Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.63 (20 reviews)

Find affordable Kent extension builders now

Extension builders rates in Kent range from £31/hour £202/day (Hyde Building Ltd) to £55/hour £327/day (HOUSE BUILDING SERVICES LIMITED). To see prices and availability now for your job click green button.

HaMuch is Excellent

How HaMuch saves you money

Post your job for free

We send your job to ALL Kent extension builders

Compare quotes

Available extension builders in Kent reply

Save Money

Select an affordable extension builder

Post your job

Sort by

"Concrete foundation" - DARTFORD, job posted 04/03/26

"Dormer loft conversion" - ORPINGTON, job posted 13/02/26

"Loft conversion" - DARTFORD, job posted 03/02/26

"Two storey extension" - DARTFORD, job posted 18/12/25

"Outbuilding" - SIDCUP, job posted 12/11/25

"House clearing - same property you have serviced before" - DA5, job posted 11/10/25

"Granny annexe" - BEXLEYHEATH, job posted 07/10/25

"Single storey extension" - DA15, job posted 20/05/25

"Underpinning" - BEXLEY, job posted 10/03/25

"Loft conversion" - DARTFORD, job posted 04/03/25

"Looking to convert our loft into a room, end of terraced house." - DA2, job posted 04/03/25

"Bungalow loft conversion" - PETTS WOOD, job posted 28/02/25

"Bungalow loft conversion" - PETTS WOOD, job posted 16/01/25

"Two storey rear extension" - DARTFORD, job posted 02/01/25

"Single storey Kitchen extension 4-6m" - DA1, job posted 24/08/24

"Loft conversion" - DARTFORD, job posted 17/08/24

"Loft conversion" - DARTFORD, job posted 10/07/24

"Bungalow Kitchen extension Size - 5m x 3m Bricks - to match existing Skylight" - ORPINGTON, job posted 16/03/24

"Loft conversion" - DARTFORD, job posted 11/09/23

"Loft conversion" - DARTFORD, job posted 11/08/23

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 Kent extension builders rates

Compare Kent extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Bexley	£42	£265
Extension Builders near Dartford	£41	£265
Extension Builders near Bromley	£43	£268
Extension Builders near Northfleet	£41	£261
Extension Builders near Sevenoaks	£38	£234
Extension Builders near Grays	£41	£261
Extension Builders near South Ockendon	£42	£264
Extension Builders near Lewisham	£43	£268
Extension Builders near Gravesend	£40	£260
Extension Builders near Greenwich	£44	£268

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 - £26,112

Garden office - £10,112

Granny annexe - £87,112

Build a flat roof extension - £22,112

Convert a Garage - £16,112

Hip to gable loft conversion - £42,112

Convert a bungalow loft - £29,112

Build a dormer loft conversion - £42,112

Build a swimming pool - £81,112

Build a Mansard loft conversion - £52,112

Concrete foundations - £6,362

Underpin a building - £17,612

Two storey extension - £88,168

Convert a basement - £38,760

Side return extension - £42,760

Loft conversion - £34,800

Garage - £18,612

Single storey extension - £57,240

Outbuilding - £10,112

Install an RSJ - £2,312

Build a kitchen extension - £42,112

More extensions & conversions cost guides...

People in Kent searching for a Extension Builder also viewed...

Painter and Decorator

The Largest Database of UK Trade Rates

At HaMuch we know what tradespeople charge because we have the largest database of rates anywhere in the UK. If you want quotes for jobs at the right price for you, post your jobs with HaMuch and get your home improvements kickstarted straight away!

Appliance Repair Specialist

Conservatory Specialist