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John Mcdonagh
Watch our short video highlighting all our expertise and services here:
more than 10 y...
Cre8tive Contractors Ltd are here to help customers who need an Extension Builder in SE20. We offer a competitive rate to complete all your extensi...
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
Glenn Miller
Relax... you have found a reliable extension builder in SE20. Glenn Miller Builders Limited is a friendly and reliable company based in SE20 who co...
Experienced extension builder ready to quote for your work. Aviemore Building Contractors Ltd is the best extension builder in SE20. No obligation ...
Stuart Bogazzi
Working as a builder for over 20 years now.
Family run business
Can sort any problem out and help build your dreams.
Experienced extension builder ready to quote for your work. Bhagtana & Co Construction is the best extension builder in SE20. No obligation free qu...
Trusted and professional extension builder in SE20. Experienced in all extension buildering work and keeping within budget and on quote. K S BUILDE...
Need to find an Extension Builder near you for all your extension buildering work?
VDL Construction Ltd provides a local, trusted extension...
Experienced extension builder ready to quote for your work. A & P Master Construction is the best extension builder in SE20. No obligation free quo...

Garage conversions in SE20 typically range from £15,568 (Oaksure Construction based in CR0) to £16,344 (Glenn Miller Builders Limited based in BR3), but the only way to get an accurate cost for your specific project is to get quotes.
Post a job with HaMuch and we'll send it to extension builders in SE20 who will be happy to help.
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 - £17,596

Two storey extension - £88,144

Build a timber frame extension - £26,096

Build a swimming pool - £81,096

Single storey extension - £56,920

Side return extension - £42,580

Install an RSJ - £2,296

Outbuilding - £10,096

Build a Mansard loft conversion - £52,096

Loft conversion - £34,650

Build a kitchen extension - £42,096

Hip to gable loft conversion - £42,096

Granny annexe - £87,096

Garden office - £10,096

Convert a Garage - £16,096

Garage - £18,596

Build a flat roof extension - £22,096

Build a dormer loft conversion - £42,096

Concrete foundations - £6,346

Convert a bungalow loft - £29,096

Convert a basement - £38,580