Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.69 (16 reviews)

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Find affordable GL51 extension builders

Prices range from cheapest £14/hour and £12/day (Premier Building Systems Limited) to £59/hour and £354/day (S Rosato & Sons Ltd) - average £31/hr

HaMuch is Excellent

Local GL51 extension builders

"Bungalow loft conversion" - CHELTENHAM, job posted 09/05/26

"Loft conversion with telebeam, two small pitched roof dormer windows to front and velux to rear. En-suite." - GL52, job posted 14/04/26

"Dormer loft conversion Detached house in GL52 5BW" - CHELTENHAM, job posted 12/10/25

"Removing a chimney breast and installing structural steel" - GL51, job posted 12/09/25

"Kitchen extension" - GL52, job posted 29/06/25

"Need an extension builder" - GL51, job posted 03/06/25

"RSJ installation" - CHELTENHAM, job posted 30/04/25

"Two storey extension" - CHELTENHAM, job posted 26/04/25

"Single story extension 10m x 3m, with lean to style roof and 3/4 roof lights / velux, bifold doors to run 7m across the 10m length. Construction only, internal works such as plumbing, insulating, electrical should not be included." - GL51, job posted 16/04/25

"Single storey extension" - CHELTENHAM, job posted 12/04/25

"Loft conversion with full rear domer, front velux. 1 bed plus ensuite. Potentially 1 fix only" - CHELTENHAM, job posted 30/11/24

"Single storey extension" - CHELTENHAM, job posted 01/07/24

"Loft conversion" - CHELTENHAM, job posted 09/04/24

"Single storey extension" - CHELTENHAM, job posted 05/03/24

"Side return extension" - CHELTENHAM, job posted 07/01/24

"Side return extension" - CHELTENHAM, job posted 25/07/23

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 GL51 extension builders rates

Compare GL51 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Cheltenham	£32	£250
Extension Builders near Gloucester	£30	£235
Extension Builders near Quedgeley	£31	£247
Extension Builders near Stroud	£33	£249
Extension Builders near Evesham	£35	£264
Extension Builders near Great Malvern	£31	£244
Extension Builders near Wychavon	£35	£269
Extension Builders near Worcester	£28	£218
Extension Builders near Thamesdown	£38	£239
Extension Builders near Redditch	£32	£234

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 - £25,912

Garden office - £9,912

Granny annexe - £86,912

Build a flat roof extension - £21,912

Convert a Garage - £15,912

Hip to gable loft conversion - £41,912

Convert a bungalow loft - £28,912

Build a dormer loft conversion - £41,912

Build a swimming pool - £80,912

Build a Mansard loft conversion - £51,912

Concrete foundations - £6,162

Underpin a building - £17,412

Two storey extension - £87,868

Convert a basement - £36,510

Side return extension - £40,510

Loft conversion - £32,925

Garage - £18,412

Single storey extension - £53,240

Outbuilding - £9,912

Install an RSJ - £2,112

Build a kitchen extension - £41,912

More extensions & conversions cost guides...

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