Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.75 (20 reviews)

Find local affordable Castlefield extension builders

Cheapest £20/hour & £120/day (Aquatec Builder) to £35/hour & £256/day (Northern Garage Conversion) - average £29/hour & £214/day

Sort by rates or availability

"Install an RSJ" - M27, job posted 02/09/26

"I had a bad job done already from decorated called stephen" - M13, job posted 25/08/26

"Side return extension" - M16, job posted 04/07/26

"Single storey extension" - MANCHESTER, job posted 02/06/26

"Bungalow loft conversion" - PRESTWICH, job posted 26/04/26

"Rear extension, ensuite and living room" - M15, job posted 03/04/26

"HANG 3 NEW DOORS IN NEW FRAMES" - M18, job posted 15/03/26

"Rear extension" - M43, job posted 27/01/26

"Single storey extension" - MANCHESTER, job posted 19/01/26

"Loft conversion raising roof" - M25, job posted 13/01/26

"Loft dorma conversion" - M45, job posted 29/12/25

"Timber frame extension" - M2, job posted 26/12/25

"Side return extension" - M45, job posted 07/09/25

"Loft conversion" - M21, job posted 06/08/25

"Kitchen extension builders needed" - M40, job posted 08/07/25

"Need free survey on extension" - M40, job posted 02/07/25

"Need bedroom 2 knocking into bathroom using some space to create bedroom 2 bigger as it’s small and the bathroom then taking a bit of space from bedroom 3 as it is a lot bigger." - M18, job posted 18/06/25

"Knock kitchen wall down and Install an RSJ" - M33, job posted 09/05/25

"Looking for price for a dormer for 2 bed terraced house" - M19, job posted 08/04/25

"Roof top extension with a bathroom" - M40, job posted 23/03/25

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 Castlefield extension builders rates

Compare Castlefield extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Manchester	£32	£236
Extension Builders near Salford	£32	£237
Extension Builders near Old Trafford	£32	£236
Extension Builders near Prestwich	£31	£233
Extension Builders near Stretford	£32	£235
Extension Builders near Swinton	£32	£234
Extension Builders near Droylsden	£34	£237
Extension Builders near Eccles	£32	£236
Extension Builders near Failsworth	£35	£236
Extension Builders near Whitefield	£31	£229

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 - £25,800

Garden office - £9,800

Granny annexe - £86,800

Build a flat roof extension - £21,800

Convert a Garage - £15,800

Hip to gable loft conversion - £41,800

Convert a bungalow loft - £28,800

Build a dormer loft conversion - £41,800

Build a swimming pool - £80,800

Build a Mansard loft conversion - £51,800

Concrete foundations - £6,050

Underpin a building - £17,300

Two storey extension - £87,700

Convert a basement - £35,250

Side return extension - £39,250

Loft conversion - £31,875

Garage - £18,300

Single storey extension - £51,000

Outbuilding - £9,800

Install an RSJ - £2,000

Build a kitchen extension - £41,800

More extensions & conversions cost guides...

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