From £88,072
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in CR3. No obligation free quotes ...
1 review
From £88,288
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
From £88,036
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
From £88,588
Need an Extension Builder in CR3? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £88,288
Need an Extension Builder in CR3? VA Structures has been helping local clients (10 mile radius) with their extension buildering jobs for many years...
From £88,228
I am a qualified, builder, electrician and plumber. I have been working in the construction industry for over 23 years and have built everything fr...
From £88,456
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
From £89,536
Buci builders ltd is a trusted extension builder serving customers in CR3 and the surrounding area. Contact us to today to get a competitive quote ...
From £88,636
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £88,468
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in CR3. Please contact us for a free, no obligat...

Costs range from £88,036 (SH Enterprise based in EC1V) to £89,536 (Buci builders ltd based in SE27), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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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 - £17,806

Two storey extension - £88,460

Build a timber frame extension - £26,306

Build a swimming pool - £81,306

Single storey extension - £61,128

Side return extension - £44,947

Install an RSJ - £2,506

Outbuilding - £10,306

Build a Mansard loft conversion - £52,306

Loft conversion - £36,623

Build a kitchen extension - £42,306

Hip to gable loft conversion - £42,306

Granny annexe - £87,306

Garden office - £10,306

Convert a Garage - £16,306

Garage - £18,806

Build a flat roof extension - £22,306

Build a dormer loft conversion - £42,306

Concrete foundations - £6,556

Convert a bungalow loft - £29,306

Convert a basement - £40,947