What We Do

Principal Designer & CDM Consultant

 The Construction Design Management Regulations 2015 or CDM for short are the main set of regulations for managing health and safety and welfare of construction projects. CDM applies to all construction and building works.

Andrew Alder Associates Limited are able to advise and assist all duty holders to ensure they fulfil and meet their legal obligations under the regulations.

We provide services including:

Principal Designer
CDM Advisers to Principal Designer
CDM Adviser to Domestic Clients
CDM Adviser to commercial clients
CDM Adviser to Designers
CDM Adviser to Principal Contractors
CDM Adviser to Contractors
Health and Safety assessments on behalf of the Clients
CDM Audits on behalf of the Client
Construction Phase Health and Safety plans for Principal Contractors
Telephone Advice

Role of the Client

Organisations or individuals for whom a construction project is carried out. The Clients must make suitable arrangements for managing a project. This includes making sure that other duty holders are appointed, sufficient time and resources are allocated. The Client must make sure that the relevant information is prepared and provided to other duty holders that the principal designer and principal contractor carry out their duties and welfare facilities are provided during the project.

Principal Designer

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. Principal Designers must be able to plan, manage, monitor and coordinate health and safety in pre-construction phase of a project. This includes identifying, eliminating or controlling foreseeable risks, ensuring designers carry out their duties, prepare and provide relevant information to the other duty holders, provide relevant information to the principal contractor to help them plan, manage and monitor and coordinate health and safety in the construction phase.

Principal Contractors

Contractors appointed by the client to co-ordinate the construction phase of a project where it involves more than one contractor. Plan, manage, monitor and co-ordinate health and safety in the construction phase of the project. They must liaise with the client and principal designer, preparing the construction phase plan, organising co-operation between contractors and co-ordinating their work.  They must ensure that suitable site inductions are provided and reasonable steps are taken to prevent unauthorised access, workers are consulted and engaged in securing their health and safety and that welfare facilities are provided throughout the project.

Role Of the Designer

Prepare or modify designs for a building or product, or prepare or modify designs to systems relating to construction work. When preparing or modifying designs, eliminate, reduce or control foreseeable risks that may arise during construction and the maintenance and use of building once it is built. They must also must provide information to other members of the project team to help them fulfil their duties.

Pre-construction information

  1. Pre-construction information provides the health and safety information needed by:
  • Designers and Contractors, who are bidding for work on the project, or who have already been appointed, to enable them to carry out their duties.
  • Principal Designers and Principal Contractors in planning, managing, monitoring and co-ordinating the work of a project.

It also provides a basis for preparation of the construction phase plan. Some material may also be relevant to the preparation of the health and safety file.

  1. Pre-construction information is defined as information about the project that is already in the client’s possession or which is reasonably obtainable by or on behalf of the client. The information must:
  • Be relevant to the particular project
  • Have an appropriate level of detail
  • Be proportionate, given the nature of the health and safety risks involved.
    1. Pre-construction information should be gathered and added to as the design process progresses to reflect new information about the risks to health or safety and how they should be managed. Preliminary information gathered at the start of the project may not be sufficient where further design and investigation has been carried out.
    1. When Pre-construction information is complete it must include proportionate information about:
    2. The project, such as the client brief and key dates of the construction phase
    • The planning and management of the project, such as the resources and time being allocated to each stage of the project and the arrangements to ensure there is co-operation between duty holders and that the work is co-ordinated
    • the health and safety hazards of the site, including design and construction hazards and how they will be addressed.
    • Any relevant information in an existing health and safety file.
    1. The information should be in convenient form and be clear, concise and easily understandable to allow other duty holders involved in the project to carry out their duties


Plan, manage and monitor construction work under their control so that is carried out in without risk to health and safety. For projects involving more than one contractor, co-ordinate their activities with others in the project team – in particular, comply with directions given to them by the principal designer or principal contractor. In addition, for single-contractor projects, prepare a construction phase plan.


