All insights
Building Safety Act
What is the Building Safety Act?
Everything you need to know
The Building Safety Act 2022 coming into force on the 1st July 2026 is the most significant reform of building regulations in a generation. If you are planning a new build, extension, renovation, or development project in Wales, you need to prepare for important changes to the Building Regulations coming into effect on 1 July 2026.
These updates are part of the Welsh Government’s Building Safety Programme and the Building Safety Act 2022. They introduce new requirements for dutyholders and competence declarations that will affect every project submitted from that date. Here's what's changed and what it means for you.

Image by Adrian Williamson - Building Safety Act, commencing 1st July 2026
New duties and roles
The Act introduces clearly defined duty holders - the people legally responsible for safety throughout design and construction:
- Clients must ensure the right competent people are appointed and that safety is embedded from day one
- Principal Designers must manage safety risks through the design process
- Principal Contractors must ensure safe construction and maintain a detailed record (the "golden thread" of information)
- Accountable Persons take responsibility for safety in occupied HRBs
Ignorance is no longer a defence. Duty holders face serious legal consequences for non-compliance.
New competence declarations for key duty holders
New Competence Declarations for key duty holders One of the most significant changes is the introduction of new competence declarations. These declarations must be completed and signed by the following duty holders before a Final Certificate can be issued:
- The Client or Homeowner
- The Principal Designer
- The Principal Contractor
These declarations confirm that each party has the necessary skills, knowledge, and experience to carry out their roles safely and competently. This step aims to improve accountability and ensure that all projects meet higher safety standards. For example, if you are a homeowner acting as the client for your renovation, you will need to sign a declaration confirming your understanding of your responsibilities. Similarly, the principal designer and contractor must declare their competence in managing design and construction safely.
New Time Limits for Project Commencement
The regulations also introduce strict time limits for starting work on projects. After an Initial Notice is accepted, the project must reach a defined "Commencement Stage" within three years. Simply beginning any work on site will no longer be enough.
The exact requirements for the Commencement Stage depend on the type of project:
- For complex buildings: foundations and lowest floor structure must be completed
- For extensions: foundations and substructure must be completed
- For material alterations: around 15% of permanent works must be completed
If these milestones are not met within the three-year window, the application may lapse. This means you would need to submit a new application, causing delays and additional costs.
What These Changes Mean for Homeowners and Developers
For homeowners and developers, these changes bring new responsibilities and require careful planning:
Homeowners acting as clients must understand their role in managing safety and competence declarations. This may require seeking professional advice to avoid mistakes. Developers and contractors need to ensure projects meet the new commencement milestones on time to avoid lapsing applications. Designers and contractors must demonstrate their competence clearly through signed declarations, increasing transparency and safety on site.
Failing to meet these requirements could lead to project delays, increased costs, and difficulties in obtaining final certification.

Image by Chloe Williams
Prepare for the New Regulations
Preparation is key to navigating these changes smoothly. Here are practical steps to take now:
- Engage professionals early: Work with architectural consultants, designers, and contractors familiar with the new regulations.
- Understand your role: If you are a homeowner client, learn what the competence declaration involves and how to fulfill your duties.
- Plan project timelines carefully: Ensure your project schedule allows reaching the required commencement stage within three years.
- Keep clear records: Document all declarations and milestones to provide evidence for final certification.
- Seek guidance: Consult experts who can help coordinate compliance and avoid lapsing applications.
What does this mean for clients?
If you're commissioning a building project, especially a higher-risk one, your responsibilities have grown significantly.

Definition of Higher-risk Buildings in Wales - Legislation.gov.uk
The bottom line?
The Building Safety Act shifts the culture from "build it and hope" to proactive, evidenced safety management at every stage. It's more process, more paperwork, and more responsibility but ultimately, safer buildings for everyone.
Useful links
Building Safety (Wales) Act 2026, Implementing the Building Safety (Wales) Act 2026
Recent posts



