Chimney Breast Removal, Amersham HP6

Removing a chimney breast means removing something the rest of the structure may be relying on. In Old Amersham it can also mean altering something the street can see, because the council's own appraisal treats the High Street's chimney stacks as part of its character. We appoint the engineer, build to the calculations, and coordinate building control.

A propped structural opening in a period terrace, carried out by GS Renovation, with the original timber lintel exposed — Acrow props on sole plates carry the floor while the original head is exposed. A Georgian terrace is visible beyond.

Chimney stacks are part of the Old Amersham street scene

The council says so directly. Its Old Town appraisal describes the High Street buildings as mainly Georgian, mostly two storey, with steeply pitched red tile roofs, dominating chimney stacks and mellow red brick walls. Where the stack is visible, what happens above the roof line matters as much as what happens below it.

The Amersham Old Town Conservation Area was designated in 1969 and its boundary was amended in 1992. The council's own conservation area leaflet records 151 listed buildings within it. If your property is listed, listed building consent is a separate matter from building regulations, and it has to be settled first.

The age of the fabric you are cutting into

Old Amersham's stock is old, and the figures are published. The Valuation Office Agency counts 3,250 dwellings in the Old Amersham area, of which 350 were built before 1900. In fabric of that age the breast may be doing more than carrying itself, so the engineer inspects and specifies the support before anything is taken down.

Support, calculations and building control

Whatever sits above the removed breast has to be carried, by gallows brackets or by a steel beam, and that is the engineer's decision rather than ours. Buckinghamshire Council states that structural or architectural drawings and calculations must be submitted with a full plans building control application. We appoint the engineer, submit, and build to the specification.

Indicative London ranges, MyBuilder and Checkatrade, 2026, put a single floor removal at £1,500 to £2,500 where gallows brackets are accepted, and £2,200 to £3,250 where a steel beam is needed. Two floors run at £3,000 to £5,000. Your own quotation is free and carries no obligation.

Rubble bagged and carried out rather than dropped inside
Flue capping with ventilation to keep the stack dry
Hearth removal and floor structure reinstatement
Full chimney stack removal and roof making good
Ground floor removal with the upper stack fully supported

Service areaAmersham · HP6 and HP7

Local authorityBuckinghamshire Council

Part ofBuckinghamshire · about 18 miles from our base

Typical homesA timber-framed Old Town High Street with interwar estates on the hill

Also covered nearbyChesham, Beaconsfield, Berkhamsted, Rickmansworth and High Wycombe

The GS Renovation Difference in Amersham

Because a chimney breast is a structural element and, in the Old Town, a visible one. We do not guess at what carries the stack that remains. We appoint a structural engineer, work to the calculations, coordinate the Buckinghamshire Council application and inspections, and make good so the room reads as though the breast was never there. Fully insured, with free no obligation quotations.

Our own trades on site rather than a chain of subcontractors
Steel beam support used where gallows brackets are not suitable
Materials priced at options, so you choose the finish
Straight advice on what is and is not worth spending money on
Paperwork and certificates handed over for when you sell
Hearth and floor structure reinstated where the breast is removed

Written and reviewed by Abdelaaziz Saaid, founder of GS Renovation Ltd, who has spent more than 30 years on the tools and on site in London homes. Structural design is specified by the consulting engineer appointed to your project.

FAQ

Frequently Asked Questions about Chimney Breast Removal Amersham

What drives the cost of chimney breast removal in an Amersham home?

Scope first, condition second, access third. A chimney breast removal project in an Amersham home is costed on what the structure is actually doing, which is why an engineer is appointed where the design requires one. Getting a lorry or a skip near the HP6 property in Amersham changes the labour line more than people expect. The Buckinghamshire Council fee is shown separately, and the HP6 survey establishes all three before GS Renovation commits to an Amersham figure. As a rough guide, chimney breast removal in London costs roughly £1,500 to £2,500 for a single floor where gallows brackets are accepted, or £2,200 to £3,250 where a steel beam is needed, which is the more common route now that LABC has withdrawn its standard gallows detail; two floors run £3,000 to £5,000 (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.

Which building control route does a chimney breast removal take in Amersham?

Buckinghamshire Council decides, and its wording points towards full plans. The building notice route is described for small-scale work such as removing one or two internal load-bearing walls, and a chimney breast is not on that list. The full plans route covers extensive internal structural alterations to any building, and structural or architectural drawings and calculations must be submitted with the application. We submit and coordinate the inspections.

Our house is in Amersham-on-the-Hill, not the Old Town. Does taking the stack down still matter to the council?

It matters where the roof sits in a conservation area. On the Weller Estate the council asks that the outline of the roof is left unbroken on the side the public can see, because those sloping roofs are the leading element of the area's character. That conservation area covers Highfield Close with parts of Green Lane, Grimsdells Lane and Woodside Road, and The Drive on the south side of the railway.

The wall is timber framed. Does that rule out gallows brackets?

It changes what the support can be fixed to. Gallows brackets are bolted into sound masonry, so where the wall is a timber frame the engineer specifies another form of support, such as a beam on new bearings. The council's Old Town appraisal records that timber framing survives in Amersham High Street and becomes more predominant towards the 17th century Market Hall. The engineer inspects and decides, and we build what is drawn.

The stack is shared with next door. Does that change what we can do?

Yes. A shared stack sits within a party structure, so the work falls under the Party Wall etc. Act 1996 and your neighbour has to be notified before it starts. Their flue may also pass through the brickwork you want to remove, which the engineer checks at every floor. Buckinghamshire Council still needs the structural drawings and calculations with the full plans application, and we coordinate that side.

Chimney Breast Removal Amersham

Chimney stacks are part of the Old Amersham street scene

The age of the fabric you are cutting into

Support, calculations and building control

The GS Renovation Difference in Amersham

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Frequently Asked Questions about Chimney Breast Removal Amersham

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Chimney Breast Removal Near Amersham

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