Survey finding
Chimney issues on your survey: what it means and what to do
Chimneys age, lean, lose pointing, and shed pots, most surveys on pre-war housing will flag at least one of these. This page sets out which chimney findings are routine, which need action, and how to handle the negotiation.
Last updated: 6 May 2026. Editorially reviewed: 20 May 2026.
Finding
Chimney condition and stability
What this usually means
Chimney issues cover stack movement (leaning, twisting), pot stability, pointing condition, flashing failure, and any active flue defects. UK chimneys typically last 60–100 years between major maintenance cycles, and many surveys flag chimneys that are at the end of a maintenance cycle without indicating a structural defect. Calibration matters: a pointed-up chimney with sound flashing on a 90-year-old terrace is a future maintenance item, not an emergency.
Why it matters
Loose chimney pots and severely leaning stacks are public-safety issues, falling masonry causes injury and damage. Lenders rarely refuse on chimney condition alone but may impose a retention until specific defects are remediated. The bigger buyer-cost issue is whether the chimney needs full re-build (£3,000–£8,000) versus pointing and pot repair (£600–£1,500).
Ask your surveyor
- Check:What is the cause of the cracking or movement, pointing, frost damage, sulphate attack, structural settlement?
- Check:Is the stack stable from a public-safety perspective, and would you recommend access for closer inspection?
Ask the seller
- Check:When was the chimney last inspected or maintained?
- Check:Has the flue been swept, and is there an annual sweep certificate?
Next steps
- •Get two written quotes from local trades before negotiating with the seller.
- •Speak to your mortgage broker before exchanging if the finding affects mortgageability.
Browse all findings
- Spray foam insulation
- Evidence of movement
- Damp
- Japanese knotweed
- Damp proof course issues
- Underpinning
- Cracks
- Roof issues
- Timber decay
- Electrical issues
- Non-standard construction
- Asbestos containing materials
- Roof covering needs repair
- Single skin wall construction
- Timber decay / wet rot
- Settlement cracks
- RAAC concrete
- Wall tie failure
- Party wall matters
- Drainage issues
- Subsidence monitoring
- Full electrical rewire needed
- Flat roof condition
- Cladding issues
- EWS1 form required
- Lintel failure
- Structural crack BRE category 3
- Structural crack BRE category 4-5
- Chimney stack movement
- Chimney flashing failure
- Parapet wall movement
- Bay window cracking
- Flat roof ponding
- Cold roof inadequate ventilation
- Warm roof insulation issues
- Prefab concrete construction
- Large panel system (LPS) construction
- Rising damp
- Penetrating damp
- Condensation vs damp distinction
- Dry rot (Serpula lacrymans)
- Woodworm
- Timber floor springiness
- Cellar / basement damp
- Outdated electrics (60-amp fuse board)
- Aluminium wiring
- Partial rewire needed
- Gas boiler condition
- Back boiler
- Unvented hot water cylinder issues
- Lead pipes (pre-1970)
- Lead paint
- Asbestos in Artex ceilings
- Asbestos floor tiles
- Asbestos cement roof
- Asbestos insulated board (AIB)
- Asbestos soffit boards
- Pointing / repointing needed
- Render cracking
- Pebbledash delamination
- UPVC window seal failure
- Sash window condition
- Flat roof membrane condition
- Zinc roof
- Felt roof condition
- Corrugated asbestos roof
- Cavity wall insulation issues
- External wall insulation issues
- No building regulations certificate
- No planning permission for extension
- Certificate of lawfulness needed
- Indemnity insurance required
- Neighbour dispute on file
- EPC F or G rating
- Oil heating property
- Off-gas-grid property
- Solar panel lease vs owned
- Ground source heat pump property
- Air source heat pump property
- Chimney breast removed without support
- Floor joist decay
- Wall bowing
- Mould and condensation
- Septic tank property
- Thatched roof condition
- Listed building restrictions
- Conservation area restrictions
- Restrictive covenants on title
- Coal mining area
- Coastal erosion risk
- Flood risk zone 3
- Radon affected area
- Contaminated land history
- Trees near building
- Party wall agreement outstanding
- EICR required
- Knotweed treatment history
- Single glazing condition
- RCD protection missing
- Damp-proofing guarantee transferability
- PRC (precast reinforced concrete) house
- Airey house
