Listed building consent for partial demolition
Works to part of a listed building are alteration under the Shimizu reasoning, so the test is whether character is affected. How to assess the fabric being lost and what the authority will weigh.
Taking down part of a listed building needs consent, and the application you make is for alteration rather than for demolition. That distinction comes from the House of Lords decision in Shimizu (UK) Ltd v Westminster City Council in 1997, which held that works to part of a listed building are alteration unless the whole building is being demolished. The practical test under section 7 of the Planning (Listed Buildings and Conservation Areas) Act 1990 is therefore whether the works would affect the character of the building as one of special architectural or historic interest.
For a landlord or investor removing a leaking 1960s rear wing, that is better news than it sounds. The question is not whether you are allowed to demolish, but whether the loss of that particular fabric harms what makes the building special, and how the authority weighs that harm.
Why partial demolition counts as alteration
Section 7 prohibits the execution of works for the demolition of a listed building, or for its alteration or extension in any manner which would affect its character, unless authorised. Consent is granted under section 8, and section 16(2) requires the authority to have special regard to the desirability of preserving the building, its setting, and any features of special architectural or historic interest which it possesses.
Where the works are to part only, the Shimizu reasoning puts you in the alteration limb. That matters in two ways. The test imports the character threshold, so works that do not in fact affect character fall outside control altogether. And the authority's duty under section 16(2) is directed at features of special interest, which focuses the argument on what the element being removed contributes rather than on the fact of removal.
Separate rules apply in conservation areas. Since the Enterprise and Regulatory Reform Act 2013, the demolition of an unlisted building in a conservation area is handled as relevant demolition requiring planning permission, not conservation area consent. A listed building in a conservation area needs listed building consent, and depending on the works may need planning permission too.
One practical point in your favour: there is no application fee for listed building consent.
Working out what fabric is actually being lost
Start with a survey of the element, not a description of the scheme. Measure it, photograph it in detail, open up where you safely can, and establish its construction, its date and its relationship to the rest of the building.
The questions an officer or conservation adviser will ask are specific. Is the wall you propose to remove an original external wall now internal, carrying the scar of a blocked window or a former roofline? Are the joists reused from an earlier phase? Is the roof structure of the wing a different carpentry tradition from the main range? Does the element complete a plan form that the building would otherwise read as incomplete?
Chimney breasts and stacks are the classic example, and the one Shimizu itself turned on. They are frequently treated as expendable internal clutter and frequently turn out to be part of the plan logic of the building, as discussed in the note on removing, retaining and reinstating chimney stacks.
Boundary structures are another trap. Walls, railings and gates within the curtilage can be listed in their own right or caught by the listing of the principal building, and removing a section of garden wall to form an access can need consent, which is set out in the discussion of boundary walls, railings and gates.
Later additions have their own significance
The weakest heritage statements assume that anything after the main build phase is of no value. Historic England guidance is clear that significance can reside in later alterations, and that each phase should be assessed on its merits.
A Victorian service wing on a Georgian townhouse may record how the household worked. A 1930s shopfront on a Regency building may be a good example of its own period. Conversely, a 1980s flat-roofed extension in reconstituted stone may contribute nothing and its removal may be a positive benefit that the authority will welcome.
The assessment has to be evidenced rather than asserted. Historic maps, the listing description, early photographs, the Historic Environment Record, deeds and sale particulars, and the building fabric itself all contribute. Where the phasing is uncertain, say so and explain what further investigation would settle it.
The harm test the authority applies
National policy divides the outcome in two. Where the proposal would cause substantial harm to, or total loss of, the significance of a designated heritage asset, that should be exceptional for a Grade II listed building and wholly exceptional for Grade I and Grade II*, and permission should be refused unless the harm is necessary to achieve substantial public benefits or a tightly drawn set of alternatives is satisfied. Where the harm is less than substantial, it is weighed against the public benefits of the proposal, including securing the optimum viable use.
Read the current edition of the Framework rather than an older copy, because the chapters were renumbered in December 2024 and reorganised again by policy code in the edition published on 17 August 2026.
