World Heritage Sites and planning in England

 

World Heritage Sites are places recognised internationally as having Outstanding Universal Value – usually shortened to OUV. They can be cultural, natural or mixed properties and are inscribed on UNESCO’s World Heritage List under the 1972 World Heritage Convention.

For planning in England, World Heritage status matters considerably. The August 2026 National Planning Policy Framework treats World Heritage Sites as heritage assets of the highest significance and now contains a dedicated decision-making policy, HE8, for development affecting them.

That does not mean development is automatically prohibited. The planning exercise is to understand why the property is internationally important, which attributes convey its Outstanding Universal Value, and what effect the proposal would have on that significance. A proposal can also matter even where it lies outside the inscribed boundary, because the setting of the heritage asset and any World Heritage buffer zone may contribute to its significance and OUV.

A current example is the City Plan 2040 Tower of London hearing, where the examination has focused on whether future tall-building contours strike the right balance between protecting the Tower’s Outstanding Universal Value and accommodating City growth.

 

What makes a place a World Heritage Site?

 

The World Heritage Convention was adopted by UNESCO in 1972 and ratified by the United Kingdom in 1984. A property is only inscribed on the World Heritage List if the World Heritage Committee considers that it has Outstanding Universal Value and meets at least one of UNESCO’s criteria for inscription, together with requirements relating to matters such as integrity, authenticity where applicable, and protection and management.

World Heritage status can cover very different types of place. In England the list includes archaeological landscapes, historic cities, industrial landscapes, buildings and designed landscapes, together with a natural World Heritage property. Some properties are also serial properties made up of separate component parts, and some extend across national boundaries.

Historic England maintains a useful current list of World Heritage properties in England, with links to UNESCO records, management plans and National Heritage List entries.

 

Outstanding Universal Value is the starting point

 

OUV is not simply a description meaning that a place is very old, beautiful or important. It is the particular international value for which the property was inscribed on the World Heritage List.

Each World Heritage property has a Statement of Outstanding Universal Value. This identifies why the property meets the World Heritage criteria and provides the baseline for its protection and management. The OUV is conveyed through identifiable attributes. Depending on the property, those attributes might include buildings, archaeological remains, landscape relationships, views, urban form, industrial infrastructure, natural features or less tangible relationships and traditions.

This distinction matters in planning. A development should not be assessed by asking only whether it is close to a World Heritage Site. The more useful questions are:

• what is the property’s significance and Outstanding Universal Value?
• which attributes convey that OUV?
• does the development site or its surroundings contribute to those attributes or to the way they are experienced?
• what would actually change as a result of the proposal?
• would that change enhance, leave unaffected or harm the significance or OUV?

That approach links directly to the wider NPPF exercise explained in our guide to heritage significance and harm.

 

How are World Heritage Sites protected in England?

 

UNESCO inscription does not create a separate planning consent called “World Heritage consent”. Protection in England works through the planning system together with the other designations and legal controls which may cover all or part of the property.

A World Heritage property may therefore contain listed buildings, scheduled monuments, conservation areas, registered parks and gardens, Sites of Special Scientific Interest or other protected features. Those controls continue to apply in their own right, and a proposal can require more than one consent.

World Heritage status is also a major planning consideration in its own right. The NPPF places World Heritage Sites among the assets of the highest significance. This means the World Heritage issue should not be treated as a decorative extra in a heritage statement after the listed-building or conservation-area assessment has been completed.

Local development-plan policies are important too. The NPPF’s plan-making policy HE2 expects plans to contain any locally-specific policies needed to conserve the significance and OUV of World Heritage Sites, including contributions made by their setting and any buffer zone. Always check the current development plan as well as national policy.

 

What does the August 2026 NPPF say?

 

The August 2026 Framework has made the national policy structure much clearer than the page numbers many older heritage statements still cite.

HE5 requires proposals affecting heritage assets to be accompanied by a proportionate assessment of significance, including any contribution made by setting, and the potential effect of the proposal. The assessment should identify whether the proposal would have a positive effect, no effect, harm, substantial harm or total loss of significance.

HE6 deals with designated heritage assets. Substantial weight is to be given to conservation and the more important the asset, the greater that weight. Any harm is a matter of considerable importance and weight. Where substantial harm or total loss is proposed, the policy test is deliberately demanding; for assets of the highest significance, expressly including World Heritage Sites, such harm or loss should be wholly exceptional.

HE8 then deals specifically with World Heritage Sites. Development proposals affecting a World Heritage Site should:

• pay particular regard to its significance and Outstanding Universal Value, including any contribution made by its setting and any buffer zone
• retain and conserve buildings and other features that make a positive contribution where possible
• have regard to the World Heritage Site management plan
• be supported by an assessment of impact, including potential cumulative impact, on the significance and attributes of OUV

The NPPF also recognises that not every building, piece of land or feature inside a World Heritage Site necessarily contributes positively to OUV. That is important: designation does not remove the need for a properly reasoned assessment of the particular element affected.

 

The site boundary, buffer zone and setting are different things

 

These three concepts are often blurred together, but they should not be.

The World Heritage property boundary defines the property actually inscribed on UNESCO’s World Heritage List. For a serial property there can be several separate component parts.

A buffer zone, where one exists, is an area around or adjoining the inscribed property intended to provide an additional layer of protection. Not every World Heritage property necessarily has a buffer zone. A buffer zone is formally associated with the World Heritage inscription, and its protection in England is principally delivered through planning policy and the wider protection and management system.

