Chimney Breast Removal Radlett

Chimney stacks are named in Radlett's conservation area appraisal as part of what the designation exists to protect, so removing a breast here is a structural job with a heritage question attached. We appoint the engineer, support whatever stays up, and settle the consent position before a brick moves.

For Radlett, 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 Radlett.

How the job runs

1. Free site survey at your Radlett 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 Hertfordshire 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.

Why chimney stacks matter to Hertsmere in Radlett

Because their loss is recorded as a threat. The Radlett (North) Conservation Area Appraisal lists the removal of redundant chimney stacks among the alterations that pose a threat to the special character of the area. Radlett has two conservation areas, Radlett (North) and Radlett (South), and both were designated on 20 April 1988.

Radlett (North) covers Watling Street from number 197 south to the Radlett and Bushey Reform Synagogue, plus all of Park Road, Station Road, Upper Station Road, Malt Lane and Aldenham Road. It also takes in the residential area known as The Grove to the north west, Slade Court to the south, and parts of Newlands Avenue, Watford Road, The Crosspath, Gills Hill, Scrubbitts Park Road and Barn Close. If your address is on that list, what happens above the roofline is a different conversation from what happens to the breast inside.

Housing in Radlett

By the valuation list's count, Radlett holds about 3,500 homes, 76% houses and 24% flats; by age, 12% were built before 1919, 19% between the wars and 67% since 1945. Detached houses make up 47% of homes here, and a breast in a detached house in Radlett needs building control but no party wall notice.

What the stacks look like on Watling Street and Loom Lane

They are a designed feature rather than an accident of heating. In Character Zone 1, Watling Street, which is the High Street core of Radlett (North) Conservation Area, the appraisal records the prevalent chimney stacks as red brick, projecting above the roofline with chimney pots.

The original houses on Loom Lane share an Arts and Crafts influenced form of two storeys in brick and tile construction, with gables, chimneys, traditional glazing and pitched roofs. Where the stack is part of the composition, the route that keeps the elevation intact is to take the breast out at ground floor level and leave the stack in place above. That means the retained stack has to be supported, on a steel beam bearing onto padstones, which is now the usual route, or on gallows brackets only where the engineer and building control accept them. A stack is never left standing on nothing.

Breasts in the Cobden Hill and Station Road terraces

In a terrace the stack sits in masonry you share, and Cobden Hill shows the arithmetic. Numbers 5 to 15 Cobden Hill are a row of six red brick cottages of one and a half storeys, with hipped tile roofs and three large decorated chimney stacks. Numbers 17 to 23 Cobden Hill are a row of six red brick and pebble dashed two storey terraced houses, with hipped tile roofs, small end gables and three large chimney stacks. Three stacks serving six houses means the brickwork you are cutting into is doing work for the property next door as well.

The Radlett (North) Conservation Area Appraisal describes Station Road and Upper Station Road as late Victorian two storey terraces in stock brick with orange brick dressings, under slate roofs with decorative orange ridge tiles. Cutting a pocket into a shared wall to seat a beam, or fixing anything into it, is notifiable under the Party Wall etc. Act 1996. The notice is served by you as building owner. We flag it at survey, supply the structural detail your surveyor needs, and plan the works around the notice period.

Consent and sign off before anything comes out

Taking a whole stack down inside a conservation area is not automatically yours to do. Demolishing a building, or the principal part of a building, in one of Radlett's conservation areas needs planning permission from Hertsmere Borough Council before work starts. That is known as relevant demolition, and carrying it out without permission is a criminal offence. Hertsmere's conservation areas page still uses the older name for that consent, abolished in England on 1 October 2013. Whether a particular stack removal falls inside that depends on what is being taken down, so we put the question to the council rather than guess.

The support itself is a Building Regulations matter. Hertsmere Borough Council's planning and building control pages direct building control enquiries to Hertfordshire Building Control, a not for profit organisation contactable on 01438 879990. Removing a breast on one floor on a steel beam runs from £2,200 to £3,250, and from £1,500 to £2,500 where gallows brackets are accepted. Two floors runs from £3,000 to £5,000 (indicative London ranges, MyBuilder and Checkatrade, 2026).

• Ground floor removal with the upper stack fully supported
• Structural engineer's calculations arranged and followed
• Bedroom breast removal to reclaim usable floor space

VOA Council Tax stock of properties, March 2025, for Radlett. Counts rounded by the VOA.

For the wider picture around chimney breast removal in Radlett, see home renovation in Radlett, chimney breast removal in Borehamwood, how building control signs off a chimney breast removal, party walls and chimney breasts, our London chimney breast removal page and Chimney Stack Repair.

Why Radlett Homeowners Choose GS Renovation

A Radlett chimney breast job has three consent strands running at once, and we keep hold of all of them. The conservation area position is put to Hertsmere in writing, and the party wall obligation is flagged early with the structural detail your surveyor will want. The support itself is designed by the engineer we appoint and inspected by building control. Redundant flues are capped and vented rather than sealed, so nothing comes back through the new plaster later. We are fully insured and quotations are free and carry no obligation.

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.