Chimney Breast Removal Golders Green

Parts of NW11 fall inside the Hampstead Garden Suburb conservation area, where external alterations are tightly controlled, so taking a stack down above roof level can need consent that an internal removal does not. We check before promising anything. Indoors, the work follows the engineer's design with building regulations approval in place.

In Golders Green, 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 Golders Green.

How the job runs

1. Free site survey at your Golders Green 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 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.
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 Golders Green

Most Golders Green houses, and many of the flats converted from them, still carry their original chimney breasts, and because the breast helps support the masonry and the stack above it, taking one out is a structural job rather than simple demolition. We start with a structural engineer who works out exactly what the breast is holding up before we plan how to support the load once it is gone.

On the lower floors we support the retained stack above on a steel beam bearing into the party wall, or on gallows brackets bolted into it where the engineer and building control accept them. In many NW11 houses the stack runs full height, and there we more often remove the whole stack and make the roof good afterwards. We never leave a stack sitting unsupported once the breast below it has been taken out.

Housing in Golders Green

By the valuation list's count, Golders Green holds about 7,590 homes, 44% houses and 56% flats; by age, 47% were built before 1919, 26% between the wars and 27% since 1945. Most homes here are flats, and a chimney breast in a flat in Golders Green often supports the breasts in the flats above, so removal needs the freeholder's licence and designed support.

Several flues in one Golders Green stack and who uses them

In a house built before 1919, which describes 47% of Golders Green homes, each principal room had its own fire, so one stack can gather four or more flues from different floors. The breast you want removed on the first floor may also contain the flue from the ground floor room below it. Take it out and that lower fireplace can never be used again unless a new flue route is designed. Before the engineer starts, we identify which flue serves which room, using the pots, the fireplaces and a smoke test where needed, so the decision about each fireplace is made deliberately rather than discovered afterwards.

In a converted house the stack is shared property. 56% of Golders Green homes are flats, and in a divided house the flues in one stack may serve several different flats, one of which may still vent a gas fire or an old boiler. The lease will normally treat the stack as part of the building, so the freeholder's written consent is normally needed for the breast removal, and the other leaseholders need to know which of their flues are affected. A flue that another flat still uses must stay intact, lined where required and properly supported, whatever happens to the breast in your flat.

Party wall and building control in NW11

In Golders Green's semis and terraces the chimney stack usually sits within the party wall shared with the house next door. Because removing the breast, and bearing a beam or fixing brackets into that shared wall, affects the neighbour's structure too, the work is notifiable under the Party Wall Act, and you serve the notices as building owner before anything starts.

The structural support is notifiable under the Building Regulations, and Barnet Council's building control inspects and signs it off. This is internal work, so no planning permission is involved unless the building is listed, when listed building consent is needed. We manage the whole job: calculations from the engineer we appoint, safe removal and support, capping any redundant flue with ventilation to keep damp out, and replastering so there is no sign the breast was ever there.

Dust, waste and the days it takes

A single breast produces more material than most people expect. Two floors of brickwork in a Golders Green house can fill a couple of tonnes of bags, and it all has to leave through the hall. We seal the room with a screen and a zipped door, run an extractor to the outside so the dust goes out rather than round the house, and lay boards over the floor from the front door to the work area.

Where a skip will not fit on the street, and on many NW11 roads a permit is needed to stand one on the highway, the debris is bagged and collected instead. Bags are stacked at the front and cleared as they build rather than left over a weekend. The demolition itself is two or three noisy days; the rest of the fortnight is support, plastering and making good, which is quiet and much less intrusive to live with.

Levelling the floor where the hearth sat

Under the breast there is almost always a hearth, and under the hearth a slab of concrete cast into a hole in the timber floor with the joists trimmed around it. Break the breast out and that slab has to come out too, otherwise you are left with a hard grey rectangle sitting proud of the boards in the middle of the room. Removing it exposes the void beneath, which in most Golders Green houses is a shallow subfloor that has not seen daylight since the house was built.

The repair is proper carpentry rather than filler. New timbers are let in to carry the boards across the opening, the levels are checked against the existing floor rather than assumed, and reclaimed boards of the same width go back so nothing telegraphs through a rug or a wood finish later. If the room is getting a new floor anyway, tell us at survey, because the make up under a fitted carpet, an engineered board and tile all differ, and the levels are far simpler to set right once than to correct twice.

• Ceiling and joist support where the breast carried them
• Making good, plastering and reinstating the wall line
• Structural engineer's calculations arranged and followed

VOA Council Tax stock of properties, March 2025, for Golders Green North and Golders Green South. Counts rounded by the VOA.

Alongside chimney breast removal in Golders Green, the pages that usually help next are home renovation in Golders Green, chimney breast removal across Barnet, 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 Cracks in Walls: When to Worry.

The GS Renovation Difference in Golders Green

Golders Green homeowners choose GS Renovation because we treat chimney breast removal as the structural job it is. You get an engineer-designed support solution and Barnet building control handled end to end, tidy working in an occupied NW11 home, and a fully certified finish, 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.