OCTOBER 2026 · LONDON COST GUIDE
Chimney Breast Removal Costs in London.
Plan the likely cost of removing one chimney breast, removing chimney masonry across two floors or taking down the complete internal breast and external stack.
The guide separates the Growchance construction range from structural-engineer, Building Control, Party Wall, scaffolding and other external costs that may apply to the property.
All Growchance construction figures are indicative planning ranges excluding VAT, not fixed quotations. Final scope and price require a property-specific review.
Retained chimney masonry, structural support, access, approvals, scaffolding and the required finish can materially change the final quotation.
DEFINE THE REMOVAL SCOPE
“Chimney removal” can describe four very different projects.
A useful cost comparison begins with identifying exactly which parts of the fireplace, chimney breast and external stack are being removed—and which masonry will remain above.
Removing a decorative fireplace surround is not the same as removing a structural chimney breast. Similarly, removing one internal section while retaining the chimney above can require more structural support than removing the complete chimney .
Fireplace and hearth only
The visible surround, fire opening, hearth and associated finishes are removed while the main chimney breast and external stack remain in place.
Usually a finishing or Small Building Works project rather than complete structural chimney removal.One internal chimney breast
One section of the internal chimney breast is removed from a single room while chimney masonry remains on another floor or above roof level.
The retained masonry may require an engineered permanent support arrangement.Removal across two floors
Internal chimney breasts are removed from two levels, usually to recover usable floor area in both rooms while the roof-level stack may remain.
Access, sequencing, temporary support and making good are required across more than one part of the property.Complete breast and stack
The internal chimney structure and the external stack are removed as one coordinated project before the floors, ceilings, walls and roof are made good.
Scaffolding, roof access and external weathering work may form a substantial part of the complete scope.Compare quotations against the same removal scope. Confirm what remains above, the specified support, professional and approval costs, protection, waste removal, plastering, roof work and final finishes before comparing the total price.
GROWCHANCE PLANNING RANGES
How much does chimney breast removal cost?
Typical Growchance construction costs begin at approximately £1,600 – £2,900 excluding VAT for removing one internal chimney breast and rise where multiple floors, an external stack, scaffolding or complex structural work are involved.
The ranges below are for early budget planning. The final quotation depends on the chimney arrangement, what remains above, structural design, access, approvals and the agreed level of making good.
One internal breast
£1,600 – £2,900Depending on the floor affected and the support required for retained masonry above.
Removal across two floors
£2,700 – £4,500For coordinated internal removal across two levels, subject to structure, access and making good.
Complete breast and stack
£3,600 – £6,300Typical complete removal before complex access, unusual roof work or extensive finishing requirements.
STRUCTURAL SUPPORT COSTS
What supports the chimney left above?
When only part of a chimney is removed, the masonry retained above cannot be left unsupported. The permanent solution must transfer its weight safely into suitable existing or new structure.
The appropriate arrangement depends on the chimney, party wall, masonry condition and loads involved. It must be established from the property-specific structural information—not selected only because one option appears cheaper.
Padstones, bearings and supporting masonry
Temporary propping for normal removal
Do not add the beam, bearings, temporary support and demolition allowances automatically to a complete chimney-removal price. A Growchance quotation should identify the structural arrangement and confirm which materials and operations are included within the agreed construction scope.
PROFESSIONAL AND APPROVAL COSTS
Allow for the costs outside the building quotation.
Structural design, Building Control, Party Wall procedures and property-specific permissions may sit outside the Growchance construction price.
These costs should be identified before work begins, but they must not be added automatically to every project. The requirements depend on the structure, ownership, neighbours, proposed removal and approval route.
Structural engineer
£495 – £900 + VATA sensible London allowance for inspection, calculations and drawings for a relatively straightforward chimney-breast alteration.
Building Control
£300 – £500A useful allowance for a straightforward residential chimney-breast alteration. Charges vary between boroughs and registered building-control providers.
Party Wall procedures
Party Wall procedures may apply where the work affects a party wall or party structure. Notice does not automatically mean that a surveyor or Party Wall Award will be required.
