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

Find affordable M18 extension builders

Prices range from cheapest £27/hour and £173/day (MyDestigo) to £35/hour and £260/day (Phoenix builders) - average £31/hr and £223/day

HaMuch is Excellent

Local M18 extension builders & recently posted jobs

"Loft conversion" - OL8, job posted 26/08/26

"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

"Underpinning" - SK16, job posted 29/04/26

"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

"Loft conversion" - OL7, job posted 26/01/26

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

"Two storey extension" - TAMESIDE, job posted 04/01/26

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

"2 story extension building" - OL6, job posted 08/09/25

"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

"Side return extension" - M20, job posted 26/04/25

"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 M18 extension builders rates

Compare M18 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Reddish	£34	£235
Extension Builders near Droylsden	£34	£237
Extension Builders near Denton	£35	£233
Extension Builders near Failsworth	£35	£235
Extension Builders near Manchester	£32	£236
Extension Builders near Dukinfield	£35	£231
Extension Builders near Tameside	£35	£231
Extension Builders near Old Trafford	£32	£236
Extension Builders near Ashton-under-Lyne	£36	£231
Extension Builders near Hyde	£36	£227

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 - £25,824

Garden office - £9,824

Granny annexe - £86,824

Build a flat roof extension - £21,824

Convert a Garage - £15,824

Hip to gable loft conversion - £41,824

Convert a bungalow loft - £28,824

Build a dormer loft conversion - £41,824

Build a swimming pool - £80,824

Build a Mansard loft conversion - £51,824

Concrete foundations - £6,074

Underpin a building - £17,324

Two storey extension - £87,736

Convert a basement - £35,520

Side return extension - £39,520

Loft conversion - £32,100

Garage - £18,324

Single storey extension - £51,480

Outbuilding - £9,824

Install an RSJ - £2,024

Build a kitchen extension - £41,824

More extensions & conversions cost guides...

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