Do I need a principal designer for a house extension?
AI Overview
Yes, you need a Principal Designer for a house extension if it involves more than one contractor, which is common in these projects. If you don't appoint one, the role defaults to the designer in charge of the design phase, or the principal contractor if there's no designer.
Key points to know
More than one contractor: The main trigger for needing a Principal Designer is when there is more than one contractor (or subcontractor) on the job.
Client's responsibility: It is the client's legal duty to appoint a Principal Designer in writing for projects with multiple contractors.
Default roles: If you do not appoint a Principal Designer, the legal duty falls to the designer who is in control of the design phase. If there is no designer, it falls to the principal contractor.
For domestic clients: While domestic clients have different duties under the regulations, they must still appoint a Principal Designer or a Principal Contractor for projects with multiple contractors.
What they do: A Principal Designer is responsible for managing the health and safety aspects of the design and ensuring it complies with the latest building standards.
What to do
If you have multiple contractors working on your extension (e.g., a builder and an electrician), you must appoint a Principal Designer.
If you have an architect or architectural designer working on your project, they are the most logical person to appoint as the Principal Designer.
Ensure the person or company you appoint has the necessary skills, knowledge, and experience for the role, which should be proportionate to the project's complexity.