From £37,050
Greater London, N8
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £38,850
We have worked with homeowners all over London and designers to produce work we think you'll love. Our past projects include both new construction ...
From £42,000
Experienced extension builder ready to quote for your work. SSS Brothers Limited is the best extension builder in N8. No obligation free quotes and...
From £41,370
Need an Extension Builder in N8? BM Lofts Limited has been helping local clients (5 mile radius) with their extension buildering jobs for many year...
From £40,380
Michael Collins Builders are experts in domestic conversions and extensions - drawing on over 25 years experience in the trade. We have built up a ...
From £36,600
Need to find an Extension Builder near you for all your extension buildering work?
OAKWOOD CONSTRUCTION UK LTD provides a local, trusted ex...
From £37,950
London Metropolitan Construction Ltd is and property refurbishment and renovation company based and operating throughout London undertaking new bui...
From £37,770
Whether it's garden design, a garden studio or home renovations - we can do it. What you show me, what you imagine, we can build. Contact us now fo...
From £41,640
Relax... you have found a reliable extension builder in N8. CM Build is a friendly and reliable company based in N8 who consider no job as too big ...
From £41,280
We make the adage ‘House is where the heart is’, a reality for the house-owners.We are an empathetic housebuilder that delivers elegance and du...

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 N8 by posting a job with HaMuch and we will send it to extension builders in N8.
"Basement conversion" - N6
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 - £17,677

Two storey extension - £88,265

Build a timber frame extension - £26,177

Build a swimming pool - £81,177

Single storey extension - £58,536

Side return extension - £43,489

Install an RSJ - £2,377

Outbuilding - £10,177

Build a Mansard loft conversion - £52,177

Loft conversion - £35,408

Build a kitchen extension - £42,177

Hip to gable loft conversion - £42,177

Granny annexe - £87,177

Garden office - £10,177

Convert a Garage - £16,177

Garage - £18,677

Build a flat roof extension - £22,177

Build a dormer loft conversion - £42,177

Concrete foundations - £6,427

Convert a bungalow loft - £29,177

Convert a basement - £39,489