From £42,424
Elephant & Castle, SE17
AAA Design Decorators are here to help customers who need an Extension Builder in SE17. We offer a competitive rate to complete all your extension ...
From £42,024
Need to find an Extension Builder near you for all your extension buildering work?
AGRI CONSTRUCTION provides a local, trusted extension bu...
From £42,296
Need an Extension Builder in SE17? GILL BUILDING CONTRACTORS has been helping local clients (5 mile radius) with their extension buildering jobs fo...
From £42,256
DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in SE17. We offer a competitive rate to complete all your exten...
From £42,296
Catch-all residential & commercial property maintenance and management service including intelligent A/V installation, We've focussed on SE1 for 8 ...
From £42,488
Need an Extension Builder in SE17? Oxus Construction has been helping local clients (5 mile radius) with their extension buildering jobs for many y...
From £41,880
Trusted and professional extension builder in SE17. Experienced in all extension buildering work and keeping within budget and on quote. D & S CONS...
From £42,456
Need to find an Extension Builder near you for all your extension buildering work?
Ask Building provides a local, trusted extension builder...
From £42,176
At Home Tranformers Ltd we have been fitting bespoke bathrooms for over 10 years. We pride ourselves on being the go-to bathroom fitters for discer...
From £42,384
Propia Limited is an established and experienced local extension builder in SE17. Please contact us for a free, no obligation quote and competitive...

In SE17, prices for dormer loft conversions range from £41,880 (D & S CONSTRUCTION LTD based in SE1) to £42,488 (Oxus Construction based in SE15), 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 SE17. Post your job on HaMuch now and we'll put you in touch with available extension builders.
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 - £17,768

Two storey extension - £88,402

Build a timber frame extension - £26,268

Build a swimming pool - £81,268

Single storey extension - £60,360

Side return extension - £44,515

Install an RSJ - £2,468

Outbuilding - £10,268

Build a Mansard loft conversion - £52,268

Loft conversion - £36,263

Build a kitchen extension - £42,268

Hip to gable loft conversion - £42,268

Granny annexe - £87,268

Garden office - £10,268

Convert a Garage - £16,268

Garage - £18,768

Build a flat roof extension - £22,268

Build a dormer loft conversion - £42,268

Concrete foundations - £6,518

Convert a bungalow loft - £29,268

Convert a basement - £40,515