Build a mansard loft conversion in SE20 from £51,568

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 £52,144

Last active Nov 26
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Greens Gardening & Landscape Property Maintenance

John Mcdonagh

Watch our short video highlighting all our expertise and services here:

more than 10 y...

From £51,992

Last active Oct 26
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Cre8tive Contractors Ltd

Cre8tive Contractors Ltd are here to help customers who need an Extension Builder in SE20. We offer a competitive rate to complete all your extensi...

From £51,984

Last active Oct 26

2 reviews

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RCB Group Design & Build

Vasi J

No Call out charges! 

All Jobs Fully Insured and Guaranteed !!!

All aspects of Plumbing, Heating and Drains....

...

"I am very pleased with the work carried out. All very clear and transparent." - ROMFORD,reviewed 10/01/18, KELLY

From £52,344

Last active Oct 26
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Glenn Miller Builders Limited

Glenn Miller

Relax... you have found a reliable extension builder in SE20. Glenn Miller Builders Limited is a friendly and reliable company based in SE20 who co...

From £52,296

Last active Sep 26
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Aviemore Building Contractors Ltd

Experienced extension builder ready to quote for your work. Aviemore Building Contractors Ltd is the best extension builder in SE20. No obligation ...

From £51,568

Last active Sep 26
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Oaksure Construction

Stuart Bogazzi

Working as a builder for over 20 years now.

Family run business 

Can sort any problem out and help build your dreams.

From £52,256

Last active Sep 26
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Bhagtana & Co Construction

Experienced extension builder ready to quote for your work. Bhagtana & Co Construction is the best extension builder in SE20. No obligation free qu...

From £52,184

Last active Aug 26
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K S BUILDERS (UK) LTD

Trusted and professional extension builder in SE20. Experienced in all extension buildering work and keeping within budget and on quote. K S BUILDE...

From £52,240

Last active Aug 26
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VDL Construction Ltd

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

VDL Construction Ltd provides a local, trusted extension...

From £51,952

Last active Aug 26
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A & P Master Construction

Experienced extension builder ready to quote for your work. A & P Master Construction is the best extension builder in SE20. No obligation free quo...

Mansard loft conversion cost in SE20

Estimates for build a mansard loft conversion near SE20

Mansard loft conversions range from the cheapest installation of £51,568 (Oaksure Construction based in CR0) to the dearest of around £52,344 (Glenn Miller Builders Limited based in BR3).

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 SE20 by posting a job with HaMuch and we'll send it to extension builders in SE20. 


Estimates for common extension builder jobs in SE20;

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...