Home› House Extension & Part Demolition Risk Assessment
House Extension & Part Demolition Risk Assessment — Generated Instantly for £29
Describe the extension or part demolition job — structural openings, temporary support, party walls, occupied property status. We generate a fully written, UK-compliant risk assessment covering structural, demolition and occupant safety hazards in minutes.
Used by builders, extension specialists and contractors carrying out domestic alteration works across the UK
🏠 Removing a load-bearing wall or chimney breast? Mention it — we'll include temporary support controls, propping sequence and structural safety measures specific to the job.
Legal requirements for extension and part demolition work
Under Regulation 3(1) of the Management of Health and Safety at Work Regulations 1999, every employer and self-employed person must carry out a suitable and sufficient assessment of risk before undertaking construction work, including domestic extensions and part demolition. The Construction (Design and Management) Regulations 2015 apply to virtually all domestic building work and place duties on contractors to plan, manage and monitor health and safety — a risk assessment is a core part of meeting that duty.
Part demolition work — removing a wall, forming an opening, or stripping out a structure before extending — carries specific risks around structural collapse, unidentified loadbearing elements and services. These risks must be identified and controlled before work starts, with temporary support in place where required, in line with good practice under CDM 2015 and the general duties of the Health and Safety at Work etc. Act 1974.
Where the works affect a shared wall, boundary wall or structure, the Party Wall etc. Act 1996 may also apply, requiring notice to be served on neighbouring owners. While this is separate from health and safety law, it is good practice to record this alongside the risk assessment. A written risk assessment is expected by building control, principal contractors and insurers before work on an occupied domestic property proceeds.
How it works
1. Describe the job
Tell us the type of works — rear extension, loft conversion, wall removal, chimney breast removal — whether the property is occupied, and whether party wall or temporary support issues apply.
2. Let the app take the strain
Anyrisks produces a fully written, UK-compliant risk assessment referencing CDM 2015, the Management of Health and Safety at Work Regulations 1999, and other relevant regulations.
3. Instant download and use
Download as PDF and Word. Hand it to your client, building control officer or principal contractor, or file it for compliance purposes. £29, no subscription.
What it covers
Every house extension and part demolition risk assessment is written in full — covering structural, site and occupant safety hazards.
Structural collapse risk during wall or chimney removal
Temporary support — propping, needling and beam installation
Identification of load-bearing elements before works start
Asbestos risk in pre-2000 properties (COSHH awareness)
Dust and debris control in occupied dwellings
Noise and vibration exposure to residents and workers
Working at height — scaffolding, roof work, loft access
Manual handling of rubble, bricks and building materials
Protection of existing services (gas, water, electrics)
Party wall and boundary structure considerations
Site security and public protection (skips, scaffolding, hoarding)
Fire risk and maintaining escape routes in occupied properties
Trip and fall hazards from building materials and excavations
Weather protection for open structural openings
Works for
From single-storey rear extensions to full internal wall removal, Anyrisks covers every type of domestic extension and part demolition job.
What customers say
"We do a lot of kitchen knock-throughs and loft work for homeowners. Anyrisks gave me a proper assessment covering temporary support and dust control in minutes, not an hour of typing."
Dave R.
Builder, Essex
"Removing a chimney breast is always the riskiest part of the job. The assessment covered propping sequence and structural checks exactly as I'd describe it to a client myself."
Karen M.
Extension contractor, Yorkshire
"Building control wanted to see a risk assessment before sign-off on the wall removal. This did the job perfectly — referenced CDM 2015 and covered the occupied property aspect too."
Tom B.
Self-employed builder, Hampshire
Anyrisks vs DIY templates
| Anyrisks | DIY / Templates | |
|---|---|---|
| Written in full — not a blank form | ✓ | ✗ |
| CDM 2015 and MHSWR 1999 referenced | ✓ | ✗ |
| Temporary support and propping controls included | ✓ | ✗ |
| Covers occupied-property specific risks | ✓ | ✗ |
| Asbestos awareness for pre-2000 properties | ✓ | ✗ |
| Party wall considerations included | ✓ | ✗ |
| Ready in under 2 minutes | ✓ | ✗ |
| Instant PDF and Word download | ✓ | Sometimes |
Frequently asked questions
Do I need a risk assessment for a house extension?
Yes. Under Regulation 3(1) of the Management of Health and Safety at Work Regulations 1999, any employer or self-employed person carrying out construction work — including part demolition and extension work on a domestic property — must carry out a suitable and sufficient risk assessment. Principal contractors will also expect one before allowing work to start under the Construction (Design and Management) Regulations 2015 (CDM 2015).
Is this different from a full demolition risk assessment?
Yes. This assessment is built for part demolition and structural alteration within an occupied or part-occupied domestic building — knocking through walls, removing chimney breasts, forming openings for bifold doors, and building extensions — rather than the full demolition of a standalone structure, which carries different hazards around controlled collapse and is covered separately.
Does it cover party wall and temporary support requirements?
Yes. Mention if the works involve a shared party wall, removal of a load-bearing wall, or temporary propping, and the assessment will include controls for temporary support (needling, acrow props, beam installation) and reference the need for a Party Wall etc. Act 1996 notice where relevant, alongside structural safety controls.
Does it cover asbestos risk in older properties?
Yes. For properties built or extended before 2000, mention the property age and any suspected asbestos-containing materials (artex, pipe lagging, old roofing felt), and the assessment will reference the Control of Asbestos Regulations 2012 and the need for a refurbishment and demolition survey before work starts.
Can it cover working while the property is still occupied?
Yes. Describe whether residents, children or pets remain on site during the works, and the assessment will include controls for segregating work areas, managing dust and noise, and maintaining safe access and fire escape routes for occupants.
Does this satisfy building control and principal contractor requirements?
Anyrisks produces a fully written, regulation-referenced risk assessment in the standard format expected by building control officers, principal contractors and structural engineers overseeing domestic extension and alteration works.
Does it cover scaffolding and working at height on extensions?
Yes. Mention if scaffolding, ladders or roof work are involved and the assessment will include controls aligned with the Work at Height Regulations 2005, covering safe access, edge protection and weather considerations.
How long does it take to generate?
Under 2 minutes. Describe the extension or part demolition works and Anyrisks produces a complete, regulation-referenced risk assessment instantly, ready to download as PDF and Word.
Also see: The ultimate guide to risk assessment · Do I need a risk assessment · Risk assessment legal requirements · AI risk assessment generator