The four heritage values in a significance statement

A heritage significance statement values framework has two vocabularies running through it, and conflating them is the commonest structural fault in the documents officers read. Historic England's Conservation Principles describes four heritage values: evidential, historical, aesthetic and communal. The National Planning Policy Framework instead defines significance by reference to archaeological, architectural, artistic and historic interest. A statement that works uses the values to analyse the asset and the interests to speak to the decision-maker.

Do the analysis before you look at the proposal. A statement written backwards from the scheme reads exactly like one.

Why significance is assessed before harm

The sequence is not a drafting preference. National policy requires the applicant to describe the significance of any heritage asset affected, to a level of detail proportionate to its importance and sufficient to understand the impact. That description is the baseline against which the effect of the proposal is then judged.

Reverse the order and two things go wrong. The significance discussion quietly shrinks to cover only what the scheme touches, which an experienced officer spots immediately. And the harm judgement has nothing independent to measure against, so it becomes assertion.

Proportionality cuts both ways. A Grade II* church needs a full analysis. A modest unlisted building in a conservation area needs two or three pages, and padding it out does not help.

Evidential value and what evidences it

Evidential value is the potential of a place to yield evidence about past human activity. It lives in physical fabric: buried deposits, stratigraphy, surviving structural sequences, blocked openings, tool marks, early finishes under later ones.

It is the only one of the four values that is consumed by investigation. Excavating a site, stripping plaster or cutting a new opening destroys the evidence while recovering information from it, which is why recording in advance of loss is the standard mitigation. The practical requirements of that process are set out in recording a building before demolition or conversion.

What evidences it, in a statement: documented phases with the physical evidence for each, a phasing drawing, references to the historic environment record, fabric observations made on site rather than inferred from photographs, and an honest statement of where the sequence is uncertain.

Evidential value maps most closely to archaeological interest in the Framework's terms, and it is the value most often understated in statements for standing buildings.

Historical value, illustrative and associative

Historical value is the way a place connects the present to past people, events and aspects of life. Conservation Principles divides it in two.

Illustrative value is the capacity of a place to demonstrate something about the past: a surviving bottle kiln illustrating a lost industrial process, a model farm layout illustrating nineteenth-century agricultural improvement, a terrace illustrating bye-law housing standards. It depends on legibility, so the parts that make the process or type readable carry the value.

Associative value is the connection with a notable person, family, event or movement. It depends on the authenticity of the association rather than on the survival of fabric, so a plain building can carry high associative value and a heavily restored one can keep it.

Two drafting rules. Evidence the association from documentary sources rather than from local tradition, and say which. And resist inflation, because a claim that a building is associated with a national figure on thin evidence weakens everything else in the document.

Aesthetic value, design and fortuitous

Aesthetic value covers the ways a place draws sensory and intellectual stimulation.

Design value is the product of conscious intention: composition, proportion, materials, craftsmanship, the relationship of building to landscape, planned vistas. It is assessed against the designer's intention where that is known.

Fortuitous value is what time and accident produce: patina, weathering, the accretion of additions in different periods, the picturesque quality of a farm group that nobody designed. It is the value most easily destroyed by well-meant restoration, because tidying a group removes exactly the quality that made it.

Views matter here, and so does setting. Where the setting of an asset contributes to its significance, assess it as part of the analysis rather than in a separate section bolted on at the end, and use a stepped method that identifies the asset, the contribution the setting makes, the effect of the proposal, and the means of reducing harm.

Communal value and how to evidence it

Communal value is the meaning a place holds for the people who relate to it, and Conservation Principles subdivides it into commemorative and symbolic, social and spiritual.

It is the hardest to evidence and the easiest to assert. A paragraph saying that a chapel is valued by the local community, with nothing behind it, adds no weight. What does add weight: inclusion on a local heritage list with the nomination reasoning, records of continuous use for a social function, war memorial status, documented commemorative events, parish or neighbourhood plan references, and consultation carried out for the application itself.

Where a building is still in the use that generates the value, say so plainly, because the planning consequence of removing that use is different from the consequence of altering fabric.

Communal value also cuts against the applicant more often than the others, since it is the value objectors articulate best. Dealing with it honestly in the statement is better than leaving the council to hear it only from objectors.

Grading contribution by element

The analytical step that turns a description into a usable document is grading.

Work through the asset element by element and space by space, and assign a level of contribution to significance: high, medium, low, neutral, or detracting. Then show it as a plan, coloured by level, floor by floor and elevation by elevation.

Five rules that make a significance plan useful.

1. Grade contribution to the significance of the whole, not the intrinsic interest of the element.
2. Include a detracting category, because identifying what harms the asset is what justifies change.
3. Grade spaces as well as fabric, since plan form often carries more value than joinery.
4. Grade the setting and key views on the same scale.
5. Keep the categories to five or fewer, and define each one in a sentence.

This is the part of the document a conservation officer reads first. It is also what makes the later impact assessment short, because each proposed intervention can be referenced directly to a graded element.

Carrying significance through to the harm judgement

Once significance is graded, the impact section becomes mechanical in the good sense. For each intervention, state the element affected, its graded contribution, the effect on the relevant value or interest, and whether that effect amounts to harm.

Then characterise the harm overall, because the policy tests turn on that characterisation. Substantial harm engages a demanding justification, and the way that test operates in practice is covered in substantial harm and the exceptional justification test. Less than substantial harm engages a weighted balance against public benefits, and the weight attaching to harm is a matter for the decision-maker rather than for the applicant to declare.

The statutory duties sit over all of it. The duties in the Planning (Listed Buildings and Conservation Areas) Act 1990 require special regard to the desirability of preserving a listed building, its setting and features of special interest, and special attention to the character and appearance of conservation areas. What those duties require of a decision is set out in sections 66 and 72 and what they require of decisions, and a statement that never mentions them has left the decision-maker to do the legal work.

A Heritage Statement structured as significance, grading, impact and justification, in that order, is what the system expects. Where fabric will be lost, pair it with a Historic Building Recording exercise at the level the conservation officer specifies, and expect councils to want a suitably qualified author for both. Professional review before submission is strongly advised.

To see which heritage documents your application is likely to need, enter your postcode on PlanScope and work through the guided questions.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.