Chimney Breast Removal St Albans
Chimney breast removal with steel beam support in St Albans, the beam sized by the engineer we appoint and the work signed off by building control.
- Rated 4.9 from 31 reviews on MyBuilder
- Guide from £2,200 (London-derived)
- Free site survey, itemised quote
GS Renovation removes chimney breasts in St Albans houses, on one floor or through two, with everything left above properly supported to a structural engineer's design. Older St Albans stock is concentrated in particular areas, and the breast you want out is carrying weight. We appoint the engineer and coordinate the building control inspections.
For St Albans, on London-derived ranges 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; Hertfordshire work generally runs below that. GS Renovation Ltd, a building contractor based in Potters Bar, does the work in St Albans.
Price guide
| Work | Indicative range |
|---|---|
| One floor, steel beam (the usual route) | £2,200 to £3,250 |
| One floor, gallows brackets where the engineer and building control accept them | £1,500 to £2,500 |
| Two floors | £3,000 to £5,000 |
Indicative London ranges (MyBuilder and Checkatrade, 2026), not a quotation. Hertfordshire work generally runs below the London figures; your price follows a site visit. Prices checked September 2026. Full breakdown: Chimney Breast Removal Guide.
How the job runs
- Free site survey at your St Albans address: which floors the breast runs through, a shared stack, any live flue.
- The engineer we appoint designs the support, and the work is registered with St Albans and Watford building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
- The floor above is propped and the breast comes down in courses from the top; what remains sits on the support the engineer specified.
- Building control inspects the support before it is covered. We make good, and the completion certificate follows.
Where the older St Albans chimney stock sits
Chimney breasts belong to older housing, and two St Albans areas stand out in the figures. In Bernards Heath, 1,650 of 2,620 dwellings, 63.0 per cent, were built before 1945, the highest pre 1945 share of the 19 St Albans District areas with published VOA data. In the Verulam Park area, 780 of 3,190 dwellings, 24.5 per cent, were built before 1900.
In housing of that age a breast can run from ground floor to roof, with the stack still standing once a lower section comes out. That is the whole engineering problem. Whatever is removed has to be replaced with support, now usually a steel beam on padstones, with gallows brackets bolted into sound masonry only where the engineer and building control accept them.
Housing in St Albans
The stock in St Albans runs to roughly 29,270 dwellings, 32% of them flats and 69% houses, built 19% before 1919, 17% between 1919 and 1939 and 63% after 1945. A terrace breast in St Albans usually sits on the party wall, so removal needs a notice, and 27% of homes here are terraced.
How St Albans compares with England and Wales
St Albans District has a lower pre 1945 share than England and Wales as a whole, which makes the older pockets worth identifying before you plan the work. 19,040 dwellings in the district, 30.0 per cent of the stock, were built before 1945, compared with 35.2 per cent across England and Wales. In the Clarence Park area, 1,060 of 3,600 dwellings, 29.4 per cent, were built before 1919.
Cost follows the method and the number of floors. Indicative London ranges, MyBuilder and Checkatrade, 2026, put a chimney breast removal on one floor at £2,200 to £3,250 where a steel beam is needed, which is now the usual route, and at £1,500 to £2,500 where gallows brackets are accepted. Removal through two floors runs £3,000 to £5,000. We quote after seeing the breast, the stack and the party wall position.
Get the new support inspected before anything is plastered over
If St Albans building control is not informed of the relevant stages of work, it may require the work to be opened up so that compliance with the Building Regulations can be checked. On a chimney breast that means exposing the bearings of the steel beam, or of brackets where they were accepted, after the room has been made good. We book the inspection while the support is still open to view.
The council's advice on unsafe structures points to the same discipline. St Albans City and District Council advises that if you are concerned part of your property may be dangerous, you should deal with it through properly qualified professionals such as structural engineers, architects and builders. We appoint the engineer, build to the design, and never produce structural calculations ourselves.
- Full chimney stack removal and roof making good
- Programme planned around party wall notice periods for a shared stack
- Roof tiling, flashing and leadwork made good
VOA Council Tax stock of properties, March 2025, for all 9 statistical areas in St Albans. Counts rounded by the VOA.
Trusted Chimney Breast Removal in St Albans
The decision that drives a chimney breast job is how the remaining stack will be carried, and that is the engineer's call rather than the builder's. We appoint the structural engineer, build to the design, and book the building control inspection while the beam, or brackets where they are accepted, are still visible. Fully insured, with building control applications and inspections coordinated, and free no obligation quotations. Rated 4.9 from 31 reviews on MyBuilder.
Reviewed jobs near St Albans
2 MyBuilder reviews from St Albans, with each customer's own job title:
- Downstairs toilet fitting, St Albans, 24 Jan 2018 (1 out of 5)
- Complete new bathroom inc tiling walls & floor, St Albans, 20 Nov 2017 (5 out of 5)
Read all 31 on our reviews page.
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
George is a very hard working builder, and has done a fantastic job on replacing my Bathroom. His attention to detail was great and I wouldn't…
The kitchen has been fitted to the high standard. Saaid was polite, professional, tidy, he pays attention to a little details that make huge…
FAQ
Frequently Asked Questions about Chimney Breast Removal St Albans
How much should a St Albans homeowner set aside for chimney breast removal?
The right sum to set aside for chimney breast removal in St Albans is fixed after the survey, not before it, and usually falls within £2,200 to £3,250 for one floor on a beam (London-derived). Guessing usually means guessing wrong, and the AL1 visit costs nothing. GS Renovation then gives an itemised total including a St Albans and Watford building control inspection of the stack support before concealment. Call 07472 424 226 or email info@gsrenovationltd.co.uk.
What happens to the neighbour's side of a shared chimney stack?
Nothing is removed from their side. Where a breast sits in or against a party wall, what remains has to be supported without disturbing the neighbour's flue, and the party wall route applies before work starts. In the Cottonmill and Sopwell area, terraced houses account for 1,190 of 3,240 dwellings, 36.7 per cent, so shared stacks are part of the picture. We build to the engineer's design once notices are settled.
Does the flue left behind need to be vented?
Yes. A flue left in place after a breast is removed needs ventilation, so that trapped moisture does not condense inside it and stain the chimney breast above. That means a vent low down and a capped but ventilated terminal at the top. In the St Albans Central area, 1,560 of 5,070 dwellings, 30.8 per cent, were built before 1900, and flues of that age served open fires.
Does taking the stack down above roof level need planning permission?
It can, because that alters the outside of the building. Four heritage Article 4 Direction areas cover parts of St Albans District: Verulam and Fishpool Street, Sopwell Lane and Albert Street, Cunningham Avenue and Childwickbury. In those areas the Part 1 permitted development rights have been removed, and a roofline change reads from the street. Removing a breast internally and leaving the stack standing is a Building Regulations question instead.
How does the brickwork come out of a terraced house with no side access?
Through the house, bagged and carried by hand. A breast taken out through two floors produces a substantial volume of masonry, mortar and soot. In the Camp and Cunningham area, terraced houses account for 880 of the 2,840 dwellings, 31.0 per cent, so a protected route through the hallway is the only way out. We sheet that route, cover the stair, and clear as we go rather than stockpiling in the garden.
Does a 1930s semi's chimney breast carry the floor as well as itself?
It can, and that is settled by inspection rather than assumed. In Bernards Heath, 740 dwellings, 28.2 per cent of that area's stock, were built between 1930 and 1939. In housing of that period, floor joists can bear into the breast and the stack above adds its own weight. The engineer we appoint establishes what the breast carries before designing the support that replaces it.
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