Build a mansard loft conversion in W11 from £51,928

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 £52,096

Last active Nov 26
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Mr

Jonathan Rimmer

Experienced extension builder ready to quote for your work. Mr is the best extension builder in W11. No obligation free quotes and many happy custo...

From £51,928

Last active Nov 26
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BPS Building

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

From £53,840

Last active Nov 26
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1st & 2nd Fix Vasconstruct

Vas Constructs

RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...

From £52,360

Last active Oct 26
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M & A UK Ltd

Relax... you have found a reliable extension builder in W11. M & A UK Ltd is a friendly and reliable company based in W11 who consider no job as to...

From £52,168

Last active Oct 26
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Newpark Construction

Newpark Construction are here to help customers who need an Extension Builder in W11. We offer a competitive rate to complete all your extension bu...

From £52,024

Last active Sep 26
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HUGHES BUILDERS

Experienced extension builder ready to quote for your work. HUGHES BUILDERS is the best extension builder in W11. No obligation free quotes and man...

From £52,168

Last active Sep 26
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Heaven Sent Construction

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

Heaven Sent Construction provides a local, trusted exten...

From £52,600

Last active Apr 26
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H G Builders

H G Builders is an established and experienced local extension builder in W11. Please contact us for a free, no obligation quote and competitive ra...

From £52,224

Last active Apr 26
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Graham Construction

Graham Construction is an established extension buildering business in W11. We come highly recommended and provide competitive quotes for your work...

From £52,048

Last active Mar 26
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JNJ Building Services Ltd

Experienced extension builder ready to quote for your work. JNJ Building Services Ltd is the best extension builder in W11. No obligation free quot...

Mansard loft conversion cost in W11

Estimates for build a mansard loft conversion near W11

Mansard loft conversions range from the cheapest installation of £51,928 (BPS Building based in NW6) to the dearest of around £53,840 (1st & 2nd Fix Vasconstruct based in W12).

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 W11 by posting a job with HaMuch and we'll send it to extension builders in W11. 

"Mansard loft conversion" - SHEPHERD'S BUSH, job posted 01/01/70


Estimates for common extension builder jobs in W11;

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...