Demolition method statements and structural stability
The stability case is the part of a demolition method statement that gets rejected, and it belongs to the structural engineer rather than the contractor.
A demolition method statement has to show two things: how the building comes down, and why the ground, the retained structure and everything attached to it stay standing while it does. The second is the part that gets rejected. A contractor's template describing plant, exclusion zones and hours tells a reviewer nothing about whether removing the third floor slab leaves the party wall to the terrace next door unrestrained.
Treat the stability case as a structural engineering document that the contractor's sequence has to follow, rather than as a paragraph inside a safety document.
What the statement has to demonstrate
Four things, in this order. What is being removed and what is being kept, drawn rather than described. The structural form of the building as it exists now, established by survey and opening up, because record drawings on a Victorian or interwar building are usually wrong or absent. The sequence of removal, stage by stage, with the stability of the remaining structure confirmed at each stage. And the temporary works needed to hold anything that is no longer self-supporting.
The code of practice for demolition sets out the recognised methods and the survey and planning expectations, and a statement that references it and then ignores its structure is easy to spot.
Where the demolition is partial, which covers most change of use and conversion schemes, the statement also has to say how the interface between removed and retained fabric is formed and weathered. That is where structural risk in a change of use application usually concentrates.
Retained and adjoining structures
Terraced and semi-detached buildings share structure whether or not anyone drew it that way. A party wall that has been laterally restrained by floor joists for a century loses that restraint when the floors go, and a two-storey wall standing free in wind with no return is a genuine hazard rather than a theoretical one.
The statement should identify every shared or abutting element: party walls, party floors, shared chimney stacks, corbelled brickwork spanning a boundary, flying freeholds, and any structure relying on the building for lateral support. For each, say what is being done about it. Options are propping, needling and shoring, temporary strapping back to a retained frame, or sequencing so the restraint is replaced before the original is removed.
Adjacent to a railway, a canal, a highway or a statutory undertaker's apparatus, the asset owner will want to see the same information and will usually impose its own requirements. Build their review period into the programme, because it is rarely short.
Survey the neighbour before you start, not after. A pre-condition survey with dated photographs of cracking, render, ceilings and boundary walls is the only defence against a claim that the demolition caused damage that was already there. Where the adjoining building is occupied, agree access for the survey in writing, and record refusals as carefully as inspections.
Sequencing and temporary propping
Write the sequence as numbered stages, each with a drawing and a stability statement:
- Soft strip of non-structural fabric, after asbestos clearance.
- Roof covering and structure, working from the top down and maintaining the perimeter restraint.
- Floor by floor removal, with propping installed before the restraint it replaces is removed.
- Removal of the frame or loadbearing walls in a stated order.
- Slab and foundation removal, with excavation support where a neighbouring foundation is within the zone of influence.
- Site clearance and restoration to the agreed condition.
Temporary works need a design, a designer, a check proportionate to the risk, and an inspection regime. Under the Construction (Design and Management) Regulations 2015 the arrangements for demolition or dismantling have to be planned and recorded in writing before the work starts, and a method statement that never identifies a temporary works designer is not compliant with that.
Dust, noise and working hours
These belong in the statement because the planning condition will ask for them. Expect dampening down at the point of breaking rather than a hose pointed at a cloud, sheeted scaffolds where the building adjoins the highway, wheel washing, a haul route, and an agreed set of hours that reflect the council's own standard restriction.
Noisy demolition near housing may justify a prior consent application for the works under the relevant control of pollution powers, which fixes the hours and methods in advance. Ask the environmental health team at pre-application. Agreeing hours before you programme is faster than arguing about them after a complaint.
Vibration deserves its own paragraph where there is sensitive fabric nearby, meaning a listed building, a shopfront with historic glass, or a hospital with imaging equipment. Set trigger and action levels, say where the monitors go, and name who receives the alarm. Breaking with a hydraulic hammer next to a Georgian terrace is the classic way to turn a straightforward demolition into a dispute.
Site security matters too. Hoarding, lighting, and a plan for what happens overnight belong in the statement, because a partly demolished building is an attractive and dangerous place.
Restoration where nothing follows immediately
Where demolition is consented ahead of redevelopment, the authority will want to know what the site looks like in the meantime. Prior approval under Part 11 of Schedule 2 to the GPDO 2015 covers the method of demolition and any proposed restoration of the site, so restoration is a matter the council can properly refuse on.
Say what the ground surface will be, how the site is secured, what happens to boundary treatments, whether hardstanding is retained and how surface water is managed once the roof that used to shed it has gone. A cleared site that floods the neighbour's garden the first winter is an avoidable problem.
The approval routes, and how they differ
Three regimes run in parallel and none substitutes for another.
| Route | What it controls | Who decides |
|---|---|---|
| Planning permission or prior approval | Whether demolition is acceptable, and the method and restoration | Local planning authority |
| Section 80 notice under the Building Act 1984 | Shoring, weatherproofing, drainage sealing, making good | Local authority building control |
| Party Wall etc. Act 1996 | Works to party structures and excavation near neighbours | Appointed surveyors, by award |
In a conservation area, demolition of an unlisted building is relevant demolition and needs planning permission, and carrying it out without permission is a criminal offence. For a listed building, demolition in whole or part needs listed building consent, and recording of the fabric before loss is commonly conditioned.
Where slabs and foundations come out next to a neighbouring building, the ground movement question is the same one covered by a basement impact assessment and its staged scope, and several London boroughs will expect that level of analysis even for a demolition-only application.
Asbestos sits outside all three. A refurbishment and demolition survey identifies what is present, licensable removal is carried out by a licensed contractor under notification, and the clearance certificate precedes structural work.
You can draft the planning-side documents with PlanScope, including the Structural Survey, then have them reviewed by your engineer. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. For specialist technical reports, qualified professional input may be required, and a demolition method statement is engineering work that sits outside PlanScope's report types. This is general guidance, not legal advice, so check the position with your local planning authority or a qualified professional before relying on it.
Frequently asked questions
Does demolition always need planning permission?
No, and the answer depends on the building and its setting. Some demolition is permitted development subject to prior approval of the method and site restoration under Part 11 of Schedule 2 to the GPDO 2015, some falls outside the definition of development altogether, and demolition of an unlisted building in a conservation area is relevant demolition needing planning permission. Check with your local planning authority before programming.
What is the difference between the planning route and the section 80 notice?
They are separate and both usually apply. The planning route decides whether demolition is acceptable and, under prior approval, whether the method and restoration are acceptable in planning terms. The section 80 notice under the Building Act 1984 goes to the local authority in its building control role, which can serve a counter-notice requiring shoring, weatherproofing and sealing of drains.
Who should write the stability section?
A structural engineer, working from a survey of the building as it stands rather than from record drawings. The contractor writes the means and sequence. The engineer confirms that each stage leaves the remaining structure stable and specifies temporary works. Splitting those responsibilities clearly is what makes the statement reviewable.
Is a party wall award the same as approval to demolish?
No. The Party Wall etc. Act 1996 is a civil regime between neighbours and runs alongside the planning and building control routes. An award settles how work to a party structure or excavation near a neighbouring building is carried out and what protection is provided. It does not grant any planning consent.
Does asbestos removal go in the method statement?
The statement should reference it and sequence around it, but asbestos is controlled separately under the Control of Asbestos Regulations 2012. A refurbishment and demolition survey comes first, licensable work needs a licensed contractor with notification to the regulator, and removal precedes structural demolition in almost every sequence.
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.