From £41,370
London, N4
Need an Extension Builder in N4? BM Lofts Limited has been helping local clients (5 mile radius) with their extension buildering jobs for many year...
From £41,280
Mel Massey Studio, based in Finsbury Park, North London, offers interior design, interior styling and project management. With over 10 years of exp...
From £40,380
London, N4
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 £39,030
Our building services company Brothers Group have been helping customers in North, East and West London and the surrounding area by providing profe...
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...
From £40,830
We pride ourselves on our ability to provide unmatched construction, renovation and refurbishment services to homeowners, designers and architects ...
From £42,000
Experienced extension builder ready to quote for your work. Five Star Builder is the best extension builder in N4. No obligation free quotes and ma...
From £40,380
DLER SINGH D S BUILDERS are here to help customers who need an Extension Builder in N4. We offer a competitive rate to complete all your extension ...
From £37,950
Maddison & sons pride ourselves on attention to detail at the highest level.With an extensive background As Mains Contractors in construction fabri...
From £41,010
Need an Extension Builder in N4? F has been helping local clients (5 mile radius) with their extension buildering jobs for many years. Get a quote ...

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 N4 by posting a job with HaMuch and we will send it to extension builders in N4.
"Basement conversion" - N6, job posted 01/01/70
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 - £17,771

Two storey extension - £88,407

Build a timber frame extension - £26,271

Build a swimming pool - £81,271

Single storey extension - £60,424

Side return extension - £44,551

Install an RSJ - £2,471

Outbuilding - £10,271

Build a Mansard loft conversion - £52,271

Loft conversion - £36,293

Build a kitchen extension - £42,271

Hip to gable loft conversion - £42,271

Granny annexe - £87,271

Garden office - £10,271

Convert a Garage - £16,271

Garage - £18,771

Build a flat roof extension - £22,271

Build a dormer loft conversion - £42,271

Concrete foundations - £6,521

Convert a bungalow loft - £29,271

Convert a basement - £40,551