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J&J Building Solutions
Streatham, SW16
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in SW16. No obligation free quotes...
From £7,450
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 SW16 and the surrounding area. Contact us to today to get a competitive quote...
Greens Gardening & Landscape Property Maintenance
John Mcdonagh
Watch our short video highlighting all our expertise and services here:
more than 10 y...
Langston Builders
Langston Builders is a trusted extension builder serving customers in SW16 and the surrounding area. Contact us to today to get a competitive quote...
Tenfold Renovation
Tenfold Renovation
Need to find an Extension Builder near you for all your extension buildering work?
Tenfold Renovation provides a local, trusted extension b...
RCB Group Design & Build
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
PW Construction & Renovation Ltd
PW Construction & Renovation Ltd is a trusted extension builder serving customers in SW16 and the surrounding area. Contact us to today to get a co...
PRM BUILDING
Streatham, SW16
Relax... you have found a reliable extension builder in SW16. PRM BUILDING is a friendly and reliable company based in SW16 who consider no job as ...
QSA Builders Ltd
QSA Builders Ltd are here to help customers who need an Extension Builder in SW16. We offer a competitive rate to complete all your extension build...
Concrete foundation costs in SW16
Concrete foundations range from the £6,234 (RCB Group Design & Build based in SE21) to £7,450 (Banga Decoration based in CR7) in SW16.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Find out the exact cost of laying concrete foundations in SW16 by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
- How much do foundations cost in the UK?
- What factors affect the cost of concrete foundations?
- What is the difference between a trench and a strip foundation?
- What is the difference between a concrete slab and a foundation?
- What is the minimum depth for a concrete foundation?
- Can I pour my own foundation?
- Can I pour my own concrete slab?
- How do you put a new foundation under an existing house?
Get extension builder rates instantly
Estimates for common extension builder jobs in SW16;
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 - £17,838
Two storey extension - £88,508
Build a timber frame extension - £26,338
Build a swimming pool - £81,338
Single storey extension - £61,768
Side return extension - £45,307
Install an RSJ - £2,538
Outbuilding - £10,338
Build a Mansard loft conversion - £52,338
Loft conversion - £36,923
Build a kitchen extension - £42,338
Hip to gable loft conversion - £42,338
Granny annexe - £87,338
Garden office - £10,338
Convert a Garage - £16,338
Garage - £18,838
Build a flat roof extension - £22,338
Build a dormer loft conversion - £42,338
Concrete foundations - £6,588
Convert a bungalow loft - £29,338
Convert a basement - £41,307