reporting.
• Resident complaints.

Fire Safety Authorities will separately regulate and enforce fire safety duties.

Current timelines

Welsh Government has indicated that implementation will be phased, although timings remain subject to secondary legislation, guidance, and formal commencement orders.

• Category 1 registration by December 2027.
• Category 1 duties commencing June 2028.
• Category 2 registration by December 2028.
• Category 2 duties commencing August 2029.
• Category 3 duties commencing August 2029.

Your next steps 

You should start to:

• Identify all buildings within your housing stock and whether they fall into any of the three categories.
• Confirm who the Accountable Person and Principal Accountable Person will be.
• Review your fire and structural risk management arrangements.
• Establish a golden thread of information system.
• Develop resident engagement processes.
• Prepare yourselves for safety case report production.

The Building Safety (Wales) Act 2026 does much more than replicate England's Building Safety Act 2022. It expands regulatory oversight to a far wider range of residential buildings and places greater emphasis on proactive management of both fire and structural safety risks.

For responsible persons, landlords, housing associations, and managing agents, the question is no longer whether building safety compliance will affect them, but how prepared they are to demonstrate compliance when the new regime comes into force.

For Category 1 buildings in particular, the safety case report will become one of the most important pieces of evidence demonstrating that building safety risks are understood, controlled, and continuously managed.

Most Welsh residential buildings that were outside the English higher-risk building regime will now face formal building safety duties.

At Pennington Choices, we help duty holders identify their obligations, build compliance frameworks, and produce safety case reports that withstand regulatory scrutiny. If you are looking for support with any of your building safety needs, we will ensure you are ahead of the curve when registration closes. Reach out to get in touch with our team of building safety experts.