Section 72 duty in a conservation area application

Section 72(1) of the Planning (Listed Buildings and Conservation Areas) Act 1990 requires that, in the exercise of planning functions with respect to any buildings or other land in a conservation area, special attention shall be paid to the desirability of preserving or enhancing the character or appearance of that area. The section 72 conservation area duty applies to every decision affecting land inside the designated boundary, whether or not a building on the site is listed and whether or not the proposal touches a historic building at all.

Two features of the wording decide most arguments. The duty is about character and appearance, which are area-wide qualities rather than the merits of a single building. And the two limbs are alternatives, so a scheme that leaves character unharmed satisfies the duty without having to improve anything.

What the duty asks of the decision maker

The House of Lords confirmed in South Lakeland District Council v Secretary of State for the Environment (1992) that the duty is met by a proposal which does no harm to the character or appearance of the area. There is no requirement that every scheme make a positive contribution before it can be permitted.

That is a useful point for applicants and a frequently misquoted one. Officers sometimes refuse on the basis that a scheme fails to improve the area. The statutory duty does not support that, although a development plan policy requiring a positive contribution may do, in which case the refusal belongs under the policy rather than under section 72.

The duty is directed at the authority, not the applicant, so your task is to give the authority the material it needs. It also sits alongside the setting duty in section 66 where a listed building is affected, and the relationship between the two is set out in our note on sections 66 and 72 and what they require of decisions.

Character and appearance are different things

Appearance is what the area looks like. Character is what it is like, which is wider: layout and plot pattern, building lines, the rhythm of frontages, boundary treatments, the relationship of buildings to the street, materials and detailing, trees and spaces, uses and activity, even quietness.

The distinction matters because a scheme can be invisible from the street and still affect character. Subdividing long rear gardens changes plot pattern. Replacing a stone wall with a timber fence changes boundary character. Converting a corner shop to a dwelling removes activity from a street whose character depends on it.

It also means some things the duty does not reach. Internal alterations to an unlisted building in a conservation area are outside planning control, so the question of internal alterations that harm significance arises for listed buildings rather than for ordinary unlisted ones. Say so plainly when a neighbour raises it.

Using the character appraisal

Most authorities have adopted a conservation area appraisal and management plan. It is the single most useful document in the submission, and it is underused.

Read it and then use it against itself in the proper sense: find the passages that describe your part of the area, quote them, and respond to them. An appraisal that identifies the area's character as deriving from two-storey terraces with slate roofs and brick boundary walls gives you a design brief and an evidence base in one document.

Where the appraisal categorises the existing building as a negative contributor, that is the strongest material you will find for a replacement scheme. Where it categorises the building as positive, accept the starting point and argue the detail rather than denying it.

If no appraisal exists, say so and set out your own analysis of character with photographs and a plot pattern plan. Officers accept that readily, because the gap is theirs.

Demolition inside a conservation area

Conservation area consent was abolished in 2013. Demolition of a building in a conservation area is now controlled through planning permission, and carrying out relevant demolition without permission is an offence under section 196D of the Town and Country Planning Act 1990. Thresholds and exclusions apply to small structures and to walls below stated dimensions, so check the current position before assuming a boundary wall can go.

The practical consequence is sequencing. You cannot obtain permission for the replacement and demolish under a separate consent later. The demolition and the replacement are assessed together, which is why a council will resist a demolition application that is not accompanied by an acceptable replacement scheme.

Where a building of interest is to be lost, expect a condition requiring a written and photographic record before works. Our guide to recording a building before demolition or conversion covers the recording levels and what the archive has to contain.

Design responses that satisfy the duty

The responses that work are specific to the character identified, not generic good manners.

• Keep the plot pattern. Where frontages are narrow and repetitive, a wide new frontage reads as an intrusion however well detailed.
• Keep the building line and the eaves line, including on extensions set back from the street.
• Match the roof form and pitch, and keep dormers subordinate in both size and number.
• Use the local material and the local detail, including the mortar, the window reveal depth and the cill detail.
• Keep the boundary treatment. Walls, railings, hedges and gate piers carry more character than people expect.
• Subordinate extensions to the host building in height, depth and prominence.

An illustrative example. A rear extension to a terrace within a conservation area is proposed across the full width of the plot, two storeys, in a contrasting brick. The appraisal describes the area's character as including the legibility of individual plots and the rhythm of rear outriggers visible from a lane. Reducing the extension to a single bay width at first floor, keeping the outrigger form, and using a brick matched to the existing produces a scheme the officer can find neutral in character terms. Neutral is enough.

Where the duty adds nothing

Section 72 is not a design code and it does not import a higher standard of design generally. A proposal in an area whose character is already eroded, on a site that makes no contribution, may engage the duty and then produce no harm to weigh.

Objections that treat any change in a conservation area as harm misread the section, and so do applications that claim a positive contribution without identifying what is being improved. A Heritage Statement that describes the character attributes, assesses the proposal against each one and reaches a reasoned conclusion of no harm is more useful than one that recites the statute.

And read the designation boundary before anything else. Conservation area boundaries are frequently drawn down the middle of a road or along a rear garden line, and a site a metre outside the boundary engages the duty only through its effect on the area, not directly.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. PlanScope produces AI-assisted draft reports for planning applications, and reports should be reviewed before submission. PlanScope does not guarantee planning approval.