Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.8 (5 reviews)

Find affordable Warwick extension builders

Prices range from cheapest £25/hour and £198/day (NEXUS BUILDING SOLUTIONS LTD) to £30/hour and £237/day (Templederry Properties) - average £27/hr and £215/day

HaMuch is Excellent

Local Warwick extension builders & latest jobs

"Dormer loft conversion. Please email or text in first instance, thanks!" - CV31, job posted 02/07/26

"Job Title: House Extension & Internal Renovation – Warwick (CV34) Description: We are looking for an experienced and reliable builder or construction team for renovation and extension work on a semi-detached house in Warwick (CV34). The property has a completed ground floor extension, and we..." - CV34, job posted 07/07/25

"Basement conversion" - CV8, job posted 10/03/25

"Loft conversion (medium to large size) for a four bedroom detached house. Ideally 1/2 rooms and 1 toilet. Start in 3 months. We also wanted to get a quote for rear extension for exploration." - WARWICK, job posted 08/12/24

"Hip to gable loft conversion" - WARWICK, job posted 29/07/24

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 Warwick extension builders rates

Compare Warwick extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Warwick	£28	£213
Extension Builders near Leamington Spa	£27	£212
Extension Builders near Kenilworth	£29	£224
Extension Builders near Stratford-on-Avon	£27	£215
Extension Builders near Stratford-upon-Avon	£27	£215
Extension Builders near Coventry	£28	£222
Extension Builders near Knowle	£31	£241
Extension Builders near Solihull	£29	£231
Extension Builders near Bedworth	£28	£219
Extension Builders near Rugby	£31	£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 - £25,720

Garden office - £9,720

Granny annexe - £86,720

Build a flat roof extension - £21,720

Convert a Garage - £15,720

Hip to gable loft conversion - £41,720

Convert a bungalow loft - £28,720

Build a dormer loft conversion - £41,720

Build a swimming pool - £80,720

Build a Mansard loft conversion - £51,720

Concrete foundations - £5,970

Underpin a building - £17,220

Two storey extension - £87,580

Convert a basement - £34,350

Side return extension - £38,350

Loft conversion - £31,125

Garage - £18,220

Single storey extension - £49,400

Outbuilding - £9,720

Install an RSJ - £1,920

Build a kitchen extension - £41,720

More extensions & conversions cost guides...

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