Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.59 (11 reviews)

Find affordable Antony extension builders

Cheapest £21/hour & £179/day (Donovan Construction ) to £38/hour & £275/day (S&A Developments) - average £32/hr & £236/day

Local Antony extension builders (reviews & jobs) - Sort by rates or availability

"Side return extension" - PLYMOUTH, job posted 22/05/26

"Loft conversion" - PLYMOUTH, job posted 10/01/26

"Loft conversion hi can any one give me some sort of price thanks" - PL3, job posted 04/01/26

"Hip to gable loft conversion" - PL5, job posted 09/12/25

"Underpinning" - PLYMOUTH, job posted 02/12/25

"Single storey extension" - PLYMOUTH, job posted 10/04/25

"Single storey extension" - PLYMOUTH, job posted 01/04/25

"RSJ installation" - PLYMOUTH, job posted 19/03/25

"RSJ installation" - PLYMOUTH, job posted 25/01/25

"Dormer loft conversion" - PLYMOUTH, job posted 11/01/25

"Loft conversion, velux, around 5x5m. Bathtub as well" - PL4, job posted 28/01/24

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 Antony extension builders rates

Compare Antony extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Plymouth	£30	£230
Extension Builders near St Austell	£38	£245
Extension Builders near Newton Abbot	£27	£236
Extension Builders near Paignton	£27	£222
Extension Builders near Teignbridge	£27	£260

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 - £25,888

Garden office - £9,888

Granny annexe - £86,888

Build a flat roof extension - £21,888

Convert a Garage - £15,888

Hip to gable loft conversion - £41,888

Convert a bungalow loft - £28,888

Build a dormer loft conversion - £41,888

Build a swimming pool - £80,888

Build a Mansard loft conversion - £51,888

Concrete foundations - £6,138

Underpin a building - £17,388

Two storey extension - £87,832

Convert a basement - £36,240

Side return extension - £40,240

Loft conversion - £32,700

Garage - £18,388

Single storey extension - £52,760

Outbuilding - £9,888

Install an RSJ - £2,088

Build a kitchen extension - £41,888

More extensions & conversions cost guides...

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