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Planning applications

We provide local planning authorities with an assessment of the likely impact of planning proposals on:

  • scheduled monuments and their settings
  • registered historic parks and gardens and their settings
  • registered historic landscapes
  • World Heritage Sites.

  We do not provide an assessment of the likely impact of planning proposals on listed buildings or conservation areas because these are considered by the local planning authority.  

Our assessments are made in light of Welsh Government’s land use planning policy and guidance contained in:

We do not always object to applications which we consider likely to have an adverse impact on the historic environment. For example, our consultation response may explain how our concerns about the impact of an application can be addressed.

When is Cadw consulted?

We do not need to be consulted on every planning application in Wales. But we must consulted in cases of:

  • development which has a direct physical impact on a scheduled monument
  • development likely to be visible from a scheduled monument and which meets one of the following criteria

a) it is within a distance of 0.5 kilometres from any point of the perimeter of a scheduled monument

b) it is within a distance of 1 kilometre from the perimeter of a scheduled monument and is 15 metres or more in height, or has an area of 0.2 hectares or more

c) it is within a distance of 2 kilometres from the perimeter of a scheduled monument and is 50 metres or more in height, or has an area of 0.5 hectares or more

d) it is within a distance of 3 kilometres from the perimeter of a scheduled monument and is 75metres or more in height, or has an area of 1 hectare or more; or

e) it is within a distance of 5 kilometres from the perimeter of a scheduled monument and is 100 metres or more in height, or has an area of 1 hectare

  • development likely to affect the site of a registered historic park or garden or its setting

development within a registered historic landscape that requires an Environmental Impact Assessment; or

  • development likely to have an impact on the outstanding universal value of a World Heritage Site.

Full details of when we should be consulted by a local planning authority are set out in Schedule 4 of the Town and Country Planning (Development Management Procedure) (Wales) (Amendment) Order 2016