Add extra space to your Thamesmead home from £41,880

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 £41,880

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Can design and Construction

Erald Kanani

Member since August 2025

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

From £42,168

Last active Nov 26
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Sevcan Construction

Relax... you have found a reliable extension builder in Thamesmead. Sevcan Construction is a friendly and reliable company based in Thamesmead who ...

From £42,272

Last active Nov 26
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Kunshi Services UK Ltd

Kunshi Services UK Ltd is a trusted extension builder serving customers in Thamesmead and the surrounding area. Contact us to today to get a compet...

From £42,616

Last active Oct 26
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HOUSE BUILDING SERVICES LIMITED

Tommy House

HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in Thamesmead and the surrounding area. Contact us to today to get...

From £42,368

Last active Oct 26
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MONOLITH CONSTRUCTION LTD

Need an Extension Builder in Thamesmead? MONOLITH CONSTRUCTION LTD has been helping local clients (10 mile radius) with their extension buildering ...

From £42,344

Last active Oct 26
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Buildem Ltd

Buildem Ltd is a trusted extension builder serving customers in Thamesmead and the surrounding area. Contact us to today to get a competitive quote...

From £42,200

Last active Sep 26
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Derryard Construction Ltd

Relax... you have found a reliable extension builder in Thamesmead. Derryard Construction Ltd is a friendly and reliable company based in Thamesmea...

From £42,088

Last active Sep 26
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AM Builder

Trusted and professional extension builder in Thamesmead. Experienced in all extension buildering work and keeping within budget and on quote. AM B...

From £42,248

Last active Sep 26
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PFM General Building Services Ltd

Philip Boateg

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

PFM General Building Services Ltd provides a local, trus...

From £42,216

Last active Sep 26
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Liviu Toma

Experienced extension builder ready to quote for your work. Liviu Toma is the best extension builder in Thamesmead. No obligation free quotes and m...

Cost of dormer loft conversions in Thamesmead

Estimates for build a dormer loft conversion near Thamesmead

In Thamesmead, prices for dormer loft conversions range from £41,880 (Can design and Construction based in Ig11) to £42,616 (HOUSE BUILDING SERVICES LIMITED based in DA16), 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 Thamesmead. Post your job on HaMuch now and we'll put you in touch with available extension builders.

"Dormer loft conversion" - THAMESMEAD, job posted 01/01/70


Estimates for common extension builder jobs in Thamesmead;

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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