Last edited 27 Feb 2017



[edit] Introduction

Demolition is the most high risk activity in the construction sector.

The essence of safe demolition lies in efficient risk control, environmental management and careful planning. The CDM Regulations have provided a platform from which the industry exhibits best practice, demanding written plans of work for demolition even where a project is not notifiable.

Clients and their professional advisors play a vital role in safe demolition and must:

  • Allow sufficient time for planning the works.
  • Procure an appropriate contractor (carry out safety and environmental audits).
  • Provide sufficient information to a good standard.

The level and detail of pre-demolition information and surveys required are proportionate to the project and include:

General demolition procedures include:

Demolition methods include:

  • Explosives. This requires extensive use of the police to enforce exclusion zones as well as pre and post demolition structural inspections for a substantial radius (in the order of quarter or half a mile). Recent developments in high-reach machinery mean that buildings less than 22 storeys are generally demolished by machine.
  • Hand demolition. These methods are required when demolition has to be carried out in a more sensitive manner due to site constraints such as; proximity to uncapped mineshafts, overhead utilities, pedestrian access or adjacent structures, or structural instability.
  • Machine demolition. This is by far the most frequently used method and reduces the need for people to work at height, for manual handling and is an effective risk control for the demolition industry.

Buildings handed over for demolition generally contain hazardous waste, rubbish for landfill and recyclable material. Best practice use of site waste management plans for all demolition projects assists in ensuring the optimum recycling chains are in place. Clients can assist by handing over empty buildings and finding new uses for all furniture and equipment in a building before handing it to the contractor for demolition.

Demolition produces products suitable for construction with the general rule that a recycled material can be considered a grade lower than its original state. So crushed structural concrete for example may be used as blinding, though with full treatment and a designed mix, it may be possible to achieve structural grade concrete. At present, it is practical for a competent contractor to achieve 95% building recycling by mass, or even more for some structures.

Materials should be provided to WRAP protocols with Environment Agency certification. It is practical to crush on site for volumes in excess of 3000 cubic metres.

NB, whilst it is not normally necessary to obtain planning permission to demolish a building (unless there are local restrictions such as an article 4 direction), permission is required for listed buildings and for buildings in conservation areas.

[edit] Policy

The Coalition Agreement outlined the government’s commitment to increase housing supply, tackle the problems that rundown vacant properties cause and help support local economic growth from refurbishment and improvements. In a written ministerial statement of 10 May 2013, Official Report, Column 13WS, ministers committed to revising outdated guidance issued by the former Office of the Deputy Prime Minister in relation to demolition.

On 16 January 2015, The Rt Hon Eric Pickles MP, Secretary of State for Communities and Local Government, confirmed that the following pieces of guidance no longer reflect government policy and so were cancelled:

  • Neighbourhood Renewal Assessment and Renewal Areas (DETR, 1997).
  • Private Sector Renewal Strategies: A Good Practice Guide (DETR, 1997).
  • Running and Sustaining Renewal Areas (DETR, 2000).
  • Addressing the Needs of Run Down Private Sector Housing (ODPM, 2002).
  • What Works? Reviewing the Evidence Base for Neighbourhood Renewal (ODPM, 2002).
  • Housing Renewal Guidance – ODPM Circular 05/2003.
  • Sustainable Communities: Building for the Future (ODPM, 2003).
  • Assessing the Impacts of Spatial Interventions: Regeneration, Renewal and Regional Development - The 3Rs Guidance (ODPM, 2004).
  • Neighbourhood Renewal Assessment guidance manual (ODPM, 2004).

Ref DCLG, Statement on the planning decision on Welsh Streets in Liverpool and the revocation of outdated guidance on demolition. 16 January 2015.

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