Extend your Dorchester with an extension

A flat roof extension is a great way to add extra space to your home without splashing out on the costs of a pitched roof extension. Often exempt from planning permission rules, you can build a flat roof extension up to 3 metres in height as long as it's not visible from a road. But how much do they cost in Dorchester? To see prices and availability for your job click green button.

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From £21,472

Last active Nov 26
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WEYMOUTH ROOFING CO.

WEYMOUTH ROOFING CO. is an established and experienced local extension builder in Dorchester. Please contact us for a free, no obligation quote and...

From £22,192

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J FLANN BUILDING & MAINTENANCE

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

J FLANN BUILDING & MAINTENANCE provides a local, trusted...

From £21,896

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Steven Clark Building Services

Location

Dorchester, DT1

Steven Clark Building Services is an established and experienced local extension builder in Dorchester. Please contact us for a free, no obligation...

From £22,032

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Design Properties & Renovations

Design Properties & Renovations is an established and experienced local extension builder in Dorchester. Please contact us for a free, no obligatio...

From £22,536

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Roofix and Build Ltd

Our building services company Roofix and Build Ltd have twenty years experience of helping customers in Weymouth and the surrounding area by provid...

From £22,008

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Harbour Property Improvements Limited

We are a small business priding oueselves on high quality works carried out with care and attention. We use a select few subcontractors to help com...

From £21,496

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Dorset Build & Maintenance Company Limited

Richard Gracie

Location

Dorchester, DT2

We are Dorset Build & Maintenance Company Ltd. We are a medium sized local building and maintenance contractor, and our work area is prima...

From £21,696

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Stuart's Building and Maintenance

Stuart Lambert

Trusted and professional extension builder in Dorchester. Experienced in all extension buildering work and keeping within budget and on quote. Stua...

From £21,560

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Poundbury Build and Maintenance

Joanne Upshall

Location

Dorchester, DT1

We are a locl fun family business with over 20 years experience.  We specialise in all aspects of the building trade, no job too big or too sm...

From £22,536

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Chris Larner building services

Chris Larner building services is a trusted extension builder serving customers in Dorchester and the surrounding area. Contact us to today to get ...

Flat roof extension cost in Dorchester

Estimates for build a flat roof extension near Dorchester

A flat roof extension ranges from the cheapest of £21,472 (WEYMOUTH ROOFING CO. based in DT4) to the dearest of £22,536 (Roofix and Build Ltd based in DT4), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes. 

Find out how much your flat roof extension will cost in Dorchester by posting a job with HaMuch. We'll send it to extension builders in Dorchester.


Estimates for common extension builder jobs in Dorchester;

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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