Build a mansard loft conversion in SM5 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.

HaMuch is Excellent

How HaMuch saves you money

Post your job for free

Post your job for free

We send your job to ALL SM5 extension builders

Compare quotes

Compare quotes

Available extension builders in SM5 reply

Save Money

Save Money

Select your affordable SM5 extension builder

Post your job

From £52,080

Last active Oct 26
Get quotes

D & R Roofing & Loft Conversions, Building & Design

Relax... you have found a reliable extension builder in SM5. D & R Roofing & Loft Conversions, Building & Design is a friendly and reliable company...

From £52,504

Last active Oct 26
Get quotes

CSJ Building Services

Trusted and professional extension builder in SM5. Experienced in all extension buildering work and keeping within budget and on quote. CSJ Buildin...

From £51,936

Last active Oct 26
Get quotes

Masters Property Services

Location

Carshalton, SM5

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

From £52,080

Last active Jul 26
Get quotes

HELIX BUILDING SOLUTIONS LTD

Experienced extension builder ready to quote for your work. HELIX BUILDING SOLUTIONS LTD is the best extension builder in SM5. No obligation free q...

From £51,960

Last active Jun 26
Get quotes

NCN Projects

Experienced extension builder ready to quote for your work. NCN Projects is the best extension builder in SM5. No obligation free quotes and many h...

From £52,160

Last active May 26
Get quotes

REA CONSTRUCTION LTD

REA CONSTRUCTION LTD are here to help customers who need an Extension Builder in SM5. We offer a competitive rate to complete all your extension bu...

From £51,976

Last active Feb 26
Get quotes

Lee Builders & Decorators

Trusted and professional extension builder in SM5. Experienced in all extension buildering work and keeping within budget and on quote. Lee Builder...

From £52,104

Last active Dec 25
Get quotes

Rayner & Cook Building Services

Experienced extension builder ready to quote for your work. Rayner & Cook Building Services is the best extension builder in SM5. No obligation fre...

From £52,384

Last active Nov 25
Get quotes

UK Services & Supplies Ltd

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

UK Services & Supplies Ltd provides a local, trusted ext...

From £51,928

Last active Nov 25
Get quotes

BROMLEY TIMBER AND BUILDERS ME

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

BROMLEY TIMBER AND BUILDERS ME provides a local, trusted...

Mansard loft conversion cost in SM5

Estimates for build a mansard loft conversion near SM5

Mansard loft conversions range from the cheapest installation of £51,928 (BROMLEY TIMBER AND BUILDERS ME based in CR0) to the dearest of around £52,504 (CSJ Building Services based in SM1).

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 SM5 by posting a job with HaMuch and we'll send it to extension builders in SM5. 


Estimates for common extension builder jobs in SM5;

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...