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Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need to find an Extension Builder near you for all your extension buildering work?
MAX CONSTRUCTION LTD provides a local, trusted extension...
Relax... you have found a reliable extension builder in Hillingdon. C T Edwards is a friendly and reliable company based in Hillingdon who consider...
ALG Renovations is a well established, trustworthy, reliable and professional operation with over 17 years experience myself in the trade, base...
Bill Matharu
Matharu Buildings is an established extension buildering business in Hillingdon. We come highly recommended and provide competitive quotes for your...
Need an Extension Builder in Hillingdon? Ava Constructions & Decors Ltd has been helping local clients (10 mile radius) with their extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
GMB BUILDING SERVICES is an established and experienced local extension builder in Hillingdon. Please contact us for a free, no obligation quote an...
Sheppard Construction Ltd is a trusted extension builder serving customers in Hillingdon and the surrounding area. Contact us to today to get a com...
Ideal Construction is an established extension buildering business in Hillingdon. We come highly recommended and provide competitive quotes for you...

Underpinning ranges from £17,380 (MAX CONSTRUCTION LTD based in HA4) to £17,932 (GMB BUILDING SERVICES based in UB8), 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 Hillingdon by posting a job with HaMuch and we will send it to extension builders in Hillingdon.
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 - £17,664

Two storey extension - £88,246

Build a timber frame extension - £26,164

Build a swimming pool - £81,164

Single storey extension - £58,280

Side return extension - £43,345

Install an RSJ - £2,364

Outbuilding - £10,164

Build a Mansard loft conversion - £52,164

Loft conversion - £35,288

Build a kitchen extension - £42,164

Hip to gable loft conversion - £42,164

Granny annexe - £87,164

Garden office - £10,164

Convert a Garage - £16,164

Garage - £18,664

Build a flat roof extension - £22,164

Build a dormer loft conversion - £42,164

Concrete foundations - £6,414

Convert a bungalow loft - £29,164

Convert a basement - £39,345