Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.81 (8 reviews)

Find affordable Keynsham extension builders

Prices range from cheapest £28/hour and £219/day (Concept Solutions Bristol Ltd) to £40/hour and £318/day (GARY G BOND LIMITED) - average £34/hr and £266/day

HaMuch is Excellent

Local Keynsham extension builders & latest jobs

"Single storey extension" - BS4, job posted 17/05/26

"Gallow brackets or rsj beam fitted into a loft to support a chimney breast which is currently supported by timber" - BS15, job posted 25/03/26

"RSJ installation" - BS14, job posted 25/03/26

"Garage conversion" - BA2, job posted 17/09/24

"Hi I was hoping to get a quote for the renovation of an entire house. It’s about 60 years old. I would need: 1. potential plastering of walls, r 2. removal of an existing kitchen & fitting of new 3. Removal of 1 bathroom & fitting of 2 4. garage conversion 5. flooring & carpet, ..." - BS1, job posted 05/09/24

"Hip to gable loft conversion" - BS30, job posted 20/06/24

"RSJ installation Kitchen extension" - BS14, job posted 03/06/24

"Loft conversion for 1930's semi - staircase and loft boarding and eaves, review of roof as it may need repairs. No electrics or plumbing needed." - BS14, job posted 30/07/23

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 Keynsham extension builders rates

Compare Keynsham extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Keynsham	£33	£251
Extension Builders near Kingswood	£34	£257
Extension Builders near Bristol	£33	£255
Extension Builders near Bath	£32	£249
Extension Builders near Clifton	£33	£255
Extension Builders near South Gloucestershire	£34	£260
Extension Builders near Yate	£34	£263
Extension Builders near Bradley Stoke	£34	£259
Extension Builders near Portishead	£33	£247
Extension Builders near North Somerset	£32	£245

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 - £26,072

Garden office - £10,072

Granny annexe - £87,072

Build a flat roof extension - £22,072

Convert a Garage - £16,072

Hip to gable loft conversion - £42,072

Convert a bungalow loft - £29,072

Build a dormer loft conversion - £42,072

Build a swimming pool - £81,072

Build a Mansard loft conversion - £52,072

Concrete foundations - £6,322

Underpin a building - £17,572

Two storey extension - £88,108

Convert a basement - £38,310

Side return extension - £42,310

Loft conversion - £34,425

Garage - £18,572

Single storey extension - £56,440

Outbuilding - £10,072

Install an RSJ - £2,272

Build a kitchen extension - £42,072

More extensions & conversions cost guides...

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