From £17,740
TP Building & Development Services Ltd is an established and experienced local extension builder in Blackheath. Please contact us for a free, no ob...
From £17,764
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,380
Need to find an Extension Builder near you for all your extension buildering work?
QUAYSTONE CONSTRUCTION LIMITED provides a local, trusted...
From £17,900
Need an Extension Builder in Blackheath? H2 Construction Ltd has been helping local clients (5 mile radius) with their extension buildering jobs fo...
From £17,436
RLD Contractors Ltd is an established and experienced local extension builder in Blackheath. Please contact us for a free, no obligation quote and ...
From £17,116
Experienced extension builder ready to quote for your work. Jmc buildets is the best extension builder in Blackheath. No obligation free quotes and...
From £17,460
Color Revolution Ltd serving clients in London and surrounding areas providing highest standard renovation services for domestic clients.We are bu...
From £17,740
Denkar Ltd is an established and experienced local extension builder in Blackheath. Please contact us for a free, no obligation quote and competiti...
From £17,540
Dule Vida Property Design Ltd is a trusted extension builder serving customers in Blackheath and the surrounding area. Contact us to today to get a...
From £17,628
Experienced extension builder ready to quote for your work. Storeyboard is the best extension builder in Blackheath. No obligation free quotes and ...

Underpinning ranges from £17,116 (Jmc buildets based in SE9) to £17,900 (H2 Construction Ltd based in SE9), but the final cost will depend on the method of underpinning used, how much of your foundations need underpinning and where you live.
Comparing extension builders estimates for underpinning gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
Get quotes to underpin your home in Blackheath by posting a job with HaMuch and we will send it to extension builders in Blackheath.
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 - £17,570

Two storey extension - £88,106

Build a timber frame extension - £26,070

Build a swimming pool - £81,070

Single storey extension - £56,408

Side return extension - £42,292

Install an RSJ - £2,270

Outbuilding - £10,070

Build a Mansard loft conversion - £52,070

Loft conversion - £34,410

Build a kitchen extension - £42,070

Hip to gable loft conversion - £42,070

Granny annexe - £87,070

Garden office - £10,070

Convert a Garage - £16,070

Garage - £18,570

Build a flat roof extension - £22,070

Build a dormer loft conversion - £42,070

Concrete foundations - £6,320

Convert a bungalow loft - £29,070

Convert a basement - £38,292