One of the most common questions homeowners ask during renovations is:

“Can I remove a chimney breast without removing the chimney stack?”

In many cases, yes — but the remaining chimney stack above must still be properly supported after the chimney breast below is removed.

This is extremely important because chimney breasts and chimney stacks are often part of the structural makeup of older properties.

Many homeowners remove chimney breasts to create more floor space, improve room layouts or modernise older homes. Removing the breast can make a room feel noticeably larger, especially in terraced and semi-detached properties where chimney structures can take up significant space.

However, simply removing the lower section without supporting the masonry above can create serious structural risks.

When a chimney breast is removed downstairs but the chimney stack remains above, structural support is usually required to safely carry the weight of the remaining chimney structure.

In some cases, gallows brackets may be used, although this depends on the property type, neighbouring walls and local building control requirements.

In many situations, steel beam support is the preferred or required solution.

A structural engineer will normally assess the property and specify the safest support method based on the condition and layout of the chimney structure.

Building regulations approval is also usually required before work begins.

Many homeowners are surprised to learn that chimney breast removal is considered structural work even if only part of the chimney is being removed internally.

The process typically involves carefully removing sections of the chimney breast, installing structural supports and ensuring the remaining masonry is fully secure and compliant.

The cost of removing a chimney breast while retaining the chimney stack can vary depending on the support required, accessibility and the amount of masonry being removed.

Smaller projects may start from around £2,000 to £4,000, while more complex structural support work can exceed £5,000+ depending on the property and engineering involved.

Older properties can sometimes reveal hidden structural complications during the work, which is why experienced structural contractors are essential for projects like these.

At Structural Projects North West, we specialise in chimney breast removals, RSJ installations and structural alterations across Manchester and the North West.

We regularly work alongside structural engineers and building control to ensure chimney structures are altered safely and professionally while maintaining the integrity of the property. Our experienced team helps homeowners understand the structural process clearly and safely from start to finish.

If you’re considering removing a chimney breast and want expert advice on structural support options and the safest approach for your property, contact Structural Projects North West today to discuss your project.