From £38,040
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in E12. No obligation free quotes ...
From £39,570
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in E12. No obligation free quotes and m...
From £41,010
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £43,800
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 £38,580
Experienced extension builder ready to quote for your work. Mr is the best extension builder in E12. No obligation free quotes and many happy custo...
From £37,320
JK Doors is a trusted extension builder serving customers in E12 and the surrounding area. Contact us to today to get a competitive quote for exten...
From £39,660
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £41,910
Need an Extension Builder in E12? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £41,010
skilled worker who specializes in completing a wide range of building and renovation projects
From £44,430
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in E12 and the surrounding area. Contact us to today to get a comp...

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 E12 by posting a job with HaMuch and we will send it to extension builders in E12.
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 - £17,770

Two storey extension - £88,404

Build a timber frame extension - £26,270

Build a swimming pool - £81,270

Single storey extension - £60,392

Side return extension - £44,533

Install an RSJ - £2,470

Outbuilding - £10,270

Build a Mansard loft conversion - £52,270

Loft conversion - £36,278

Build a kitchen extension - £42,270

Hip to gable loft conversion - £42,270

Granny annexe - £87,270

Garden office - £10,270

Convert a Garage - £16,270

Garage - £18,770

Build a flat roof extension - £22,270

Build a dormer loft conversion - £42,270

Concrete foundations - £6,520

Convert a bungalow loft - £29,270

Convert a basement - £40,533