Setting is broader and more flexible. It is the surroundings in which the heritage asset is experienced. The extent of setting is not fixed and can change as the asset and its surroundings evolve. A buffer zone may cover part of a property’s setting, but it does not necessarily define the whole of the setting.

That means a development outside both the World Heritage boundary and its buffer zone can still affect the property if the land forms part of a setting which contributes to its significance or OUV. Equally, simply being inside a buffer zone does not remove the need to identify the particular effect of the proposal.

See our separate guide to the setting of a heritage asset for the wider principles on views, historic relationships, non-visual effects and the absence of any fixed-distance rule.

 

What should accompany a planning application?

 

The level of information should be proportionate to the proposal and to the significance potentially affected. For a World Heritage Site, however, a generic paragraph saying that the site is “near a WHS” will rarely be enough where a genuine effect is possible.

A robust assessment will normally start with the property’s Statement of Outstanding Universal Value and current management plan, then identify the attributes of OUV which could realistically be affected. Depending on the proposal, useful evidence can include:

• the World Heritage property and buffer-zone mapping
• the Statement of Outstanding Universal Value and relevant attributes
• the current World Heritage Site management plan
• a proportionate assessment of wider heritage significance
• verified or representative views and a visual impact assessment where views matter
• archaeological, historical, townscape, landscape or natural-environment evidence as relevant
• an assessment of cumulative effects alongside other committed or foreseeable change
• reasonable alternatives and design changes used to avoid or minimise harm
• opportunities to conserve, enhance or better reveal significance and OUV

The information may sit within a heritage statement, environmental statement or a dedicated World Heritage impact assessment depending on the scale and nature of the development. HE8 requires the assessment; it does not mean that every minor application must carry a document with the title “Heritage Impact Assessment”.

For significant proposals, UNESCO, ICCROM, ICOMOS and IUCN’s Guidance and Toolkit for Impact Assessments in a World Heritage Context provides a useful methodology for assessing effects on OUV.

 

The World Heritage Site management plan matters

 

World Heritage properties are expected to have an appropriate management plan or documented management system. In England, management plans are material considerations in the planning process. Their weight will depend on matters including their status, age and relevance to the proposal.

A management plan can be particularly useful because it usually translates the high-level Statement of OUV into site-specific attributes, vulnerabilities, important views, management objectives and actions. It may also explain how the buffer zone and wider setting contribute to OUV.

Do not assume the management plan replaces the local plan. The development plan remains the statutory starting point for a planning application, while the management plan and national policy provide important material context.

 

Can permitted development rights be used?

 

World Heritage designation does not remove every permitted development right. However, a World Heritage Site is included within Article 2(3) land in Schedule 1 to the General Permitted Development Order. Many individual permitted development classes contain additional limitations, exclusions or prior-approval requirements on Article 2(3) land or World Heritage Sites.

The answer therefore depends on the particular class being relied upon. Check the actual GPDO class rather than assuming either that all permitted development is available or that it is all prohibited. Our permitted development comparison table is a useful starting point for changes of use.

An Article 4 direction may also remove particular permitted development rights in a defined area, so the local position should be checked before works begin.

 

World Heritage Sites and Environmental Impact Assessment

 

The old version of this page was broadly right to flag EIA, but the legal position deserves more precision.

Under regulation 2 of the Town and Country Planning (Environmental Impact Assessment) Regulations 2017, a property appearing on UNESCO’s World Heritage List is a sensitive area.

For a development of a description listed in Schedule 2, the usual size or other threshold in column 2 does not have to be exceeded where any part of that development is to be carried out in a sensitive area. That brings the proposal within the Schedule 2 screening regime. It does not mean that every proposal in a World Heritage Site automatically requires an Environmental Impact Assessment. The question is still whether the Schedule 2 development is likely to have significant effects on the environment by virtue of factors such as its nature, size or location.

There is another useful distinction here. Land merely within the setting of a World Heritage Site is not, for that reason alone, defined as a sensitive area by regulation 2. But if a proposal outside the World Heritage property is otherwise Schedule 2 development, its potential effect on the World Heritage Site can still be an important part of screening for likely significant environmental effects.

 

Finding the boundary and the right World Heritage documents

 

For planning work, do not rely only on a generic map pin or the name of the World Heritage property. Establish the actual inscribed boundary, any buffer zone, the Statement of Outstanding Universal Value and the current management plan.

Historic England’s World Heritage Properties in England page is particularly useful because it brings together the relevant National Heritage List record, UNESCO page and management-plan links for each English property.

For a live planning application, also check the local authority’s development plan and policies map. Local World Heritage policies, identified views, buffer zones and management-plan requirements may be more detailed than the national policy.

 

Relevant policy and guidance

 

• National Planning Policy Framework, August 2026 – especially HE2, HE4, HE5, HE6 and HE8
• Historic England: Protection and Management of World Heritage Sites
• Historic England: World Heritage property boundaries, buffer zones and setting
• Historic England: Guidance on World Heritage Property Management Plans
• UNESCO and Advisory Bodies: Guidance and Toolkit for Impact Assessments in a World Heritage Context
• Town and Country Planning (Environmental Impact Assessment) Regulations 2017
• Town and Country Planning (General Permitted Development) (England) Order 2015, including Schedule 1 Article 2(3) land and the individual permitted development classes

 

Conservation, Heritage & Protected Sites

 

World Heritage Sites Page Updated: 20th August 2026