Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.67 (3 reviews)

Find affordable Gorseinon extension builders

Extension builders rates in Gorseinon range from £25/hour £195/day (R M R BUILDING CONTRACTORS) to £50/hour £378/day (KD Construction). To see prices and availability now for your job click Get quotes.

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"Install an RSJ" - SA5, job posted 11/09/26

"New House extension" - SA4, job posted 26/01/25

"Side extension to extend a kitchen 250 cm width 511cm length knocking wall down with tiled roof and velux roof windows. Just looking for quotes for finish to the point where a new kitchen can be added" - SA2, job posted 04/05/24

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 Gorseinon extension builders rates

Compare Gorseinon extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Gorseinon	£29	£228
Extension Builders near Llanelli	£29	£231
Extension Builders near Swansea	£29	£229
Extension Builders near Neath	£30	£225
Extension Builders near Port Talbot	£31	£227
Extension Builders near Neath Port Talbot	£31	£224
Extension Builders near Carmarthen	£26	£205
Extension Builders near Carmarthenshire	£26	£205
Extension Builders near Maesteg	£38	£283
Extension Builders near Pyle	£34	£262

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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