Build a mansard loft conversion in Plymouth from £51,480

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 £52,128

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Trevillion Property Services Ltd

Stephen Trevillion

Member since October 2026

Location

Plymouth, PL6

Minor and major building works

From £51,712

Last active Oct 26
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PLATINUM CONSTRUCTION

Gary Ede

Location

Plymouth, PL7

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

PLATINUM CONSTRUCTION provides a local, trusted extensio...

From £51,712

Last active Oct 26
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Kiwi Construction

Patrick Rule

Location

Plymouth, PL5

Trading since 1997 kitchens,bathrooms lofts patios roof work and much more

From £51,480

Last active Sep 26
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Donovan Construction

Matthew Donovan

Location

Plymouth, PL6

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

Donovan Construction provides a local, trusted extensio...

From £52,424

Last active Sep 26
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JAVA CONSTRUCTION LTD

Luis Escrig

Location

Plymouth, PL7

Java construction 

provide a complete building service and design

we also provide building maitanance 

w...

From £51,768

Last active Sep 26
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NCN Building & Maintenance Ltd

Location

Plymouth, PL2

Need an Extension Builder in Plymouth? NCN Building & Maintenance Ltd has been helping local clients (20 mile radius) with their extension builderi...

From £52,016

Last active Aug 26
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Bob Jones Installations

Rob Jones

Location

Plymouth, PL1

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

From £52,112

Last active Jul 26
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GD ANDREW BUILDING CONTRACTORS

Relax... you have found a reliable extension builder in Plymouth. GD ANDREW BUILDING CONTRACTORS is a friendly and reliable company based in Plymou...

From £51,880

Last active Jul 26
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M D C Building Services

Location

Plymouth, PL3

Relax... you have found a reliable extension builder in Plymouth. M D C Building Services is a friendly and reliable company based in Plymouth who ...

From £51,664

Last active Mar 26
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MJR Construction SW Ltd

Location

Plymouth, PL6

Relax... you have found a reliable extension builder in Plymouth. MJR Construction SW Ltd is a friendly and reliable company based in Plymouth who ...

Mansard loft conversion cost in Plymouth

Estimates for build a mansard loft conversion near Plymouth

Mansard loft conversions range from the cheapest installation of £51,480 (Donovan Construction based in PL6) to the dearest of around £52,424 (JAVA CONSTRUCTION LTD based in PL7).

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


Estimates for common extension builder jobs in Plymouth;

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...