Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.5 (3 reviews)

Find affordable Ossett extension builders

Prices range from cheapest £22/hour and £149/day (GPK) to £36/hour and £289/day (Jones Masonry Ltd) - average £30/hr and £236/day

HaMuch is Excellent

Local Ossett extension builders & latest jobs

"Loft conversion" - WF2, job posted 16/09/26

"Two storey extension" - WF17, job posted 12/06/26

"YPO Alternative Fuelled Vehicles DPS – £1B Opportunity We invite suppliers to join our Dynamic Purchasing System (DPS) for Alternative Fuelled Vehicles, supporting sustainable transport solutions across the UK. With potential extensions, this contract offers long-term, high-value opportunities. ..." - WF2, job posted 03/04/25

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 Ossett extension builders rates

Compare Ossett extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Ossett	£33	£245
Extension Builders near Dewsbury	£33	£245
Extension Builders near Wakefield	£31	£240
Extension Builders near Batley	£32	£239
Extension Builders near Morley	£31	£239
Extension Builders near Mirfield	£31	£236
Extension Builders near Beeston	£31	£236
Extension Builders near Normanton	£30	£233
Extension Builders near Rothwell	£30	£230
Extension Builders near Leeds	£31	£236

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 - £25,872

Garden office - £9,872

Granny annexe - £86,872

Build a flat roof extension - £21,872

Convert a Garage - £15,872

Hip to gable loft conversion - £41,872

Convert a bungalow loft - £28,872

Build a dormer loft conversion - £41,872

Build a swimming pool - £80,872

Build a Mansard loft conversion - £51,872

Concrete foundations - £6,122

Underpin a building - £17,372

Two storey extension - £87,808

Convert a basement - £36,060

Side return extension - £40,060

Loft conversion - £32,550

Garage - £18,372

Single storey extension - £52,440

Outbuilding - £9,872

Install an RSJ - £2,072

Build a kitchen extension - £41,872

More extensions & conversions cost guides...

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