Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.5 (3 reviews)

Find affordable BN20 extension builders

Extension builders rates in BN20 range from £23/hour £185/day (Homecare Building Maintenance) to £45/hour £348/day (Insite Sepecialists). To see prices and availability now for your job click Get quotes.

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"Garage" - BN23, job posted 03/09/26

"Loft conversion" - EASTBOURNE, job posted 26/02/26

"Loft conversion" - BN23, job posted 30/06/24

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 BN20 extension builders rates

Compare BN20 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Eastbourne	£32	£245
Extension Builders near Seaford	£34	£243
Extension Builders near Hailsham	£31	£243
Extension Builders near Bexhill-on-Sea	£31	£243
Extension Builders near Wealden	£35	£256
Extension Builders near Hastings	£31	£246
Extension Builders near Brighton and Hove	£35	£251
Extension Builders near Brighton	£35	£251
Extension Builders near Crowborough	£36	£258
Extension Builders near Burgess Hill	£36	£240

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 - £25,960

Garden office - £9,960

Granny annexe - £86,960

Build a flat roof extension - £21,960

Convert a Garage - £15,960

Hip to gable loft conversion - £41,960

Convert a bungalow loft - £28,960

Build a dormer loft conversion - £41,960

Build a swimming pool - £80,960

Build a Mansard loft conversion - £51,960

Concrete foundations - £6,210

Underpin a building - £17,460

Two storey extension - £87,940

Convert a basement - £37,050

Side return extension - £41,050

Loft conversion - £33,375

Garage - £18,460

Single storey extension - £54,200

Outbuilding - £9,960

Install an RSJ - £2,160

Build a kitchen extension - £41,960

More extensions & conversions cost guides...

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