Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.7 (20 reviews)

Find affordable CV3 extension builders

Prices range from cheapest £23/hour and £184/day (Simms Building Services Ltd ) to £32/hour and £249/day (SMM PD) - average £28/hr and £222/day

HaMuch is Excellent

Local CV3 extension builders & latest jobs

"Build a Mansard loft conversion" - CV2, job posted 03/09/26

"Concrete foundations" - CV3, job posted 31/08/26

"Underpinning" - COVENTRY, job posted 05/03/26

"Loft conversion" - COVENTRY, job posted 08/11/25

"Timber frame extension to convert 80sqm bungalow to house" - CV23, job posted 06/10/25

"Timber frame or sips panel extension to convert 80sqm bungalow to house." - CV23, job posted 06/10/25

"Extend house rear single storey" - CV5, job posted 06/09/25

"Basement conversion" - COVENTRY, job posted 30/08/25

"Need an extension builder" - CV4, job posted 14/06/25

"Need an extension builder" - CV4, job posted 08/05/25

"Currently 80sqm bungalow, we want to convert to a house adding 2 nd storey with 3 beds, 3 en-suites. Possibly also adding rear ground floor extension 18sqm." - CV23, job posted 28/04/25

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 CV3 extension builders rates

Compare CV3 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Coventry	£28	£222
Extension Builders near Kenilworth	£29	£224
Extension Builders near Bedworth	£28	£219
Extension Builders near Nuneaton & Bedworth	£28	£219
Extension Builders near Leamington Spa	£27	£212
Extension Builders near Warwick	£28	£213
Extension Builders near Rugby	£31	£224
Extension Builders near Nuneaton	£29	£225
Extension Builders near Knowle	£31	£241
Extension Builders near Hinckley	£29	£224

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 - £25,776

Garden office - £9,776

Granny annexe - £86,776

Build a flat roof extension - £21,776

Convert a Garage - £15,776

Hip to gable loft conversion - £41,776

Convert a bungalow loft - £28,776

Build a dormer loft conversion - £41,776

Build a swimming pool - £80,776

Build a Mansard loft conversion - £51,776

Concrete foundations - £6,026

Underpin a building - £17,276

Two storey extension - £87,664

Convert a basement - £34,980

Side return extension - £38,980

Loft conversion - £31,650

Garage - £18,276

Single storey extension - £50,520

Outbuilding - £9,776

Install an RSJ - £1,976

Build a kitchen extension - £41,776

More extensions & conversions cost guides...

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