From £17,380
Experienced extension builder ready to quote for your work. CIA Construction Limited is the best extension builder in RM4. No obligation free quote...
From £17,564
Hyde Building Ltd are here to help customers who need an Extension Builder in RM4. We offer a competitive rate to complete all your extension build...
From £17,860
Need an Extension Builder in RM4? Ellis & James Builders Limited has been helping local clients (20 mile radius) with their extension buildering jo...
1 review
From £17,692
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
From £17,524
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
From £17,892
Need an Extension Builder in RM4? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £17,652
I am a qualified, builder, electrician and plumber. I have been working in the construction industry for over 23 years and have built everything fr...
From £18,524
Buci builders ltd is a trusted extension builder serving customers in RM4 and the surrounding area. Contact us to today to get a competitive quote ...
From £17,812
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in RM4. Please contact us for a free, no obligat...
From £17,420
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...

Underpinning ranges from £17,380 (CIA Construction Limited based in RM18) to £18,524 (Buci builders ltd based in SE27), 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 RM4 by posting a job with HaMuch and we will send it to extension builders in RM4.
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 - £17,732

Two storey extension - £88,348

Build a timber frame extension - £26,232

Build a swimming pool - £81,232

Single storey extension - £59,640

Side return extension - £44,110

Install an RSJ - £2,432

Outbuilding - £10,232

Build a Mansard loft conversion - £52,232

Loft conversion - £35,925

Build a kitchen extension - £42,232

Hip to gable loft conversion - £42,232

Granny annexe - £87,232

Garden office - £10,232

Convert a Garage - £16,232

Garage - £18,732

Build a flat roof extension - £22,232

Build a dormer loft conversion - £42,232

Concrete foundations - £6,482

Convert a bungalow loft - £29,232

Convert a basement - £40,110