What are the duties for designers and the principal designer?
The regime addresses further duties on designers (any person including a client, contractor or other person who in the course of a business carries out any design work, or arranges for, or instructs, any person under their control to do so) and contractors (any person including a client, but not a domestic client, who carries out, manages or controls any building work).
As with CDM, designers must not start work unless satisfied the client is aware of their duties for the building work to which the design relates under all relevant requirements. It is therefore important to understand the provisions for all building work for which you may be appointed to best inform your client.
The designer’s duties (and general duties) will always apply, but where you are also likely to be the lead designer or a sole designer for building work (we do not include infrastructure works for this purpose, as the lead will likely be an engineer), you may have further duties as we explore below.
Where there is more than one contractor, or it is reasonably foreseeable that more than one contractor will be working on a project, the client must appoint in writing (a) a designer with control over the design work as the principal designer for the purposes of these regulations, and (b) a contractor with control over the building work as the principal contractor for the purposes of these regulations. These roles are also referred to as the principal dutyholders.
A principal designer must be appointed in writing before the construction phase begins, or before submitting an application for building control approval for a higher-risk building.
For domestic clients, the client duties will be carried out by the contractor (where there is only one contractor for the project), the principal contractor or principal designer (where the principal designer agrees to fulfil those duties with the client, agreed in writing). If a domestic client fails to make the appointments the designer in control of the design phase of the project (most likely an architect) is the principal designer, as under CDM.
Organisations may also act as principal designer subject to necessary organisational capability, meaning possessing a robust management system and a team of staff members with relevant competence.
Where you are taking over from another principal designer, you will require due diligence to ensure duties to that point have been discharged in accordance with requirements, to satisfy yourself (or your organisation) that the building design and building works (as applies at appointment) are compliant.