Add extra space to your Knowsley home from £41,608

Dormer loft conversions are ideal if you want to add lots of extra space to your home. Adding a box-like structure or structures to the roof, you essentially extend the roofline to add significant square footage to your loft space. This makes dormer loft conversions one of the most popular loft conversion types, as they're ideal for adding a new main bedroom with en-suite or even a self-contained living space. To see prices and availability for your job click green button.

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From £41,976

Last active Nov 26
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Nathan Thomas Plumbing

Nathan Thomas

Nathan Thomas Plumbing is an established extension buildering business in Knowsley. We come highly recommended and provide competitive quotes for y...

From £41,936

Last active Nov 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 Knowsley. No obligation free q...

From £41,672

Last active Nov 26
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J.M.C Building Services

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

From £41,768

Last active Nov 26
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KM Building Services

Relax... you have found a reliable extension builder in Knowsley. KM Building Services is a friendly and reliable company based in Knowsley who con...

From £41,872

Last active Nov 26
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G. Finnigan Builders

G. Finnigan Builders is an established extension buildering business in Knowsley. We come highly recommended and provide competitive quotes for you...

From £41,704

Last active Nov 26
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Render & External Insulation Specialist

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

From £41,904

Last active Nov 26
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Bob the Builder

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

From £41,824

Last active Nov 26
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Warrington Builders

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

From £41,664

Last active Nov 26
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KMC Brickwork

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

From £41,608

Last active Nov 26
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M L R Building Services

Mark Robinson

Trusted and professional extension builder in Knowsley. Experienced in all extension buildering work and keeping within budget and on quote. M L R ...

Cost of dormer loft conversions in Knowsley

Estimates for build a dormer loft conversion near Knowsley

In Knowsley, prices for dormer loft conversions range from £41,608 (M L R Building Services based in WA11) to £41,976 (Nathan Thomas Plumbing based in L19), but how much your conversion costs will vary depending on the size of your property, how easy access to your roof is and what you want to use the space for. 

The best way to get an accurate price is to compare quotes from extension builders in Knowsley. Post your job on HaMuch now and we'll put you in touch with available extension builders.

"Dormer loft conversion" - ST HELENS, job posted 10/02/25


Estimates for common extension builder jobs in Knowsley;

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.

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