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Kunshi Services UK Ltd
Kunshi Services UK Ltd is a trusted extension builder serving customers in SE28 and the surrounding area. Contact us to today to get a competitive ...
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...
Liviu Toma
Experienced extension builder ready to quote for your work. Liviu Toma is the best extension builder in SE28. No obligation free quotes and many ha...
JASPG Construction & Design
JASPG excel in finding investment opportunities, working together with clients and partners to achieve optimal results. We project manage from star...
From £36,150
Great britton builders
David Britton
London, SE28
Relax... you have found a reliable extension builder in SE28. Great britton builders is a friendly and reliable company based in SE28 who consider ...
From £36,450
C B BUILDING CONSTRUCTION
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £35,250
RSM BUILDING CONTRACTORS
Relax... you have found a reliable extension builder in SE28. RSM BUILDING CONTRACTORS is a friendly and reliable company based in SE28 who conside...
From £33,000
Keane & Sons Paving
Keane & Sons Paving is an established and experienced local extension builder in SE28. Please contact us for a free, no obligation quote and compet...
From £33,375
Satau Construction Works Ltd
Thamesmead, SE28
Satau Construction Works Ltd is an established and experienced local extension builder in SE28. Please contact us for a free, no obligation quote a...
From £35,475
R H Multitrade
Relax... you have found a reliable extension builder in SE28. R H Multitrade is a friendly and reliable company based in SE28 who consider no job a...
Cheapest builders for loft conversion in SE28
Comparing extension builders estimates for Loft conversion gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost of a loft conversion in SE28 by posting your job to extension builders in SE28.
"Loft conversion" - ERITH, job posted 08/09/25
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Estimates for common extension builder jobs in SE28;
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.
Underpin a building - £17,702
Two storey extension - £88,304
Build a timber frame extension - £26,202
Build a swimming pool - £81,202
Single storey extension - £59,048
Side return extension - £43,777
Install an RSJ - £2,402
Outbuilding - £10,202
Build a Mansard loft conversion - £52,202
Loft conversion - £35,648
Build a kitchen extension - £42,202
Hip to gable loft conversion - £42,202
Granny annexe - £87,202
Garden office - £10,202
Convert a Garage - £16,202
Garage - £18,702
Build a flat roof extension - £22,202
Build a dormer loft conversion - £42,202
Concrete foundations - £6,452
Convert a bungalow loft - £29,202
Convert a basement - £39,777