- BISF (British Iron and Steel Federation) house
- Timber frame construction
- Steel frame house
- Wet rot
- Heave (ground movement)
- Chimney condition and stability
- Short lease (under 80 years)
- Fire safety: flat and leasehold issues
- Blocked or condemned flue
- Spalling brickwork
- Diagonal cracks in walls
- Retaining wall condition
- Tanking failure in basement
- Missing or slipped ridge tiles
- Lead flashing condition
- Gutters and downpipes
- Double glazing condensation (failed units)
- Skylight or roof light condition
- Dormer condition and weathering
- Torn or missing sarking felt
- Chancel repair liability
- Easement or right of way
- Boundary dispute or unclear boundary
- Adverse possession risk
- Flying freehold
- Ground rent escalation clause
- High or variable service charge
- Extension without planning consent
- Loft conversion: no building regs
- Single-phase electrical supply only
- Shared or private sewer
- Blocked or collapsed drains
- Cesspit or septic tank
- Solid fuel heating
- No mains gas supply
- Low water pressure
- Private water supply
- Wimpey No-Fines concrete house
- Reema construction
- Unity or Boot construction
- Laing Easiform
- Cornish Unit house
- Cross-wall construction
- In-situ concrete construction
- Oak frame construction
- Radon: mitigation required
- Missing or inadequate fire alarms
- Single staircase: means of escape
- No earthing or bonding
Tool shortcut
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What you need to know
Severity
Significant. Specialist follow-up usually warranted before exchange.
Typical cost to fix
Pointing and pot repair £600–£1,500. Lead flashing renewal £400–£1,200. Partial rebuild above roof line £2,500–£6,000. Full rebuild from below roofline £5,000–£12,000. Sweep and inspection £80–£150 (worth doing on any open flue).
Mortgage impact
Most mainstream UK lenders accept chimney findings as standard maintenance. Severe stack movement or active separation from the main wall may trigger a structural engineer's follow-up and a retention until repair is documented.
Insurance impact
Standard insurance covers storm damage to chimneys; pre-existing wear is not insured. Falling masonry from a chimney is covered as third-party liability. Some insurers ask whether chimneys are in active use.
When to pull out
Pull out only if the chimney is severely unstable, requires rebuild from below roofline at high cost. The seller refuses to engage, and you have insufficient renovation budget. Most chimney findings are renegotiation items, not deal-breakers.
When to renegotiate, and by how much
Get a quote from a specialist roofer or chimney company covering pointing, flashing, pot repair, or rebuild as required. Negotiate on quote plus 15% buffer. Typical outcome: full quote deducted, or the seller arranges work before completion.
Thinking of pulling out or renegotiating? What to do after a bad survey
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The Survey Decoder explains the wording. The full report adds address-specific flood, subsidence, EPC, crime, listed status, building age and price comparison data, so a single finding isn't judged in isolation.
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Check the property before you offer
Flood, subsidence, EPC, crime, schools, transport, broadband, tenure, age, listed status and price checks where data is available.
Run a free previewRead next
Chimney stack movement , often sits near chimney condition and stability on a survey and is the next thing to check.
Editorial review
Editorial owner: BiteRight Ltd, operator of MyPropertyScan. We review buyer guides against UK public property datasets, RICS survey wording, lender requirements, and common buyer questions.
Pages are updated when source coverage, property-risk guidance, survey cost assumptions, or product checks materially change. Methodology and dataset limitations are explained on the MyPropertyScan methodology page.
Sources used
We use UK public and specialist sources where they are available. Public datasets can be incomplete, delayed, or missing for some addresses. Treat them as a starting point, not as a replacement for professional advice.
Source standard: preference goes to official government datasets, statutory bodies, professional standards, and primary dataset publishers. We cite the source family on the page and explain coverage limits rather than filling gaps with unsupported estimates.