From £6,506
L&V BUILDING CONSTRUCTION LTD are here to help customers who need an Extension Builder in Finchley. We offer a competitive rate to complete all you...
From £6,450
Finchley Greater London, N3
Ninos Carpentry LtdComplete Refurbishment Front, Side and Rear Extensions. Loft Conversions Garage Conversion All types of Roofs. Front Drive and D...
From £6,410
Lacon Design & Build are here to help customers who need an Extension Builder in Finchley. We offer a competitive rate to complete all your extensi...
From £6,234
Finchley, N3
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,626
Trusted and professional extension builder in Finchley. Experienced in all extension buildering work and keeping within budget and on quote. DS Con...
From £6,114
Londonderry, N3
Experienced extension builder ready to quote for your work. Buildwiseonecompanyfoursolutions Ltd. is the best extension builder in Finchley. No obl...
From £6,346
Relax... you have found a reliable extension builder in Finchley. Taylor Construction Services Ltd is a friendly and reliable company based in Finc...
From £6,426
Finchley Greater London, N3
BestDecorLondonLtd is an established and experienced local extension builder in Finchley. Please contact us for a free, no obligation quote and com...
From £6,602
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £6,330
We are a London-based residential design and build company with over 30 years of combined experience in our management team. We specialize in high-...

Concrete foundations range from the £6,114 (Buildwiseonecompanyfoursolutions Ltd. based in N3) to £6,626 (DS Construction based in N3) in Finchley.
Comparing extension builders estimates for laying concrete foundations gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Find out the exact cost of laying concrete foundations in Finchley by posting a job with HaMuch. We will send it to extension builders who can give you a detailed quote.
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 - £17,654

Two storey extension - £88,232

Build a timber frame extension - £26,154

Build a swimming pool - £81,154

Single storey extension - £58,088

Side return extension - £43,237

Install an RSJ - £2,354

Outbuilding - £10,154

Build a Mansard loft conversion - £52,154

Loft conversion - £35,198

Build a kitchen extension - £42,154

Hip to gable loft conversion - £42,154

Granny annexe - £87,154

Garden office - £10,154

Convert a Garage - £16,154

Garage - £18,654

Build a flat roof extension - £22,154

Build a dormer loft conversion - £42,154

Concrete foundations - £6,404

Convert a bungalow loft - £29,154

Convert a basement - £39,237