From £6,506
Need an Extension Builder in Seven Sisters? Building Noer General Art Ltd has been helping local clients (5 mile radius) with their extension build...
From £6,642
25 Years after achieving and completing many construction projects in my professional career ( , I decided t...
From £6,562
Need an Extension Builder in Seven Sisters? F has been helping local clients (5 mile radius) with their extension buildering jobs for many years. G...
From £6,410
Build 4 London is an established extension buildering business in Seven Sisters. We come highly recommended and provide competitive quotes for your...
From £6,506
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 £6,378
GG CONSTRUCTION LTD is a trusted extension builder serving customers in Seven Sisters and the surrounding area. Contact us to today to get a compet...
From £6,506
KJV CONSTRUCTION LTD is an established and experienced local extension builder in Seven Sisters. Please contact us for a free, no obligation quote ...
From £6,594
Need an Extension Builder in Seven Sisters? BM Lofts Limited has been helping local clients (5 mile radius) with their extension buildering jobs fo...
From £6,650
Experienced extension builder ready to quote for your work. Five Star Builder is the best extension builder in Seven Sisters. No obligation free qu...

Concrete foundations range from the £5,850 (ADD CONSTRUCTION (LONDON) LTD based in N15) to £6,650 (Five Star Builder based in N16) in Seven Sisters.
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 Seven Sisters 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 - £17,710

Two storey extension - £88,316

Build a timber frame extension - £26,210

Build a swimming pool - £81,210

Single storey extension - £59,208

Side return extension - £43,867

Install an RSJ - £2,410

Outbuilding - £10,210

Build a Mansard loft conversion - £52,210

Loft conversion - £35,723

Build a kitchen extension - £42,210

Hip to gable loft conversion - £42,210

Granny annexe - £87,210

Garden office - £10,210

Convert a Garage - £16,210

Garage - £18,710

Build a flat roof extension - £22,210

Build a dormer loft conversion - £42,210

Concrete foundations - £6,460

Convert a bungalow loft - £29,210

Convert a basement - £39,867