Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.83 (3 reviews)

Find affordable BD21 extension builders

Extension builders rates in BD21 range from £21/hour £158/day (Altar Developments) to £36/hour £263/day (Sagars Home Improvements). To see prices and availability for your job click Get quotes.

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"Side extension kitchen and wetroom. End terrace property" - BD21, job posted 28/05/25

"Build a dormer loft conversion" - BD13, job posted 10/03/25

"Single storey extension" - KEIGHLEY, job posted 09/02/25

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 BD21 extension builders rates

Compare BD21 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Keighley	£30	£226
Extension Builders near Bingley	£30	£228
Extension Builders near Shipley	£29	£226
Extension Builders near Bradford	£29	£224
Extension Builders near Calderdale	£33	£253
Extension Builders near Halifax	£32	£243
Extension Builders near Pudsey	£30	£226
Extension Builders near Brighouse	£30	£230
Extension Builders near Nelson	£27	£214
Extension Builders near Batley	£32	£239

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 - £25,768

Garden office - £9,768

Granny annexe - £86,768

Build a flat roof extension - £21,768

Convert a Garage - £15,768

Hip to gable loft conversion - £41,768

Convert a bungalow loft - £28,768

Build a dormer loft conversion - £41,768

Build a swimming pool - £80,768

Build a Mansard loft conversion - £51,768

Concrete foundations - £6,018

Underpin a building - £17,268

Two storey extension - £87,652

Convert a basement - £34,890

Side return extension - £38,890

Loft conversion - £31,575

Garage - £18,268

Single storey extension - £50,360

Outbuilding - £9,768

Install an RSJ - £1,968

Build a kitchen extension - £41,768

More extensions & conversions cost guides...

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