Build a mansard loft conversion in Sefton from £51,576

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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From £51,696

Last active Oct 26
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Robuild - Waterwise

Robuild - Waterwise is an established extension buildering business in Sefton. We come highly recommended and provide competitive quotes for your w...

From £51,848

Last active Oct 26
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S.L.P Property Maintenance

Need to find an Extension Builder near you for all your extension buildering work?

S.L.P Property Maintenance provides a local, trusted ext...

From £51,952

Last active Oct 26
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DW Brickwork

Trusted and professional extension builder in Sefton. Experienced in all extension buildering work and keeping within budget and on quote. DW Brick...

From £51,744

Last active Oct 26
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G J Builders Wirral

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

From £51,576

Last active Oct 26
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BTC Bernstef Ltd

BTC Bernstef Ltd is an established extension buildering business in Sefton. We come highly recommended and provide competitive quotes for your work...

From £51,672

Last active Oct 26
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J.M.C Building Services

J.M.C Building Services is a trusted extension builder serving customers in Sefton and the surrounding area. Contact us to today to get a competiti...

From £51,904

Last active Oct 26
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Bob the Builder

Need an Extension Builder in Sefton? Bob the Builder has been helping local clients (20 mile radius) with their extension buildering jobs for many ...

From £51,768

Last active Oct 26
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T&T Building Contractors

Thomas Healey

Need an Extension Builder in Sefton? T&T Building Contractors has been helping local clients (20 mile radius) with their extension buildering jobs ...

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 Sefton. No obligation free quo...

From £51,760

Last active Oct 26
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CJ Construction

CJ Construction are here to help customers who need an Extension Builder in Sefton. We offer a competitive rate to complete all your extension buil...

Mansard loft conversion cost in Sefton

Estimates for build a mansard loft conversion near Sefton

Mansard loft conversions range from the cheapest installation of £51,576 (BTC Bernstef Ltd based in L23) to the dearest of around £51,952 (DW Brickwork based in CH46).

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 Sefton by posting a job with HaMuch and we'll send it to extension builders in Sefton. 


Estimates for common extension builder jobs in Sefton;

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...