Construction Design & Management (CDM 2015)


CDM 2015 governs the way construction projects of all sizes and types are planned that aim to improve the overall health, safety and welfare of those working in construction. The regulations offer a very broad definition of what construction works are, but whatever your role in construction is, CDM aims to improve health & safety in the industry. 


Key elements to securing construction health & safety include:


Managing risks by applying general principles of prevention

Appointing the right people and organisations at the right time

Making sure duty-holders cooperate & communicate with each other & coordinate their work


Make sure everyone has the information, instruction, training and supervision they need to carry out their jobs in a way that secures health & safety; and consult workers and engage with them to promote and develop effective measures to secure health, safety and welfare. Organisations or individuals can carry out the role of more than one duty-holder, provided they have the skills, knowledge, experience and organisational capabilities necessary to carry out those roles in a way that secures health & safety. Other health & safety regulations also apply to construction.


CDM Principal Designer

Principal designers are designers appointed by the client in projects involving more than one contractor.  They can be an organisation or an individual with sufficient knowledge, experience and ability to carry out the role.  They must plan, manage, monitor and coordinate health & safety in the pre-construction phase of a project. This includes identifying, eliminating or controlling foreseeable risks and ensuring designers carry out their duties.  They must also prepare and provide relevant information to other duty-holders; and provide relevant information to the principal contractor to help them plan, manage, monitor and coordinate health & safety in the construction phase.

F10 Notification

A project is notifiable to the Health & Safety Executive (HSE) if construction work onsite is scheduled to last longer than 30 working days AND have more than 20 workers working simultaneously at any point in the project; or exceed 500-person days. 


Requirements of CDM 2015 apply whether or not the project is notifiable.