Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.83 (3 reviews)

Find affordable OX1 extension builders

Extension builders rates in OX1 range from £4/hour £2/day (Beaumont Design & Build Ltd) to £45/hour £314/day (Michael E Phillips). To see prices and availability now for your job click green button.

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"Build a two storey extension" - OX3, job posted 01/05/26

"Two storey extension" - OXFORD, job posted 16/09/25

"Single storey extension" - OXFORD, job posted 17/05/25

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 OX1 extension builders rates

Compare OX1 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Oxford	£37	£261
Extension Builders near Abingdon-on-Thames	£35	£258
Extension Builders near Didcot	£36	£266
Extension Builders near Witney	£32	£244
Extension Builders near Cherwell	£35	£249
Extension Builders near South Oxfordshire	£36	£253
Extension Builders near Bicester	£35	£249
Extension Builders near Vale of White Horse	£36	£271
Extension Builders near Aylesbury Vale	£36	£246
Extension Builders near Aylesbury	£42	£270

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 - £26,016

Garden office - £10,016

Granny annexe - £87,016

Build a flat roof extension - £22,016

Convert a Garage - £16,016

Hip to gable loft conversion - £42,016

Convert a bungalow loft - £29,016

Build a dormer loft conversion - £42,016

Build a swimming pool - £81,016

Build a Mansard loft conversion - £52,016

Concrete foundations - £6,266

Underpin a building - £17,516

Two storey extension - £88,024

Convert a basement - £37,680

Side return extension - £41,680

Loft conversion - £33,900

Garage - £18,516

Single storey extension - £55,320

Outbuilding - £10,016

Install an RSJ - £2,216

Build a kitchen extension - £42,016

More extensions & conversions cost guides...

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