Chimney Breast Removal Totteridge
Chimney breast removal with steel beam support in Totteridge, the beam sized by the engineer we appoint and the work signed off by building control.
- Rated 4.9 from 31 reviews on MyBuilder
- London guide: £2,200 to £3,250
- Free site survey, itemised quote
A Totteridge detached house usually has its chimney stack inside the building rather than in a wall shared with a neighbour, and it often serves four or more flues. That makes the breast wider and heavier than the semi-detached equivalent, so the support above is normally a beam on padstones designed by the structural engineer we appoint.
In Totteridge, removing a breast on one floor typically costs £2,200 to £3,250 on a steel beam, and £3,000 to £5,000 across two floors (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Totteridge.
Price guide
| Work | Indicative London range |
|---|---|
| One floor, steel beam (the usual route) | £2,200 to £3,250 |
| One floor, gallows brackets where the engineer and building control accept them | £1,500 to £2,500 |
| Two floors | £3,000 to £5,000 |
Indicative London ranges (MyBuilder and Checkatrade, 2026), not a quotation. Prices checked September 2026. Full breakdown: Chimney Breast Removal Guide.
How the job runs
- Free site survey at your Totteridge address: which floors the breast runs through, a shared stack, any live flue.
- The engineer we appoint designs the support, and the work is registered with Barnet Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
- The floor above is propped and the breast comes down in courses from the top; what remains sits on the support the engineer specified.
- Building control inspects the support before it is covered. We make good, and the completion certificate follows.
Wide internal stacks in N20 detached houses
Because these houses are detached, the stack tends to sit on an internal spine wall serving fireplaces front and back on two floors. That means more brickwork above whatever you remove than in a paired house, and it means the load lands in the middle of the plan where there is no external wall to take it. Gallows brackets suit a modest stack bolted into sound party wall masonry. On a wide internal Totteridge stack they usually will not do, and building control is far less willing to accept them since LABC withdrew its standard detail in 2024.
The practical answer is a beam spanning the width of the breast onto padstones cut into solid brickwork either side, sized for the retained masonry above rather than a rule of thumb. Where breasts are coming out on more than one floor we work top down, so nothing is hammered directly above a section that is only temporarily propped. Redundant flues are capped with ventilation top and bottom, because a sealed flue in an unheated void is how damp appears on a bedroom wall two winters later.
Housing in Totteridge
Totteridge has around 3,700 homes on the Council Tax list: 60% post-war, 33% interwar and 8% predate 1919, with 12% flats and 88% houses. 38% of homes here are detached; a breast in a detached house in Totteridge needs building control but no party wall notice.
Making good the roof after a Totteridge chimney stack comes down
When a stack is taken down, a hole is left in the roof slope and the covering has to be made good. In Totteridge that repair is not only a roofer's matter. The Totteridge Article 4 Direction allows Barnet Council to control minor works including roofing materials. On a house it covers, patching the slope in a different tile, or recovering the whole slope in a new material to hide the repair, can need permission. Tiles or slates matching the originals, set aside as the stack is dismantled, keep the repair within what is already there.
Plan the sequence around that. Before the scaffold goes up, photograph the roof and record the tile type, the ridge detail and the lead flashings around the stack, so the making good can match. Salvage the tiles from around the stack as it comes down and store them on site, clear of the skip. Where the stack stays and only the breasts come out, the roof is untouched and the question falls away, which is one reason owners keep the stack and carry it on steel instead. Inside the Totteridge Conservation Area, ask Barnet as well whether taking down a stack on a visible slope needs permission in its own right.
The roofline, the conservation area and building control
Chimneys are part of what the Totteridge Village conservation area is protecting. A tall brick stack with pots is a defining feature of the village roofline, so taking one off above the roof is an external alteration that Barnet's planning department will take a view on, and taking it down in a conservation area can need planning permission for relevant demolition, which since 2013 has replaced the old separate demolition consent. We flag this before design, because it changes the job: keeping the stack means supporting it permanently at loft or ceiling level, which is more steel, not less.
The structural work itself is signed off by Barnet Council building control under the Building Regulations. The engineer's design, the propping, the beam bearings and the flue capping are all inspected before anything is covered. Party wall notices, which dominate this job in a semi, are usually irrelevant on a detached Totteridge house because the stack sits within your own building. We still check the boundary position at survey, since a stack on a flank wall standing close to the next plot can bring the Party Wall etc. Act 1996 back into play, and it is far cheaper to establish before the scaffold goes up.
