Chimney Breast Removal Morden

On the St Helier estate and the 1930s streets around it the stacks are modest, but modest is not the same as self-supporting. Whatever sits above the breast has to land on steel. We appoint a structural engineer to size the beam and its padstones, prop the opening safely, and run the job through building control.

In Morden, 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 Morden.

How the job runs

1. Free site survey at your Morden 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 Merton 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.

Removing a chimney breast in Morden's interwar houses

Many Morden homes still carry their original chimney breasts in the ground-floor reception and the bedroom above, even where the fireplaces have long been blocked up. Because the breast helps support the masonry stacked over it, we start every job with a structural engineer establishing exactly what is being carried before a single brick is disturbed. That is what separates a safe removal from a dangerous one.

Where we take out a breast on the lower floors but retain the stack higher up, we carry that stack on a steel beam set on padstones; gallows brackets are used only where the engineer and building control accept them. Taking the whole stack down only suits a stack that is yours alone; on attached Morden houses the stack is usually shared, so most owners keep it on steel, and we will advise which suits your house.

Housing in Morden

Around 9,990 homes make up Morden on the valuation list; 25% are flats and 75% houses, and 2% date from before 1919, 81% from between the wars and 17% from after 1945. 64% of homes here are terraced; the breasts of a terrace in Morden usually sit on the party wall back to back with next door's, so removing one needs a party wall notice.

Check next door's flue before a Morden chimney breast comes out

64% of homes in Morden are terraced houses, and where a terrace's chimney stack sits on the party wall it carries flues from both houses side by side. Before any breast comes out, find out whether the neighbour's half is still in use. A gas fire, a solid fuel stove or an old boiler next door may vent through a flue that shares brickwork with the part being removed. Cutting into that masonry can open a path for fumes into your house or theirs. A smoke test and a look at the neighbour's fireplace settle it, and the result shapes how the stack is supported.

The roof comes next. If the address is in the John Innes Merton Park conservation area and the stack is being reduced or taken down, look at the second John Innes Article 4 (2) direction. It withdraws permitted development for altering a roof where the roof slope would front a public highway or other public space. A stack rising through the front slope sits in exactly that position. Ask Merton whether an application is needed before the scaffold goes up, and reuse the existing tiles for the patch where you can.

Party wall and building control in Morden

As most Morden houses are terraced or semi-detached, the chimney stack usually sits within the party wall shared with next door. That makes removal notifiable under the Party Wall Act, so you, as building owner, serve notice on the adjoining owner before work begins, and a beam bearing into that shared wall is part of what the notice covers. We give you the drawings and programme it needs, which keeps relations with the neighbouring SM4 household straightforward from the outset.

The structural support is notifiable under the Building Regulations, and Merton Council's building control signs it off, not the planning department. We appoint the engineer who calculates the support, then handle safe removal, propping, capping any redundant flue with ventilation to prevent damp, and replastering so there is no trace the breast was ever there in your Morden home.

Combining the work with other jobs

A chimney breast removal makes a mess of the wall, the floor and the plaster in whatever room it happens in, so it is worth doing at the same time as anything else that room needs. If the house is being rewired, the electrician can chase and run new cables while the wall is open rather than cutting into fresh plaster afterwards. New skirting, a replastered ceiling or a new floor all fit naturally into the same programme.

On the 1930s streets around Morden Hall Park and the St Helier estate, the common pairing is a breast removal downstairs with a knock through between the two reception rooms, since both need propping, an engineer and building control in any case. Doing them together means one set of notices, one inspection sequence and one round of making good. Doing them two years apart means paying for the disruption twice and living through it twice as well.

• Rubble bagged and carried out rather than dropped inside
• Fireplace opening infill and new plasterboard finish
• Ceiling and joist support where the breast carried them

VOA Council Tax stock of properties, March 2025, for Morden Central, Lower Morden and St Helier North. Counts rounded by the VOA.

Next steps that tend to follow chimney breast removal in Morden: home renovation in Morden, chimney breast removal across Merton, how building control signs off a chimney breast removal, the Party Wall Act for a breast in a shared wall, our London chimney breast removal page and Chimney Stack Repair.

The GS Renovation Difference in Morden

Morden 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, the drawings for the party wall notice you serve on next door, Merton building control handled end to end, tidy working in an occupied SM4 home, and a signed-off, replastered 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.