Construction (Design & Management) Regulations (CDM 2015) for Builders

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The Construction (Design & Management) Regulations (CDM 2015) are the main set of regulations for managing the health, safety and welfare of construction projects. They came into force on 6th April 2015.

The regulations apply to all building and construction work, (domestic and commercial), including:

  • new build
  • conversions
  • extensions
  • refurbishment
  • demolition
  • maintenance and repair.

So, what is your role and what do you need to know in order to comply?

The Client

The client is an organisation or individual having a construction project carried out in connection with a business. The client has responsibility to make suitable arrangements for managing a project. 

This includes making sure that:

  • other duty holders are appointed
  • sufficient time and resources are allocated
  • relevant information is prepared and provided to other duty holders
  • the principal designer and principal contractor carry out their duties
  • welfare facilities are provided.

The Domestic Client

The domestic client has building work carried out that is not connected to running a business - typically on the property where they or their family lives. The domestic client is included in the new regulations, but their duties as a client are normally transferred to:

  • the contractor on a single contractor project, or
  • the principal contractor on a project involving more than one contractor.

The domestic client can choose to have a written agreement with the principal designer to carry out the client duties. 

The Designer

The designer is someone who, as part of a business, prepares or modifies designs for a building, product or system relating to construction work.

The designer’s role is to eliminate, reduce or control conceivable risks that could happen, during construction or maintenance, as well as use of a building after it’s been built. 

The designer also provides information to other members of the project team to help them fulfil their duties.

The Principal Designer

The principal designer is appointed by the client for projects with more than one contractor. This can be an organisation or an individual with sufficient ability, knowledge and experience to carry out the role.

The principal designer is responsible for planning, managing, monitoring and coordinating health and safety in the pre-construction phase of a project.

Responsibilities include:

  • identifying, eliminating or controlling foreseeable risks
  • ensuring designers carry out their duties
  • preparing and providing relevant information to other duty holders.

The principal designer also liaises with the principal contractor to help in the planning, management and monitoring of health and safety in the construction phase.

The Contractor

The contractor is the individual or organisation doing the actual construction work. This can be a sole trader, self-employed worker, individual or business carrying out, managing or controlling work in the construction industry. 

Anyone who directly engages construction workers or manages construction work is a contractor. Duties apply to all workers whether they are employees, self-employed or agency staff.

The contractor’s duties are to:

  • plan, manage and monitor construction work under their control, to ensure it is carried out without risks to health and safety
  • coordinate their activities with others in the project team (for projects with more than one contractor), and comply with directions given to them by the principal designer or principal contractor
  • prepare a construction phase plan (for single contractor projects).

The Principal Contractor

The principal contractor is appointed by the client to plan, manage, monitor and coordinate health and safety, during the construction phase, when there’s more than one contractor involved.

The principal contractor’s duties are to: 

  • plan, manage, monitor and coordinate health and safety in the construction phase of a project
  • liaise with the client and principal designer
  • prepare the construction phase plan
  • organise cooperation between contractors and coordinate their work.

They must ensure that:

  • suitable site inductions are provided
  • reasonable steps are taken to prevent unauthorised access
  • workers are consulted and engaged in health and safety matters
  • welfare facilities are provided.

The Worker

The worker is an individual working for, or under the control of, contractors on a construction site. They have their own duties as well as their employers.

Workers must:

  • be consulted about matters which affect their health, safety and welfare, take care of their own health and safety, and of those who may be affected by their actions
  • report anything they see which is likely to endanger either their own or others’ health and safety 
  • cooperate with their employer, co-workers, contractors, and other duty holders.

Multiple Roles

Organisations or individuals can undertake more than one duty holder role – as long as they have the skills, knowledge and experience necessary to fulfil those roles in a way that ensures health and safety.

For more information, including downloadable guides, go to (Sources: CITB,

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Thanks for great information about construction site like contract, Designer etc. Keep sharing more article like this.

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