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Vasi J
No Call out charges!
All Jobs Fully Insured and Guaranteed !!!
All aspects of Plumbing, Heating and Drains....
..."I am very pleased with the work carried out. All very clear and transparent." - ROMFORD,reviewed 10/01/18, KELLY
Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in SE22. No obligation free quotes and ...
Trusted and professional extension builder in SE22. Experienced in all extension buildering work and keeping within budget and on quote. Vidanov Bu...
DUWIX BUILDING MAINTENANCE are here to help customers who need an Extension Builder in SE22. We offer a competitive rate to complete all your exten...
Peter Cesma
Experienced builder in all aspects of building works. All work guaranteed. Quality finish, promt ,honest and reliable services. Public liabil...
Quality Carpentry is a trusted extension builder serving customers in SE22 and the surrounding area. Contact us to today to get a competitive quote...
South East Builders are here to help customers who need an Extension Builder in SE22. We offer a competitive rate to complete all your extension bu...
From £41,880
FRIERN BUILDING LTD is an established extension buildering business in SE22. We come highly recommended and provide competitive quotes for your wor...
From £42,272
East Dulwich, SE22
BERNARD CONSTRUCTION LTD are here to help customers who need an Extension Builder in SE22. We offer a competitive rate to complete all your extensi...
From £46,048
Chris Ellis
Based in Camberwell south east London we provide a turnkey service for Domestic and Commercial construction Projects from conception to compl...

In SE22, prices for dormer loft conversions range from £41,880 (FRIERN BUILDING LTD based in SE22) to £46,048 (Chris Ellis Project Service based in SE5), 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 SE22. 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 - £17,998

Two storey extension - £88,748

Build a timber frame extension - £26,498

Build a swimming pool - £81,498

Single storey extension - £64,968

Side return extension - £47,107

Install an RSJ - £2,698

Outbuilding - £10,498

Build a Mansard loft conversion - £52,498

Loft conversion - £38,423

Build a kitchen extension - £42,498

Hip to gable loft conversion - £42,498

Granny annexe - £87,498

Garden office - £10,498

Convert a Garage - £16,498

Garage - £18,998

Build a flat roof extension - £22,498

Build a dormer loft conversion - £42,498

Concrete foundations - £6,748

Convert a bungalow loft - £29,498

Convert a basement - £43,107