From £17,548
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in IG7. No obligation free quotes ...
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 £17,892
Need an Extension Builder in IG7? 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 £17,804
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
From £18,524
Buci builders ltd is a trusted extension builder serving customers in IG7 and the surrounding area. Contact us to today to get a competitive quote ...
From £17,924
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £17,812
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in IG7. 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...
From £17,932
Krystian Wojasiewicz is a trusted extension builder serving customers in IG7 and the surrounding area. Contact us to today to get a competitive quo...

Underpinning ranges from £17,420 (Nisup Building Services based in HA8) 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 IG7 by posting a job with HaMuch and we will send it to extension builders in IG7.
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 - £17,820

Two storey extension - £88,480

Build a timber frame extension - £26,320

Build a swimming pool - £81,320

Single storey extension - £61,400

Side return extension - £45,100

Install an RSJ - £2,520

Outbuilding - £10,320

Build a Mansard loft conversion - £52,320

Loft conversion - £36,750

Build a kitchen extension - £42,320

Hip to gable loft conversion - £42,320

Granny annexe - £87,320

Garden office - £10,320

Convert a Garage - £16,320

Garage - £18,820

Build a flat roof extension - £22,320

Build a dormer loft conversion - £42,320

Concrete foundations - £6,570

Convert a bungalow loft - £29,320

Convert a basement - £41,100