Chimney Breast Removal Borough

Buildings around Borough High Street sit tightly packed, and the chimney is almost always in the shared wall, so the Party Wall Act applies and you, as building owner, serve notice on the neighbour, or your surveyor does. We supply the drawings the notice needs, agree access, and programme the work to suit the neighbours. Then the engineer's steel goes in and the room is put back together.

In Borough, 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 Borough.

How the job runs

1. Free site survey at your Borough 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 Southwark 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 Borough

Borough's older flats and terraces often still carry their original chimney breasts, long after the open fires stopped being used. Because the breast helps carry the masonry and stack above it, we never treat removal as a simple knock-out. Every job starts with a structural engineer confirming what sits overhead and how the retained brickwork will be held once the breast at that level is gone.

Where we remove a breast on a lower floor but the stack continues up through the house, we support the retained masonry on a steel beam bearing into the party wall, or on gallows brackets bolted into it where the engineer accepts them. In taller SE1 terraces where the stack is fully redundant, we often take the whole stack down and make the roof good, so nothing is ever left hanging unsupported.

Housing in Borough

Borough has about 12,140 homes on the Council Tax list: 18% pre-1919, 3% interwar and 73% post-war, with flats making up 94% and houses 6%. Where most homes are flats, post-war blocks in Borough rarely have breasts, so one in a flat is checked by the engineer first.

Taking out a pre-1919 chimney breast in a Borough building

In Borough 18% of homes were built before 1919 and just 3% between 1919 and 1939, and a chimney breast in one of those older buildings shapes the job. The breast is soft brick in lime mortar, the flues are often gathered together above the first floor, and the stack may lean on the one next door. When the breast comes out, the structural engineer we appoint designs support for what remains above, and the brick it bears on is checked before the design is final.

Southwark Council's online form lets you begin a building regulations application as a building notice, full plans or regularisation. A single breast on engineered steel is a common candidate for a building notice, because the design is short and the key inspection is on site. Book the inspection for the moment the steel is in and packed, before it is boxed and plastered. A Borough job that closes up the support before the inspector sees it has to open it again.

Party wall and building control in SE1

In Borough's older terraces and converted buildings, the chimney stack almost always sits within the party wall shared with the house next door. That makes removing the breast, and bearing a beam or fixing brackets into the shared masonry, notifiable under the Party Wall Act. You, as building owner, serve the correct notice on your neighbour before work starts, using the drawings we supply, so the shared wall is protected and everyone knows what is happening.

The structural support we install is notifiable under the Building Regulations, so Southwark Council's building control inspects and signs it off. We appoint the engineer for the calculations, carry out the propping and safe removal, cap any redundant flue with ventilation to stop damp forming, and replaster so there is no trace the breast was ever there. You get a tidy chimney alcove and a signed-off result.

Working in a tight SE1 street

Chimney removal produces a surprising volume of brick, mortar and soot, and around Borough High Street there is rarely a front garden to stand it in. We plan the waste route out of the building before anything comes down, protect the stairs and hallway, and arrange either a permitted skip or a grab collection, since a skip standing on the public highway needs a licence from Southwark Council and often a parking suspension. Soot is dusty and it stains, so the flue is swept and bagged before any breaking out begins.

Noise is the other consideration in closely built SE1 property. Breaking out brickwork is loud and it travels through party structures, so we agree hours in advance and give neighbours warning. In a leasehold flat the building's own rules on working hours and lift use apply on top of everything else, and where the property is listed or in a conservation area, altering the visible stack needs consent first.

Doing this before the rewire and replaster

The order you do things in decides how much you pay for twice. Removing a chimney breast opens a wall, disturbs the floor at the hearth and leaves a fresh patch of plaster behind, so it belongs near the start of a programme of works rather than at the end of one. Replaster a room and lay a new floor first, and taking the breast out afterwards means paying for part of both again.

If a rewire is coming, do the removal first. The electrician then chases and drops cables into a wall that is already in its final position instead of working around brickwork about to disappear. The same applies to flooring, which should go down after the hearth void is filled and levelled, and to any fitted joinery. Around Borough Market many flats sit above shops and restaurants, where access to the space below is negotiated once rather than repeatedly.

• Making good, plastering and reinstating the wall line
• Ceiling and joist support where the breast carried them
• Rubble bagged and carried out rather than dropped inside

VOA Council Tax stock of properties, March 2025, for Borough & Southwark Street and Southwark St George's. Counts rounded by the VOA.

People planning chimney breast removal in Borough may also want home renovation in Borough, chimney breast removal across Southwark, builders across London, party walls and chimney breasts, our London chimney breast removal page and Party Wall Act Explained.

Trusted Chimney Breast Removal in Borough

Borough homeowners choose GS Renovation because we treat chimney breast removal as the structural job it is. You get support designed by the engineer we appoint, a steel beam on padstones, or gallows brackets only where the engineer and building control accept them, properly installed, the programme built around the party wall notice you serve on your neighbour, and Southwark building control handled to sign-off, all delivered tidily in an occupied home and 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.