How to Write a Heritage Statement for Planning: A Homeowner's Guide

Introduction

A heritage statement is a document required by local planning authorities when a planning application affects a heritage asset — a listed building, a building within a conservation area, a scheduled monument, a registered park or garden, or a non-designated heritage asset of local importance. In north London, where conservation areas and listed buildings are numerous, heritage statements are required for a large proportion of residential planning applications.

This guide explains what a heritage statement must contain, how it is assessed, who should write it, and the common mistakes that lead to applications being refused or delayed.

When Is a Heritage Statement Required?

A heritage statement is required when a planning application involves:

• Works to a listed building (any grade) — a heritage statement is required for both the planning application and the listed building consent application
• Works to a building or structure within a conservation area, whether or not that specific building is listed
• Works that would affect the setting of a listed building, scheduled monument or registered park, even if the works are some distance from the asset
• Works affecting a non-designated heritage asset — a building or site identified as locally important in the local authority's evidence base, even if not formally listed
• Works in the curtilage of a listed building (gardens, outbuildings, boundary walls) — all of which may be covered by the listing

Local planning authorities may also request heritage statements for works in sensitive areas that do not technically fall within the above categories, particularly where the development proposal raises heritage concerns.

What Must a Heritage Statement Contain?

Historic England's guidance (notably the National Planning Policy Framework and the accompanying Planning Practice Guidance) sets out what information a heritage statement should provide. Most well-prepared heritage statements include the following sections:

1. Description of the Heritage Asset

A clear description of the heritage asset affected — its history, original construction, subsequent alterations, current condition and relationship to its setting. For a listed building, this should draw on the Historic England listing description and any available historical research, photographs and drawings.

2. Assessment of Significance

An evaluation of the significance of the heritage asset under the four dimensions set out in Historic England guidance:

• Architectural interest: The design quality, craftsmanship and typological importance of the building
• Historic interest: The associations of the building with historical persons, events or periods
• Evidential value: The potential of the building to yield information about the past
• Communal value: The meaning the building holds for communities, including social, cultural and spiritual associations

3. Description of the Proposed Works

A clear, non-technical description of what is proposed — what will be added, changed or removed — with cross-references to the application drawings.

4. Assessment of Impact on Significance

An honest assessment of how the proposed works will affect the significance of the heritage asset. This should consider both the direct impact (physical alteration) and any indirect impact (on the setting or character of the asset). The impact should be characterised as:

• No impact / neutral impact
• Harm — and if so, whether it is less-than-substantial or substantial harm in NPPF terms
• Enhancement of significance

5. Justification

Where the assessment identifies harm to significance, the statement must explain why the works are proposed notwithstanding this harm, and set out the public benefits or other justification that outweigh the harm. In many residential cases, the justification is the functional need (additional space, improved energy performance, adaptation for disability) that cannot be met without some degree of impact on historic fabric.

6. Policy Compliance

A brief section demonstrating how the proposal complies with (or cannot comply with, with explanation) the relevant heritage policies in the NPPF, the London Plan and the local authority's planning documents.

Who Should Write a Heritage Statement?

Heritage statements should be written by a person with appropriate knowledge and skills. For residential applications, this is typically:

• The project architect, where they have relevant conservation and heritage expertise
• A heritage consultant — a specialist with training in architectural history, building conservation or archaeology (typically IHBC membership or similar qualification)
• A planning consultant with heritage specialism

A poorly researched or superficial heritage statement will be identified by conservation officers and may result in the application being refused or additional information being requested, causing significant delay.

Common Mistakes in Heritage Statements

• Generic statements: Copy-and-paste text that does not engage with the specific significance of the individual building
• Incomplete significance assessment: Failing to address all four dimensions of significance, particularly evidential and communal values
• Failure to assess setting: Not considering how the proposed works affect the setting of the asset, particularly where the asset is visible in the wider landscape
• Inadequate impact assessment: Failing to identify all the ways in which the proposals affect significance — including cumulative impacts of past alterations
• Unsubstantiated mitigation: Claiming that impacts will be mitigated by measures (reversibility, recording, materials matching) without credible technical justification

Conservation Area Appraisals and Management Plans

Local planning authorities publish conservation area character appraisals for each conservation area. These documents set out the character and significance of the area and inform what types of development are or are not acceptable. The heritage statement for a conservation area application must engage closely with the relevant character appraisal.

Conclusion

A well-prepared heritage statement is essential for any planning or listed building consent application in a conservation area or affecting a listed building. It demonstrates to planning officers and conservation specialists that the applicant understands the significance of the asset and has genuinely considered the impact of their proposals. Working with an architect or heritage consultant who has specific experience in the relevant conservation area and with the local planning authority will maximise the chances of a successful outcome.