- Skirting, cornice and picture rail matched back in
- Building control notification and inspection sign-off
- Fireplace opening infill and new plasterboard finish
VOA Council Tax stock of properties, March 2025, for Totteridge & Barnet Gate. Counts rounded by the VOA.
The GS Renovation Difference in Totteridge
On a wide internal Totteridge stack the difference between a proper beam and a bracket detail is the difference between a signed off job and a refused inspection. GS Renovation appoints the engineer, builds to the calculations, sequences the floors top down and manages Barnet building control. We also tell you early if keeping the stack above the roofline is the sensible conservation area answer.
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FAQ
Frequently Asked Questions about Chimney Breast Removal Totteridge
Is a cheap chimney breast removal quote in Totteridge worth taking?
Before accepting a cheap chimney breast removal quote in Totteridge, check what has been left out. Low quotations tend to be light on approvals and reinstatement, and work done without Barnet Council building control sign-off becomes expensive when the N20 property is sold. The market range is £2,200 to £3,250 for one floor on a beam (indicative); a figure far below it has usually skipped a step in the sequence: the stack above is supported before the breast below comes out.
Can I take the chimney stack off the roof of my house in Totteridge Village?
Sometimes, but treat it as an external alteration rather than a formality. Chimneys are a defining part of the village roofline, so within the Totteridge Village conservation area Barnet's planning department has an interest in losing one, and taking it down in a conservation area can need planning permission for relevant demolition. If the house is listed, or in the curtilage of a listed building, the answer is almost certainly no without consent. Where the stack stays, it needs permanent support once the breasts below are removed, which the structural engineer designs and we build.
Why do Totteridge chimney breasts usually need a beam rather than brackets?
Because the stacks here tend to sit on an internal wall, not in a party wall, and often serve several flues from rooms front and back. That places a wide, heavy mass of masonry in the middle of the plan with no external wall to carry it. Gallows brackets suit a small stack in sound masonry, so the engineer usually specifies a beam onto padstones.
Can one side of a back-to-back stack be removed in a Totteridge house?
Often, if the other side is supported and its flues stay intact. Where a stack serves fireplaces in both the front and rear rooms, removing the breast on one side leaves the retained flues and masonry above to be carried. The engineer designs a beam that picks up that weight, and we check the remaining flues still draw after the work.
Which floor comes first when removing chimney breasts in a Totteridge house?
Where the whole breast is going, we work from the top down, so no masonry is ever left bearing on something already removed. Where only the ground-floor breast goes, the support for everything above goes in first, then the breast below is taken out. Building control inspects the support before plastering, and the engineer's sequence is followed exactly.
Will removing a chimney breast in Totteridge affect a boiler or gas fire flue?
It can. Some chimneys still serve a gas fire or an older boiler, or carry a flue liner. Those appliances are disconnected and made safe by a Gas Safe registered engineer before we break into the breast, and any appliance that stays needs a new flue route. We check every flue in the stack at survey, because a live flue cannot be removed.
Is removing a chimney breast in a large detached Totteridge house a bigger job?
Often, because of the size of what sits above it. The site describes Totteridge housing as mostly post-war large detached houses, and a stack in a house of that size can serve fireplaces on two floors and rise well above the ridge. Taking out the ground floor breast leaves all of that to be carried, so the engineer designs steel bearing into sound walls on either side. The saving is that the whole stack is yours, so there is no party wall notice to wait for.
Is chimney breast removal in a Totteridge terraced house different from a detached one?
Yes, because the breasts sit in the party walls rather than in the middle of the house. 16% of Totteridge homes are terraced houses, and there the stack is shared masonry, with the flues from next door running beside yours. Cutting into it is notifiable party wall work, so the building owner serves notice on the adjoining owner, and the neighbour's live flues are checked before a single brick is removed.
Can a Totteridge chimney stack be lowered instead of taken down completely?
It can, and it is a middle course worth pricing. Lowering a stack to just above the roofline takes weight off the breast below, but the roof covering around it still has to be made good. The Totteridge Article 4 Direction names roofing materials among the minor works Barnet Council can control. Keeping the stack at full height and carrying it on steel leaves the outside unchanged, which avoids that question altogether.
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