Read Official Party Wall GuidancePlanning and listed buildings
£548 where applicableOrdinary internal chimney-breast removal does not normally require a householder planning application. External stack alterations, listed buildings, conservation controls or property-specific restrictions may change the position.
Freeholder or managing agent
£400 – £1,500+Structural alterations in a leasehold flat may require a Licence to Alter together with drawings, calculations and review by the freeholder’s surveyor or legal representative.
Asbestos survey
£300 – £600 + VATA useful allowance for an appropriate targeted or refurbishment survey where the proposed work could disturb suspect materials in an older property.
Growchance construction ranges in this guide exclude VAT. Do not automatically add 20% to every professional, statutory or approval charge shown above. The engineer, surveyor, local authority, building-control provider, freeholder or other supplier should confirm the amount payable and its applicable VAT treatment.
DEMOLITION, ACCESS AND WASTE
Chimney masonry is heavy, dusty and expensive to move.
The demolition itself is only one part of the cost. Masonry must be removed in a controlled sequence, carried safely through the property and disposed of using an appropriate waste route.
Upper floors, restricted staircases, long carrying distances, occupied rooms, parking restrictions and limited skip positions can all increase labour and handling time.
A ground-floor chimney beside an accessible exit is very different from an upper-floor breast where every load must be protected, carried downstairs and moved across a controlled parking area.
Demolition labour
£450 – £900Internal estimating allowance for removing one normal chimney breast within a wider planned project.
Rubble handling and removal
£225 – £450Normal handling and removal of masonry generated by the agreed internal chimney-removal scope.
Restricted access adjustment
+£150 – £450Possible allowance for upper-floor work, long carrying distances or significantly restricted movement through the property.
Typical London six-yard skip
£225 – £400Before substantial street permits, controlled-parking arrangements, bay suspensions or hazardous-waste requirements.
Access details that should be checked before pricing.
Photographs and plans help with an initial review, but the actual carrying route, parking arrangements and protection requirements may need to be confirmed at the property.
Upper-floor removal increases carrying, protection and handling.
Narrow stairs, finished rooms and long routes require additional care.
Skip permits, bay suspensions and parking restrictions can be separate.
Dust separation, temporary access and protection may affect the programme.
Asbestos, hazardous materials, unusual pre-existing waste, substantial parking suspensions, exceptional access arrangements and demolition outside the agreed chimney-removal scope should be identified separately. The allowances above are estimating components and must not be stacked automatically onto a complete project range.
MAKING GOOD AND FINISHING
Allow for the surfaces left behind after removal.
Removing a chimney breast can expose walls, floors, ceilings and adjoining finishes that must be repaired before the room is ready for decoration.
The allowance depends on how many floors are affected and whether the external chimney stack is also removed. The figures below are Growchance planning guidance excluding VAT.
| Making-good work | Guide price ex VAT | Typical pricing basis |
|---|---|---|
| Local brick or block repairs Repairing disturbed masonry around the former breast. | £180 – £450 |
Suitable for limited local repairs. Rebuilding larger wall areas or correcting defective existing masonry is assessed separately. |
| Close a floor or ceiling opening Local framing, boarding and closure of one affected area. | £180 – £450 |
Per area, subject to the existing joist arrangement, opening size and the finish that must be reinstated. |
| Plasterboard and plaster Making good the principal wall or ceiling zone. | £250 – £600 |
Covers a typical affected zone rather than full-room replastering, extensive ceiling replacement or specialist decorative plasterwork. |
| Local skirting or architrave Reinstatement around the altered wall area. | £90 – £250 |
Standard profiles and limited lengths. Bespoke period mouldings, specialist timber and wider room upgrades are additional. |
| Local floor repair Repairing the footprint left by the former chimney breast. | £150 – £500 |
Depends on the subfloor and existing finish. Matching aged boards, tiles or discontinued flooring may require a wider repair or replacement area. |
| Local decoration Preparation and painting of the affected room area. | £250 – £500 |
Per room area after the new plaster is sufficiently dry. Full-room decoration, specialist finishes and extensive preparation are priced separately. |
| Standard roof make-good Closing and weathering the roof after stack removal. | £450 – £1,200 |
Relevant where the external stack is removed and the roof opening can be closed using a straightforward matching construction. |
| Complex roof repair or weathering More involved roof structures, materials or junctions. | £1,200 – £2,000+ |
May apply to difficult access, complex roof junctions, specialist coverings or a wider defective area requiring repair. |
| Chimney scaffolding Safe external access for stack and roof work. | £800 – £1,500 |
Typical planning allowance only. Height, pavement licences, conservatories, restricted access and scaffold duration can change the final cost. |
What may already be included?
