chimney sweep and repair in Greater London (180)

Chimney problems are easy to ignore – until water starts leaking, bricks crumble, or your fireplace becomes unsafe to use.

Whether your chimney needs repointing, lead flashing repairs, or more extensive work, acting early can help prevent costly damage to your roof and home.

Read on for everything you need to know about finding and hiring experienced tradespeople for your chimney’s repair covering London.

Rather we do the searching for you? Try our quick request a quote feature, and we’ll put you in touch with chimney repair specialists covering your local area.

How much does a chimney's repair cost in London?

Expect to pay between £624 and £1613 , with an average cost of £993.

That said, a chimney’s repair cost can vary depending on the:

• Type of damage
• Ease of access
• Whether scaffolding is needed

Tip: If the chimney is shared (for example, on a party wall), make sure to get any costs agreed with your neighbours before work begins.

What are common chimney problems?

Chimneys are exposed to wind, rain, and temperature changes year-round, which leads to wear and tear.

Typical chimney problems include:

• Cracked or missing mortar
• Loose or spalling bricks
• Leaking lead flashing
• Damaged chimney pots or cowls
• Water ingress causing damp patches
• Leaning or unstable chimney stacks

Many of these issues are fixable if addressed promptly with the help of an experienced chimney repairer.

What are the signs of chimney damage?

Some chimney problems are visible from the ground, while others appear inside your home.

Common warning signs to look out for include:

• Damp patches or staining on chimney breasts
• Crumbling mortar or loose bricks
• White staining (efflorescence) on brickwork
• Rusting fireplace components
• Water dripping into the fireplace during heavy rain

If you notice any of these, hire a chimney specialist to take a look.

Tip: Is the list of repairs stacking up for a chimney that you don’t tend to use much anyway? Chimney removal might be worth considering.

Check out our chimney removal cost guide for a rundown on prices.

Can an old chimney be repaired?

Yes, most old chimneys can be repaired rather than replaced. Repair options often include:

• Repointing
• Replacing damaged bricks
• Renewing flashing
• Rebuilding the chimney stack above roof level

Complete removal or full rebuild is usually only needed if the structure is unsafe.

A chimney repair specialist can advise whether repair or replacement is the most cost-effective option.

Is it expensive to repair a chimney?

Chimney repairs don’t have to be expensive if problems are caught early.

Small jobs like repointing or replacing flashing are far cheaper than structural rebuilds.

However, ignoring issues such as loose mortar or leaks can lead to internal damp, roof damage, and higher repair bills later.

Is professional chimney repair worth it?

Yes – professional chimney repair is an important investment.

While a DIY fix may be tempting to save on costs, chimney work can be dangerous and complex.

Hire an experienced chimney repairer and they’ll:

• Accurately diagnose the problem using specialist CCTV cameras (if necessary)
• Work safely at height with proper equipment and insurance
• Provide long-lasting repairs that help protect your roof and interior
• Give their expert advice on whether repair, partial rebuild, or replacement is the best option

Why use Checkatrade?

• Fully checked tradespeople covering your local area
• Insurance always listed
• Easy to compare multiple profiles
• Handy reviews from local customers
• Covered by the Checkatrade Guarantee (T&Cs apply)