Build a mansard loft conversion in St Helens from £51,552

Mansard loft conversions are ideal if you want to maximise the space in your home. Extending your roof out into a flat roof with an almost vertical wall, they almost always require planning permission but can add significant value to your home. To see prices and availability for your job click green button.

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Build a Mansard loft conversion cost in St Helens - Sort by rates or availability

From £51,824

Last active Oct 26
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Warrington Builders

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

From £51,672

Last active Oct 26
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Fixit Cheshire

Fixit Cheshire is an established and experienced local extension builder in St Helens. Please contact us for a free, no obligation quote and compet...

From £51,664

Last active Oct 26
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KMC Brickwork

Need an Extension Builder in St Helens? KMC Brickwork has been helping local clients (20 mile radius) with their extension buildering jobs for many...

From £51,608

Last active Oct 26
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M L R Building Services

Mark Robinson

Trusted and professional extension builder in St Helens. Experienced in all extension buildering work and keeping within budget and on quote. M L R...

From £51,872

Last active Oct 26
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G. Finnigan Builders

G. Finnigan Builders is an established extension buildering business in St Helens. We come highly recommended and provide competitive quotes for yo...

From £51,600

Last active Oct 26
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SPL Building Services

Stephen Lowe

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

From £51,776

Last active Oct 26
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Jc Properties

Relax... you have found a reliable extension builder in St Helens. Jc Properties is a friendly and reliable company based in St Helens who consider...

From £51,936

Last active Oct 26
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P & P Building Services

Peter Gallagher

Experienced extension builder ready to quote for your work. P & P Building Services is the best extension builder in St Helens. No obligation free ...

From £51,552

Last active Oct 26
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Liverpool Builder

Liverpool Builder is an established extension buildering business in St Helens. We come highly recommended and provide competitive quotes for your ...

From £51,704

Last active Oct 26
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Render & External Insulation Specialist

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Mansard loft conversion cost in St Helens

Estimates for build a mansard loft conversion near St Helens

Mansard loft conversions range from the cheapest installation of £51,552 (Liverpool Builder based in L12) to the dearest of around £51,936 (P & P Building Services based in L11).

While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.

Get quotes to install a mansard loft conversion in St Helens by posting a job with HaMuch and we'll send it to extension builders in St Helens. 


Estimates for common extension builder jobs in St Helens;

Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

More extensions & conversions cost guides...