Add extra space to your SE21 home from £41,984

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 £43,024

Last active Nov 26
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Buci builders ltd

Robert Buci

Buci builders ltd is a trusted extension builder serving customers in SE21 and the surrounding area. Contact us to today to get a competitive quote...

From £42,144

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 £41,984

Last active Oct 26

2 reviews

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RCB Group Design & Build

Vasi J

Location

London, SE21

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

From £42,040

Last active Oct 26
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PW Construction & Renovation Ltd

PW Construction & Renovation Ltd is a trusted extension builder serving customers in SE21 and the surrounding area. Contact us to today to get a co...

From £42,056

Last active Oct 26
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The Perfectionist

Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in SE21. No obligation free quotes and ...

From £42,208

Last active Sep 26
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Vidanov Building Services

Trusted and professional extension builder in SE21. Experienced in all extension buildering work and keeping within budget and on quote. Vidanov Bu...

From £42,080

Last active Jul 26
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Quality Carpentry

Quality Carpentry is a trusted extension builder serving customers in SE21 and the surrounding area. Contact us to today to get a competitive quote...

From £42,264

Last active May 26
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Complete Construction London Limited

Complete Construction London Limited is a trusted extension builder serving customers in SE21 and the surrounding area. Contact us to today to get ...

From £42,024

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Exquisite Touch

Relax... you have found a reliable extension builder in SE21. Exquisite Touch is a friendly and reliable company based in SE21 who consider no job ...

From £42,432

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Universal Plastering Ltd

We are a family run local business that was founded in 2007. Universal Plastering Ltd provides a wide variety of building and plastering services i...

Cost of dormer loft conversions in SE21

Estimates for build a dormer loft conversion near SE21

In SE21, prices for dormer loft conversions range from £41,984 (RCB Group Design & Build based in SE21) to £43,024 (Buci builders ltd based in SE27), 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 SE21. Post your job on HaMuch now and we'll put you in touch with available extension builders.


Estimates for common extension builder jobs in SE21;

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...