Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.56 (17 reviews)

Find affordable Banstead extension builders

Extension builders rates in Banstead range from £30/hour £242/day (Masters Property Services) to £112/hour £400/day (Imq). To see prices and availability now for your job click Get quotes.

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"Single storey extension" - COULSDON, job posted 17/07/26

"For garden extention" - SM5, job posted 23/06/26

"RSJ installation also I will need help with the cost of theses below IRS extension either the following measurements. L-3m w-3.5m H-Item Site Preparation Groundworks & Foundations Floor Construction Superstructure Roof Construction Windows and External Doors Internal Works Electrical ..." - CR3, job posted 08/11/25

"Thank you so much single story extension" - NORTH CHEAM, job posted 27/10/25

"Side return extension" - COULSDON, job posted 04/10/25

"Build a hip to gable loft conversion" - KT4, job posted 22/09/25

"Loft conversion" - CR2, job posted 30/06/25

"Side return extension" - COULSDON, job posted 17/05/25

"Two storey extension on the side and rear, new kitchen, new bathrooms" - WORCESTER, job posted 15/05/25

"Side return extension" - COULSDON, job posted 19/04/25

"Single storey extension" - WORCESTER, job posted 18/02/25

"Single storey extension" - WORCESTER, job posted 31/01/25

"Loft conversion" - STONELEIGH, job posted 18/12/24

"Loft conversion" - WORCESTER PARK, job posted 31/08/24

"Side return extension and loft extension" - KT18, job posted 19/08/24

"Loft conversion or ground floor extension" - CR2, job posted 21/03/24

"Just a general enquiry" - KT4, job posted 02/10/23

What are the best ways to avoid problems when paying the Extension Builder?

The most important thing is do avoid handing over cash or paying large sums in advance. Be wary of paying cash for a cheaper job, i.e. to avoid VAT, you may be going down a slippery slope of not doing things properly which may eventually mean your job is also not done properly.

Agree when you intend to pay, ideally after you are satisfied with the completed job. If it is a big job agree a schedule of staged payments which is fair to both parties.

To avoid bad tradespeople and to ensure you can find them should they not answer a mobile;

Get proper contact details and check them yourself
Check if the company is verified on the Companies House website
Get phone details, ideally a land line or 0800 number and check it
Get a physical office address

Before the job starts should I agree standards of quality and behaviour?

Get quotes in writing by email or in person if possible. Getting quotes online or by text is ok (make sure you accept the offer by replying). For large projects make a written agreement, schedule of works and snagging plans as part of a working document. Also;

Agree expected quality of workmanship and materials in advance
When will work start and when will project be finished, what happens if project over runs ?
How long is the guarantee on work and materials eg 12 months
Discuss onsite behaviour in advance (no smoking, swearing or using mobile phones for non-work purposes)
Agree that your Extension Builder will remove all debris and rubbish and what level of tidying up you want after job

Compare Banstead extension builders rates

Compare Banstead extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Epsom	£43	£274
Extension Builders near Reigate & Banstead	£41	£271
Extension Builders near Tadworth	£41	£271
Extension Builders near Ewell	£43	£274
Extension Builders near Sutton	£43	£273
Extension Builders near Merton	£43	£272
Extension Builders near Caterham	£43	£271
Extension Builders near Reigate	£40	£270
Extension Builders near Redhill	£41	£269
Extension Builders near Croydon	£42	£267

Job estimates from extension builders near you

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.

Build a timber frame extension - £26,168

Garden office - £10,168

Granny annexe - £87,168

Build a flat roof extension - £22,168

Convert a Garage - £16,168

Hip to gable loft conversion - £42,168

Convert a bungalow loft - £29,168

Build a dormer loft conversion - £42,168

Build a swimming pool - £81,168

Build a Mansard loft conversion - £52,168

Concrete foundations - £6,418

Underpin a building - £17,668

Two storey extension - £88,252

Convert a basement - £39,390

Side return extension - £43,390

Loft conversion - £35,325

Garage - £18,668

Single storey extension - £58,360

Outbuilding - £10,168

Install an RSJ - £2,368

Build a kitchen extension - £42,168

More extensions & conversions cost guides...

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