A Growchance quotation may include standard local plasterboard, plaster and basic making good when these items are stated clearly within the agreed scope.
The quotation should identify whether decoration, floor finishing and joinery reinstatement are included or remain separate.
What commonly remains separate?
Full-room decoration, replacement flooring, major cornice work and bespoke period joinery are normally separate unless specifically included.
Roof repairs and scaffolding apply principally when the external chimney stack forms part of the removal scope.
New plaster must be sufficiently dry before final decoration. Drying time varies with plaster thickness, ventilation, temperature and site conditions, so an exact decorating date should not be promised before the repaired surfaces have been assessed.
WORKING PROGRAMME
How long does chimney breast removal take?
The working period depends on how much of the chimney is removed, the support design, access and the extent of making good required afterwards.
These are indicative construction periods for an organised, accessible project. Engineering, approvals and Party Wall matters must be resolved before work begins.
One internal chimney breast
2 – 4 working daysA typical allowance for removal within one room, installation of the specified support where required and standard local making good.
Removal across two floors
3 – 6 working daysAdditional time is needed for protection, demolition, material movement and reinstatement across both affected levels.
Internal breast and external stack
4 – 7 working daysIncludes a broader demolition scope and roof-level work, subject to scaffold access, weather and the roof construction.
Complex or restricted project
5 – 10 working daysMay apply where access is difficult, several areas are affected or the support, roof and finishing requirements are more involved.
Site conditions determine the final sequence.
A responsible programme allows for safe demolition, inspection of exposed construction and coordination of the structural and finishing trades.
Restricted access
Long carrying distances, upper-floor flats, narrow stairs and limited loading access slow material handling and waste removal.
Unexpected construction
Concealed services, altered joists, defective masonry or an arrangement different from the expected construction can require further assessment.
Scaffold and weather
External stack removal depends on safe scaffold access and suitable conditions for opening and weathering the roof.
Specialist finishes
Matching period cornices, aged floors, specialist plasterwork or bespoke joinery can continue beyond the principal structural works.
Structural design, permissions, Building Control arrangements, Party Wall procedures, scaffold scheduling and material lead times may need to be completed before the working programme can start. Final decoration must also wait until new plaster is sufficiently dry, which can take longer than one week depending on site conditions.
QUOTATION CHECKLIST
What should a chimney removal quotation include?
Two quotations can show very different totals because they cover different amounts of structural work, making good and professional involvement.
A useful comparison starts with a written scope that identifies both the included work and the exclusions, rather than comparing the final figures alone.
The construction scope should define
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Exactly what will be removed
The quotation should state whether it covers a fireplace, one internal breast, several floors, the loft section, the external stack or the complete chimney structure.
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The structural support arrangement
Steelwork, padstones, bearings, temporary propping and any approved gallows-bracket solution should be identified where they form part of the work.
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Protection and demolition
Room protection, controlled removal, dust management, temporary works and the agreed method of moving material through the property should be clear.
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Waste and site clearance
Confirm whether loading, skips, licensed disposal, parking, skip permits and final clearance are included or charged separately.
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Making good and finishing
The document should identify the plastering, masonry, floor, ceiling, joinery, roof and decorating work included after removal.
Separate responsibilities should identify
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Structural engineer services
Confirm who appoints the engineer and whether the design, calculations, inspection visits and revisions are included within the quoted figure.
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Building Control arrangements
The quotation should state who submits the application, communicates with the inspector, arranges visits and pays the relevant authority or approved-inspector fees.
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Party Wall procedures
Party Wall notices, surveyor appointments, schedules of condition and adjoining-owner fees should not be assumed to form part of the building quotation.
