From £17,380
Experienced extension builder ready to quote for your work. CIA Construction Limited is the best extension builder in RM3. No obligation free quote...
From £17,564
Hyde Building Ltd are here to help customers who need an Extension Builder in RM3. We offer a competitive rate to complete all your extension build...
From £17,860
Need an Extension Builder in RM3? 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 £17,508
Over 35 years experience
We are Gas Safe registered
We are Verified
We pride ourselves on great custom...
From £17,892
Need an Extension Builder in RM3? 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 RM3 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 RM3. Please contact us for a free, no obligat...

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 RM3 by posting a job with HaMuch and we will send it to extension builders in RM3.
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 - £17,741

Two storey extension - £88,361

Build a timber frame extension - £26,241

Build a swimming pool - £81,241

Single storey extension - £59,816

Side return extension - £44,209

Install an RSJ - £2,441

Outbuilding - £10,241

Build a Mansard loft conversion - £52,241

Loft conversion - £36,008

Build a kitchen extension - £42,241

Hip to gable loft conversion - £42,241

Granny annexe - £87,241

Garden office - £10,241

Convert a Garage - £16,241

Garage - £18,741

Build a flat roof extension - £22,241

Build a dormer loft conversion - £42,241

Concrete foundations - £6,491

Convert a bungalow loft - £29,241

Convert a basement - £40,209