Chimney Breast Removal New Malden

The dining room in a New Malden semi is often the one that suffers, with a breast eating into the wall where the table should sit. Taking it out squares the room off. We prop, remove, install the steel the engineer has specified for the masonry above, cap and vent the flue, then plaster.

In New Malden, 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 New Malden.

How the job runs

1. Free site survey at your New Malden address: which floors the breast runs through, a shared stack, any live flue.
2. The engineer we appoint designs the support, and the work is registered with Kingston Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
3. The floor above is propped and the breast comes down in courses from the top; what remains sits on the support the engineer specified.
4. Building control inspects the support before it is covered. We make good, and the completion certificate follows.

Chimney breast removal in New Malden's semis

Many New Malden semis still carry their original 1930s chimney breasts, projecting into a bedroom or the through lounge and eating into otherwise generous rooms. Because the breast helps support the brickwork and stack above, we never simply cut it out. A structural engineer first checks what load it carries, then designs a support that holds the retained masonry safely once the lower breast is gone.

On these interwar houses the breast very often sits within the party wall shared with the adjoining semi. Where a chunk of stack is retained above, we carry it on a steel beam set on padstones; gallows brackets are used only where the engineer and building control accept them. Removing the whole stack only works where it is yours alone; a stack shared with the attached semi usually stays, which also keeps the roofline matching next door.

Housing in New Malden

New Malden has around 7,070 homes on the Council Tax list: 34% post-war, 33% interwar and 33% predate 1919, with 31% flats and 69% houses. 31% of homes here are semi-detached; the shared stack of a semi in New Malden means a party wall notice before removal.

Taking a New Malden chimney stack down above the roofline

Removing the breasts inside an unlisted New Malden house is internal work. Taking the stack down above the roof is not, because it changes the outside of the building. Kingston's guidance says that in its conservation areas, demolishing a main building, garage, outbuilding or wall, or making an external alteration, needs the council's approval, and Kingston has 26 conservation areas covering about 9.4% of the borough. So before a scaffold goes up for a full removal from ground to ridge, check whether your street is inside one. If it is, the stack may have to stay as a visible feature, carried on steel in the roof space, even when every breast below it comes out.

House type changes the neighbour picture too. In New Malden 27% of homes are terraced houses and 40% are semi-detached or detached. Where a stack rises from a party wall, the flues of both houses can be gathered into the same brickwork, so your half cannot simply come down on its own. Kingston's boundaries page says notice must be given to the neighbour before work on a shared party wall, and as building owner you serve it. We ask to look into the neighbour's loft, or have the flues surveyed, before the design, because a flue still in use next door changes what can be removed.

Party wall and building control in KT3

Because the chimney stack usually stands in the shared party wall of a New Malden semi, removal is notifiable under the Party Wall Act. Bearing a beam into that wall, or otherwise cutting into it, affects your neighbour's property, so you, as building owner, serve notice on the adjoining owner before work begins; we give you the drawings and programme it needs.

The structural support is a building regulations matter, and Kingston Council building control inspects the beam, or brackets where accepted, and signs the work off. No planning permission is needed for this internal work. We manage the whole sequence around the engineer's assessment: safe removal, propping, capping any redundant flue with ventilation to prevent damp, then plastering so no trace of the breast remains.

A listed building is the exception: work that affects its character, inside or out, including an extension or taking out a wall or chimney breast, needs listed building consent from Kingston Council, and doing it without consent is a criminal offence.

What happens in the loft when the stack stays

If the ground and first-floor breasts come out but the stack carries on above, then part of the job happens in the roof space. The engineer needs to see how the stack is built where it passes through the loft, whether anything is bearing against it, and whether the support can be taken from sound masonry at that level. In a KT3 semi that usually means clearing boarding and stored belongings before the survey. It is also the point at which we confirm whether the stack is genuinely redundant or still serving a flue.

There is practical work up there too. Insulation is disturbed around the base of the stack and has to be reinstated, a cold water tank sitting alongside it may need resupporting, and anything fixed to the brickwork, from cabling to a television aerial mast, is refixed. We leave the loft boarded back and the insulation continuous, because a chimney job that ends with a cold patch in the ceiling below has not really finished.

• Hearth removal and floor structure reinstatement
• Building control notification and inspection sign-off
• Soot and debris contained with screens and sheeting

VOA Council Tax stock of properties, March 2025, for New Malden East and New Malden West. Counts rounded by the VOA.

Plenty of New Malden projects start with one job and grow, so it helps to see home renovation in New Malden, chimney breast removal across Kingston upon Thames, how building control signs off a chimney breast removal, the Party Wall Act for a breast in a shared wall, how we handle chimney breast removal across London and Chimney Stack Repair.

The GS Renovation Difference in New Malden

New Malden homeowners choose GS Renovation because we treat chimney breast removal as the structural job it is. You get an engineer-designed support, usually a steel beam on padstones, with gallows brackets only where the engineer and building control accept them, Kingston building control handled end to end, tidy working in an occupied home, and a signed-off result backed by our founder's 30+ years on the tools.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.