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Freeholder and planning matters
Leasehold consent, a Licence to Alter, listed-building requirements and any necessary planning application normally sit outside the contractor’s construction price.
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VAT and provisional allowances
Confirm whether construction figures exclude or include VAT and identify every provisional sum that may change after opening up or receiving third-party information.
Compare the same scope, finish and responsibility.
A lower price may exclude engineering, support steel, waste, plastering, decoration, scaffolding or statutory arrangements. Bring each quotation onto the same scope before deciding which offers the clearest overall value.
The complete project ranges already represent typical combined scopes. Component figures are provided to explain how a quotation may be formed and should only be added when that item is genuinely outside the quoted project price.
COST VARIABLES
What changes the cost of chimney breast removal?
The number of chimney sections being removed is only the starting point. The final price also reflects the support required, access, waste handling and the standard of reinstatement.
An accurate quotation therefore requires the property and proposed scope to be reviewed rather than relying on the room dimensions alone.
How much of the chimney is removed
Removing one breast within one room costs less than working across two floors or taking down the internal structure and external stack.
The retained structure above
A retained breast, loft section or chimney stack may require designed support, suitable bearings, padstones and temporary propping.
Property construction and condition
Masonry thickness, previous alterations, floor direction, defective brickwork and nearby openings can affect the support and repair strategy.
Access through the property
Upper-floor flats, narrow stairs, long carrying routes, parking controls and limited skip positions increase handling time and site logistics.
Roof and scaffold requirements
External stack removal adds work at height, scaffold access, roof closure and weatherproofing to the internal demolition scope.
Waste volume and removal route
Solid masonry produces substantial rubble. The final allowance depends on volume, weight, loading arrangements, permits and disposal access.
Services within the chimney zone
Electrical cables, pipework, ventilation routes and former gas appliances may require safe isolation, alteration or specialist coordination.
The making-good specification
Local plaster repairs differ from full-room decoration, replacement flooring, bespoke joinery or matching period cornices.
Approvals and property ownership
Engineering, Building Control, Party Wall procedures, leasehold consent and heritage requirements can add separate professional fees and lead time.
Four details help define the right scope.
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01
Which floors contain the chimney breast?
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02
Will any breast or stack remain above?
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03
Is the chimney shared with an adjoining property?
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04
What finished condition is required afterwards?
Photographs and plans are useful for an initial discussion, but the support arrangement, access route, retained construction and visible condition of the surrounding building may need to be reviewed before a reliable quotation is prepared.
ILLUSTRATIVE BUDGETS
Example chimney breast removal scopes.
These examples show how the approved Growchance project ranges relate to different removal scopes. They are planning examples, not fixed quotations.
Each range is a combined construction allowance. Do not automatically add every component price elsewhere in this guide to these totals.
One ground-floor chimney breast
ROOM
- Protection and controlled internal demolition
- Standard rubble handling and removal
- Required support within the agreed scope
- Standard local wall and ceiling making good
- No external chimney-stack removal
Chimney breast removal across two floors
LEVELS
- Removal of connected internal sections on two levels
- Protection and waste movement through both areas
- Required structural support for retained construction
- Standard local making good on both floors
- External chimney stack retained
Complete internal breast and external stack
REMOVAL
- Internal chimney breast removal within the agreed areas
- External chimney-stack demolition
- Standard roof closure and weathering
- Rubble handling and normal waste removal
- Standard local internal making good
Complex complete chimney removal
SCOPE
- Difficult access or extensive scaffold requirements
- More involved structural support or defective masonry
- Complex roof junctions and weathering details
- Several internal levels or larger demolition quantities
- Broader making-good and finishing requirements
Allow for professional and third-party costs.
Engineering, Building Control, Party Wall procedures, planning or listed-building matters, freeholder consent, asbestos surveys and scaffolding are normally treated separately unless the written quotation expressly includes them.
Third-party and statutory charges may use their own VAT treatment. They should be confirmed with the relevant professional, authority or supplier rather than increased automatically.
The actual cost depends on the retained chimney structure, engineer’s design, access, waste route, approvals and required finish. Growchance confirms the project-specific scope and price after reviewing the available information and site conditions.
