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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 £51,000
Banga Decoration
Sebastian Banga
Member since August 2025
Banga decoration. Is Base in south London for number of year Banga decoration is a small company. Wich provide an excellent job to the custom...
Buci builders ltd
Robert Buci
Buci builders ltd is a trusted extension builder serving customers in Dulwich and the surrounding area. Contact us to today to get a competitive qu...
RCB Group Design & Build
Vasi J
Dulwich London, SE21
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
PW Construction & Renovation Ltd
PW Construction & Renovation Ltd is a trusted extension builder serving customers in Dulwich and the surrounding area. Contact us to today to get a...
The Perfectionist
Experienced extension builder ready to quote for your work. The Perfectionist is the best extension builder in Dulwich. No obligation free quotes a...
Glenn Miller Builders Limited
Glenn Miller
Relax... you have found a reliable extension builder in Dulwich. Glenn Miller Builders Limited is a friendly and reliable company based in Dulwich ...
PRM BUILDING
Relax... you have found a reliable extension builder in Dulwich. PRM BUILDING is a friendly and reliable company based in Dulwich who consider no j...
RAJANIS CONSTRUCTION
Relax... you have found a reliable extension builder in Dulwich. RAJANIS CONSTRUCTION is a friendly and reliable company based in Dulwich who consi...
Local Building Services
Trusted and professional extension builder in Dulwich. Experienced in all extension buildering work and keeping within budget and on quote. Local B...
Cheapest builders to convert your basement in Dulwich
Comparing extension builders estimates for a Convert a basement 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 to convert a basement in Dulwich by posting a job with HaMuch and we will send it to extension builders in Dulwich.
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Estimates for common extension builder jobs in Dulwich;
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 - £17,846
Two storey extension - £88,518
Build a timber frame extension - £26,346
Build a swimming pool - £81,346
Single storey extension - £61,912
Side return extension - £45,388
Install an RSJ - £2,546
Outbuilding - £10,346
Build a Mansard loft conversion - £52,346
Loft conversion - £36,990
Build a kitchen extension - £42,346
Hip to gable loft conversion - £42,346
Granny annexe - £87,346
Garden office - £10,346
Convert a Garage - £16,346
Garage - £18,846
Build a flat roof extension - £22,346
Build a dormer loft conversion - £42,346
Concrete foundations - £6,596
Convert a bungalow loft - £29,346
Convert a basement - £41,388