Construction Phase Plan

The construction phase plan is a document that records how health and safety will be managed for the construction phase of a project. It is the basis for communicating to all those involved in the construction phase of the project, so it should be easy to understand and as simple possible. In considering what information is included, that emphasis is that it:

  • Is relevant to the project
  • Has sufficient detail to clearly set out the arrangements, site rules and special measures needed to manage the construction phase, but
  • Is still proportionate to the scale and complexity of the project and the risks involved.

The Plan should not be cluttered with documents (such as generic risk assessments, records of how decision were reached or detailed method statements)  that get in the way of a clear understanding of what is needed to manage the construction phase.

The following list of topics should be considered when drawing up the plan.

  • A description of the project, such as key dates and details of keys members of the project team
  • The management of the work, including:
  • The health and safety aims for the project
  • The site rules
  • Arrangements to ensure co-operation between project team and members and co-ordination of their work, such as regular site meetings
  • Arrangements for involving workers
  • Site induction
  • Welfare facilities
  • Emergency producers, such as fire and first aid
  • The control of any of the specific risks relevant to the work involved.

Health & Safety File

The health and safety file is defined as a file appropriate to the characteristics of the project, containing relevant health and safety information to be taken into account during any subsequent project. This file us only required for project involving more than one contractor.

The file must contain information about the current project that is likely to be needed to ensure health and safety during in any subsequent work such as maintenance, cleaning, refurbishment or demolition. When preparing the health and safety file, information on the following should be considered for inclusion.

  • Any brief description of the work carried out
  • Any hazard that have not been eliminated through the design and construction processes, and how they have been addressed (for example. Surveys or other information concerning asbestos, contaminated land or buried services).
  • Key structural principals (for example, bracing or sources of substantial stored energy including pre-or post- tensioned members) and safe working loads for floors and roofs.
  • Hazardous materials used (for example, lead paints and special coatings).
  • Information regarding the removal or dismantling of installed plant and equipment (for example, any special arrangements for lifting such equipment).
  • Health and safety information about equipment provided for cleaning or maintaining structure.
  • The nature, location and markings of significant services, including underground cables, gas supply equipment and fire-fighting services.
  • Information and as-built drawings of the building, its plant and equipment (for example, the means of safe access to and from service voids, and the position of fire doors).

There should be enough detail to allow the likely risks to be identified and addressed by those carrying out the work and be proportionate to those risks. Information must be convenient form that is clear, concise and easily understandable.

The file should not include things that will not help when planning future construction work, such as pre-construction information, the construction phase plan, construction phase risk assessments or contractual documents.

Sectors We Work In

Restaurants and patisseries
School and Education
Health Care
Churches and Community Building
Sport and Leisure


Our Featured Work

With a diverse range of clients Andrew Alder Associates Ltd cover a variety of Clients and buildings from residential to large old institutions all have there own challenges. Here are a few of our portfolio past and current clients.

Balliol College

Christ Church


New College

Worcester College

TSH Architects

Corpus Christi

Deans Diner

Blue Cross


Gregori Chiarotti Projects

Miu Miu

Dolce & Gabbana


Home Builders

We are at The National Self Build & Renovation Centre

If you're a self-builder we can help and support you with health & Safety and the CDM regulations and legislation.

The Construction (Design & Management) Regulations 2015 are the main set of regulations for managing Health and safety on all construction projects, including self builds. 

As a client you are required by law to comply with these regulations. 

Do I need a Principal designer for my project?


As Principal Designer, we assist you and your builders to fulfil your legal duties. We provide specific:

  • Help and support on Health and Safety and CDM Regulations and Legislation
  • Health and Safety Training / Certificates
  • Health and Safety documentation including risk assessments, construction phase health and safety plan, method statements etc. for the self-build 
  • Health and Safety Audit reports at all stages

For all persons involved in your self-build project to ensure compliance with all current regulations and legislation.

Request a Quote

If you would like to request a quote click the button alternatively give us a call on 01235 763742.