Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.68 (20 reviews)

Find affordable Ainsworth extension builders

Prices range from cheapest £20/hour and £120/day (Aquatec Builder) to £35/hour and £255/day (PETER BALDWIN BUILDERS) - average £29/hr and £213/day

HaMuch is Excellent

Local Ainsworth extension builders, reviews & latest jobs

"Loft conversion or dormer" - BL3, job posted 28/07/26

"Dormer loft conversion" - BL3, job posted 05/07/26

"Suppliers are invited to express interest in a tender opportunity for the supply of building construction materials to support public sector projects within the Bury area. Requirements may include construction products, aggregates, timber, concrete, building supplies, and related materials...." - BL9, job posted 09/06/26

"Dormer loft conversion" - BOLTON, job posted 27/04/26

"Loft conversion" - BL3, job posted 27/04/26

"Loft conversion" - BOLTON, job posted 16/04/26

"Kitchen extension" - BL9, job posted 03/03/26

"Loft conversion" - BL4, job posted 16/02/26

"RSJ installation" - BOLTON, job posted 23/11/25

"Loft conversion" - BOLTON, job posted 27/10/25

"Loft extension with dormer" - BL1, job posted 17/09/25

"RSJ installation" - BOLTON, job posted 17/09/25

"Convert garages to 3 or 2 bedroom ensuite semi detached house" - BL4, job posted 13/07/25

"Two storey extension" - BOLTON, job posted 24/04/25

"Two storey extension" - BOLTON, job posted 06/02/25

"Loft conversion" - BOLTON, job posted 16/12/24

"Loft dormer conversion" - BOLTON, job posted 30/11/24

"Loft conversion" - BOLTON, job posted 22/07/24

"Dorma loft conversion on a 2 bed 68.6m2 ( 739sqft) semi detached bungalow would ideally like two bedrooms and a bathroom In the conversion" - BL7, job posted 22/05/24

"Basement conversion" - BOLTON, job posted 26/03/24

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 Ainsworth extension builders rates

Compare Ainsworth extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Bolton	£31	£219
Extension Builders near Farnworth	£30	£219
Extension Builders near Radcliffe	£30	£220
Extension Builders near Little Hulton	£30	£220
Extension Builders near Bury	£30	£220
Extension Builders near Whitefield	£31	£229
Extension Builders near Westhoughton	£31	£222
Extension Builders near Swinton	£32	£235
Extension Builders near Atherton	£31	£223
Extension Builders near Horwich	£30	£219

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 - £25,744

Garden office - £9,744

Granny annexe - £86,744

Build a flat roof extension - £21,744

Convert a Garage - £15,744

Hip to gable loft conversion - £41,744

Convert a bungalow loft - £28,744

Build a dormer loft conversion - £41,744

Build a swimming pool - £80,744

Build a Mansard loft conversion - £51,744

Concrete foundations - £5,994

Underpin a building - £17,244

Two storey extension - £87,616

Convert a basement - £34,620

Side return extension - £38,620

Loft conversion - £31,350

Garage - £18,244

Single storey extension - £49,880

Outbuilding - £9,744

Install an RSJ - £1,944

Build a kitchen extension - £41,744

More extensions & conversions cost guides...

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