COMPLETED GROWCHANCE PROJECT
A real chimney removal project in Ealing.
This completed project shows the relationship between the removal scope, working programme and construction cost in an occupied London house.
It is included as verified Growchance project evidence, not as a fixed price for another property.
1930s SEMI-DETACHED HOUSE · EALING
Complete internal chimney breast and external stack removal.
The chimney was not shared with the adjoining property. The work involved removing the internal chimney breast and external stack, followed by the required making good.
A structural engineer and Building Control were involved in the project. The construction work was completed over five working days.
Complete removal
Internal chimney breast and the external chimney stack were included within the project scope.
Unshared chimney
The chimney did not form a shared stack with the adjoining property.
Professional involvement
Structural engineer and Building Control involvement formed part of the project process.
Making good
The affected internal and external areas were made good following the removal work.
The project confirms structural engineer and Building Control involvement, but it does not establish that their separate professional or statutory fees were included within the £4,100 construction figure. Every new project requires its own scope, support design and quotation.
RELATED STRUCTURAL WORK
Chimney removal is a distinct structural project.
Removing a chimney breast is not the same as forming an opening through a load-bearing wall, although both may require structural design, temporary support and Building Control involvement.
Use the page that matches the work being planned so the cost, construction method and approval requirements are considered in the correct context.
Chimney Breast Removal Service
SERVICE SCOPE AND DELIVERYUse the service page when you want to understand how Growchance assesses, coordinates and completes chimney breast or chimney stack removal work.
Load-Bearing Wall Removal Cost Guide
DIFFERENT COST INTENTUse this guide when the planned work involves forming or widening an opening in a structural wall rather than removing a chimney breast.
Structural Alterations Service
BROADER ALTERATION SCOPEUse the structural alterations page when chimney removal forms part of a wider layout change involving several openings, alterations or coordinated building works.
Start with the structure being changed.
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01
Identify the intended result
Confirm whether the aim is to remove a fireplace, remove a chimney breast, take down a complete chimney or create a wider room opening.
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02
Establish what remains above
A retained breast, loft section, chimney stack or wall area can determine whether permanent structural support is required.
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03
Coordinate the correct design
The engineer’s proposal should match the actual structure, intended removal scope and the surrounding building rather than being selected from a generic detail.
Even where the breast does not support the main floor or roof structure, it may support retained masonry above or interact with adjoining construction. The proposed removal and support method should be confirmed for the specific property.
PROJECT PROCESS
From the initial assessment to completed making good.
Chimney removal should follow a defined sequence so the proposed scope, retained structure and approval requirements are understood before demolition starts.
The exact route varies by property, but the following stages show how a typical Growchance project is developed and delivered.
Define first. Design correctly. Remove safely.
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01
Initial project information
Share the property type, location, photographs, relevant plans and the chimney sections you want removed. Confirm whether the chimney is shared and what should remain above.
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02
Site and structure review
The visible chimney arrangement, surrounding construction, access route, affected rooms and likely making-good work are reviewed to define the proposed scope.
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03
Structural design
Where support is required, the structural engineer prepares the project-specific design and calculations for the retained chimney structure and surrounding building.
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04
Approvals and coordination
Building Control, Party Wall matters, freeholder consent, planning or heritage requirements and any necessary surveys are resolved before the relevant work proceeds.
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05
Protection and removal
The work areas and access route are protected. Temporary support, controlled demolition, permanent support and waste handling then follow the agreed design and sequence.
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06
Inspection and making good
Required inspections are coordinated before the work is covered. The agreed masonry, wall, ceiling, floor or roof areas are then made good to the specified stage.
Design information
Structural details and calculations must relate to the actual retained chimney arrangement and proposed removal scope.
Inspection points
Structural support and other relevant work must remain visible until the required inspection has taken place.
Final finish
The quotation should define whether the completed area is left plastered, decorated or finished with flooring and joinery repairs.
Inspection requirements should be agreed in advance. Support steelwork, bearings and other relevant construction may need to remain accessible until the engineer or Building Control inspector has reviewed the completed stage.