Partial demolition cases usually land in the less than substantial category, and the argument then becomes about what the benefits are. Securing a viable use for a building on the at-risk register, removing fabric that is causing damp to original fabric, or restoring a lost historic plan form are all benefits an officer can weigh. A larger floorplate for letting is a private benefit and carries less weight.
| What you are removing | Likely harm position | Evidence to lead with |
|---|---|---|
| Late twentieth century extension of no interest | Neutral or beneficial | Phasing analysis and photographs |
| Victorian rear wing in poor repair | Less than substantial harm | Condition survey and options appraisal |
| Original internal partition and plan form | Substantial harm possible | Plan form analysis and alternatives |
| Chimney breast within original range | Depends on survival elsewhere | Fabric investigation and comparison |
Recording is not a substitute for retention
Expect to be asked for a written and photographic record, and do not expect it to buy you the consent. National policy is explicit that the ability to record evidence of the past should not be a factor in deciding whether loss should be permitted.
Where recording is required it is usually specified against the Historic England levels, from a basic visual record at Level 1 to a full analytical record at Level 4. A later rear wing in a modest terraced house might attract a Level 2 record. A significant element of a Grade II* building would attract Level 3 or 4, with measured drawings and documentary research. The scope, the deposit location with the Historic Environment Record and the timing relative to the works are all normally conditioned, and the historic building recording page sets out what each level includes.
Build the record into the programme. A Level 3 record cannot be done after the wall has gone, and a condition requiring it before demolition starts is one of the easiest conditions to breach by accident.
Structural consequences and making good
Removing part of a historic building changes how the rest of it stands up. Rear wings often buttress the main range, floor joists bear into the wall you intend to take down, and a lime-mortared wall that has stood for 200 years can behave unpredictably once it is loaded differently.
Commission a structural appraisal and have the propping and the permanent structural solution designed before the application, because the authority will want to see how the exposed elevation will be finished. The making-good details are often what decides the case. A new brick elevation in the right bond with a lime mortar and a sample panel reads very differently from a rendered blockwork wall.
Where a party wall is involved, the Party Wall etc. Act 1996 runs alongside and needs its own notices and award. That is a separate statutory process from planning and it is not something a planning application resolves.
Conditions to expect on a consent
- A written and photographic record to a specified Historic England level, deposited with the Historic Environment Record before works begin.
- Sample panels of brickwork, stonework, pointing and render to be approved on site.
- Materials schedules, with salvage and reuse of original material where practicable.
- A method statement for the demolition, including temporary support and protection of retained fabric.
- On schemes where demolition precedes rebuilding, a condition tying the demolition to a contract for the replacement works, so the building is not left as a gap.
The supporting document that carries the argument is the heritage statement, structured to assess significance first, then the effect of the proposal, then the public benefits. Enter your postcode on PlanScope to see which heritage and supporting documents your building is likely to need.
This is general guidance, not legal advice. Check the position with your local planning authority, its conservation officer 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.
Frequently asked questions
Do I need listed building consent to remove a rear extension?
Almost always, because the works would affect the character of the building. The application is for alteration rather than demolition, following the House of Lords decision in Shimizu in 1997. There is no fee for a listed building consent application, so there is little reason to risk proceeding without one.
Is removing a later extension harmful to significance?
Not necessarily. Later fabric has to be assessed on its own merits, and a poorly detailed late twentieth century addition may contribute nothing or may actively detract. Removing it can be a heritage benefit. The assessment has to be evidenced through phasing analysis, historic maps and fabric investigation rather than simply asserted.
Will a written record let me demolish part of a listed building?
No. National policy states that the ability to record evidence of the past should not be a factor in deciding whether loss should be permitted. Recording is normally required as a condition where consent is granted, specified against the Historic England levels, but it does not reduce the harm the authority weighs.
What is the difference between substantial and less than substantial harm?
Substantial harm or total loss should be exceptional for Grade II buildings and wholly exceptional for Grade I and Grade II, and is refused unless necessary to achieve substantial public benefits. Less than substantial harm is weighed against the public benefits of the scheme, including securing the optimum viable use.
Does partial demolition in a conservation area need separate consent?
For a listed building, listed building consent covers the works and planning permission may also be needed. For an unlisted building in a conservation area, demolition has been handled as relevant demolition requiring planning permission since the Enterprise and Regulatory Reform Act 2013 rather than conservation area consent.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.