Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.73 (20 reviews)

Find affordable BD18 extension builders

Extension builders rates in BD18 range from £23/hour £174/day (Westfield Builders) to £35/hour £258/day (RJB Construction and Joinery). To see prices and availability now for your job click Get quotes.

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"Build a dormer loft conversion" - BD9, job posted 13/09/26

"Single storey extension. 3m permitted development at rear of 1970s semi-detached ex Council house. To be two rooms: utility and bathroom accessed from kitchen, and workshop (with sink) with access to living room. We have £25000 total maximum budget. Just need door to extension from kitchen and..." - BD10, job posted 01/07/26

"Kitchen extension" - BRADFORD, job posted 30/04/26

"Loft conversion" - BD6, job posted 05/04/26

"Two storey extension or loft conversion" - BD2, job posted 12/02/26

"Two storey extension" - BD6, job posted 10/02/26

"Velux loft conversion" - BD4, job posted 31/01/26

"Two storey extension rear extension additional bedroom,diner and kitchen" - BD2, job posted 11/01/26

"Two storey extension" - BRADFORD, job posted 11/01/26

"Chimney opening or partial removal" - BD18, job posted 15/10/25

"Loft conversion with or without a dormer" - BD4, job posted 14/10/25

"Single storey extension" - BRADFORD, job posted 02/10/25

"Would like shed base done with flag stone please. 3x3 meters towards end of the garden." - BD2, job posted 17/09/25

"Dormer loft conversion" - BRADFORD, job posted 31/08/25

"Kitchen extension" - BRADFORD, job posted 28/08/25

"Two storey extension" - BRADFORD, job posted 10/07/25

"Kitchen extension and toilet" - BD3, job posted 21/06/25

"RSJ installation" - BRADFORD, job posted 06/06/25

"Two storey extension" - BRADFORD, job posted 05/06/25

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 BD18 extension builders rates

Compare BD18 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Shipley	£29	£226
Extension Builders near Bradford	£29	£224
Extension Builders near Bingley	£30	£228
Extension Builders near Pudsey	£30	£226
Extension Builders near Keighley	£30	£226
Extension Builders near Halifax	£32	£243
Extension Builders near Brighouse	£30	£230
Extension Builders near Morley	£31	£239
Extension Builders near Leeds	£31	£236
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 - £25,816

Garden office - £9,816

Granny annexe - £86,816

Build a flat roof extension - £21,816

Convert a Garage - £15,816

Hip to gable loft conversion - £41,816

Convert a bungalow loft - £28,816

Build a dormer loft conversion - £41,816

Build a swimming pool - £80,816

Build a Mansard loft conversion - £51,816

Concrete foundations - £6,066

Underpin a building - £17,316

Two storey extension - £87,724

Convert a basement - £35,430

Side return extension - £39,430

Loft conversion - £32,025

Garage - £18,316

Single storey extension - £51,320

Outbuilding - £9,816

Install an RSJ - £2,016

Build a kitchen extension - £41,816

More extensions & conversions cost guides...

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