An Edwardian breast in Streatham is typically 1.2 metres wide and projects 350mm, so losing it across two floors gives back close to a square metre of usable room. That is a shower enclosure, or a proper wardrobe. The stack above comes onto a steel beam, sized by the engineer and inspected by building control.
Removing a chimney breast in Streatham
Most Streatham terraces still carry their original breasts in the reception rooms and bedrooms, eating into space that could be better used. Because the breast helps carry the masonry and the stack above it, removing the lower section leaves weight that has to be caught somewhere. We never take a breast out without first understanding what sits over it, so every job starts with a structural engineer looking at the whole stack from ground floor to roof.
Where you keep the upper breast or the roof-level stack, we support the retained masonry on steel gallows brackets bolted into the party wall, or on a small beam where brackets will not do the job. Where the stack is redundant top to bottom, we often remove the whole thing and make the roof good with new rafters, felt, battens and matching tiles, which gives you the cleanest result and no support left carrying dead weight.
Party wall and building control in SW16
In Streatham's terraces the chimney stack sits within the party wall shared with the house next door, so removing a breast or bolting gallows brackets into that wall is notifiable under the Party Wall Act. You serve notice on your neighbour before work starts and keep them informed, which matters when both houses share the same flue structure and the same masonry.
The structural support itself is notifiable under the Building Regulations, and Lambeth Council's building control signs it off, so no planning permission is involved for this internal work. We handle it end to end: the engineer's assessment, safe removal with propping, capping and ventilating any redundant flue to keep damp out, and replastering so the wall looks like the breast was never there.
Sign-off when a whole stack goes
Where the entire stack comes out of a Streatham house rather than a single breast, what Lambeth's inspector looks at shifts upwards. The support question largely disappears, since there is nothing left above to carry. The interest moves instead to the roof: how the opening left by the stack has been framed and tiled, whether the covering is properly closed and weathered, and whether anything the stack was steadying has been dealt with.
That last point catches people out. In some Edwardian roofs a purlin or a rafter takes support from the stack, and removing it leaves a spread that shows up as a dip in the roof line a year later. The inspector will ask about it and so should you. Inside, they still want to see how floors and ceilings were trimmed where the breast passed through them, before any of that gets covered up. Scaffold for the roof work is factored into the programme early, as it usually needs booking further ahead than the steel does.
- Structural engineer's calculations arranged and followed
- Bedroom breast removal to reclaim usable floor space
- Fireplace opening infill and new plasterboard finish
- Loft inspection of the retained stack before work starts
- Steel beam support where gallows brackets are unsuitable
The GS Renovation Difference in Streatham
Streatham homeowners choose GS Renovation because we treat chimney breast removal as the structural job it is. You get an engineer-designed support solution, gallows brackets fixed properly into the party wall and Lambeth building control handled for you, tidy working in an occupied home and a fully certified result, backed by 30+ years across SW16.
- Party Wall Act notices served for stacks in a shared wall
- Flue capped with ventilation so the remaining stack stays dry
- Hearth and floor structure reinstated where the breast is removed
- One point of contact on the phone, not a call centre
- Straight advice on what is and is not worth spending money on
- Neighbours given notice before the noisy stages