From £88,072
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Collier Row. No obligation free...
From £88,840
Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...
From £88,144
Experienced extension builder ready to quote for your work. Mr is the best extension builder in Collier Row. No obligation free quotes and many hap...
From £87,976
JK Doors is a trusted extension builder serving customers in Collier Row and the surrounding area. Contact us to today to get a competitive quote f...
From £88,288
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £88,588
Need an Extension Builder in Collier Row? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for ...
From £88,468
skilled worker who specializes in completing a wide range of building and renovation projects
From £88,924
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in Collier Row and the surrounding area. Contact us to today to ge...
From £87,832
Member since April 2025
Trusted and professional extension builder in Collier Row. Experienced in all extension buildering work and keeping within budget and on quote. GR ...
From £88,300
Relax... you have found a reliable extension builder in Collier Row. Derryard Construction Ltd is a friendly and reliable company based in Collier ...

Costs range from £87,832 (GR MAINTENANCE LTD based in IG11) to £88,924 (HOUSE BUILDING SERVICES LIMITED based in DA16), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
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"Cost regarding: Two storey extension. Currently we have a side garage, we wish to demolish this and build a two story extension. Property is semi detached and post code is RM2 5JX Please note, this property falls in the havering council Conservation area zone. Please if you can assist us..." - RM2, job posted 12/06/24
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 - £17,729

Two storey extension - £88,343

Build a timber frame extension - £26,229

Build a swimming pool - £81,229

Single storey extension - £59,576

Side return extension - £44,074

Install an RSJ - £2,429

Outbuilding - £10,229

Build a Mansard loft conversion - £52,229

Loft conversion - £35,895

Build a kitchen extension - £42,229

Hip to gable loft conversion - £42,229

Granny annexe - £87,229

Garden office - £10,229

Convert a Garage - £16,229

Garage - £18,729

Build a flat roof extension - £22,229

Build a dormer loft conversion - £42,229

Concrete foundations - £6,479

Convert a bungalow loft - £29,229

Convert a basement - £40,074