FREQUENTLY ASKED QUESTIONS
Chimney removal cost questions.
Practical answers about budgets, support, approvals, timescales and the work normally required after a chimney breast is removed.
01 How much does chimney breast removal cost in London?
Growchance working guidance is £1,800 – £2,900 excluding VAT for a typical ground-floor chimney breast, £2,700 – £4,500 excluding VAT for removal across two floors and £3,600 – £6,300 excluding VAT for complete internal breast and external stack removal.
Complex complete removals may reach £6,300 – £8,100+ excluding VAT. The final cost depends on the retained structure, access, support design, waste route and required finish.
02 Do I need a structural engineer to remove a chimney breast?
A structural engineer is commonly required where part of the chimney remains above and needs permanent support, or where the proposed removal affects surrounding construction.
The engineer should assess the property-specific arrangement and design any required steelwork, bearings, padstones or other support. Growchance guidance for structural engineering is typically £495 – £900 plus VAT, with complex work potentially costing more.
03 Are gallows brackets always acceptable?
No. Gallows brackets are only suitable in certain circumstances. Their use depends on factors including the retained masonry, wall construction, chimney arrangement and the position of the adjoining property.
They should only be used where the structural engineer confirms that they are suitable and the appointed Building Control body accepts the proposed detail.
04 Is Building Control approval required?
Structural chimney breast removal commonly requires a Building Regulations application and inspection. The required route depends on the work and the appointed Building Control body.
The support and relevant construction should remain visible until the required inspection has taken place. Building Control fees are usually separate from the contractor’s construction price unless expressly included.
05 Do I need a Party Wall agreement?
Party Wall procedures may apply where the work affects a shared wall or structure covered by the Party Wall etc. Act 1996. Whether the Act applies depends on the property and proposed work.
Party Wall notices and surveyor costs are normally separate from the construction quotation. Seek appropriate advice early because the procedure can affect the project start date.
06 Can I remove the ground-floor breast and leave the chimney above?
It may be possible, but the retained masonry must be supported safely. The correct solution depends on the weight and condition of the retained chimney, its relationship with the adjoining structure and the available bearings.
A structural engineer should confirm the required support before removal begins.
07 How long does chimney breast removal take?
A typical one-room removal may take 2 – 4 working days. Removal across two floors may take 3 – 6 working days, while complete internal breast and external stack removal may take 4 – 7 working days.
Complex or scaffolded projects may require 5 – 10 working days. These periods exclude the time needed beforehand for structural design, approvals and Party Wall procedures.
08 Does the price include plastering and decoration?
Standard local plasterboard and plaster making good may be included where the written quotation states this clearly. Full-room decoration, replacement flooring, bespoke joinery and specialist period finishes are normally separate.
New plaster must be sufficiently dry before final decoration. Drying time varies with the repaired area and site conditions.
09 Is scaffolding included when the chimney stack is removed?
Scaffolding is normally priced separately unless the quotation expressly includes it. A typical chimney scaffold allowance is £800 – £1,500, but height, access, pavement licences, conservatories and the required scaffold duration can change the figure.
10 Can Growchance provide a fixed quotation from photographs?
Photographs, plans and project information can support an initial discussion and help identify the likely scope. A reliable construction quotation may still require a site review and the relevant structural information.
The final written quotation should define the removal scope, support, waste handling, making good, exclusions, VAT basis and responsibilities for professional or statutory fees.
These answers provide general London cost and planning guidance. They do not replace a structural assessment, statutory advice or a project-specific written quotation.
DISCUSS YOUR CHIMNEY REMOVAL PROJECT
Tell us which parts of the chimney you want to remove.
Share the property location, chimney arrangement and intended finished result. Growchance will review the initial information and contact you to discuss the likely next step.
London postcode, property type, number of floors and whether the property is freehold or leasehold.
Tell us whether you want to remove a fireplace, one internal breast, several floors, the external stack or the complete chimney.
Mention any photographs, plans, structural calculations, surveys, Building Control correspondence or Party Wall information already available.
Submitting an enquiry does not create a contract, confirm structural feasibility or guarantee availability. Project suitability, scope and pricing are confirmed after review and discussion.