Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.75 (4 reviews)

Find affordable WA9 extension builders - average £27/hr

Prices range from cheapest £15/hour and £150/day (MJ Barker & Son) to £40/hour and £260/day (GUD Builders)

Local WA9 extension builders

"Dormer loft conversion" - ST HELENS

"St Helens Council has released a tender for the internal refurbishment of Thatto Heath Primary School, aimed at enhancing SEND provision. The project is scheduled to run from 21 July to 29 August 2025, with an estimated contract value of £228,000 including VAT. The opportunity is reserved..." - JESSICA, WA10

"Timber frame extension" - L35

"Single storey extension, 18m2. Bi-fold doors (approx. 5m across) and 2/3no. velux windows." - MICHAEL, ST HELENS

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 WA9 extension builders rates

Compare WA9 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near St Helens	£27	£195
Extension Builders near Newton-le-Willows	£27	£196
Extension Builders near Prescot	£29	£211
Extension Builders near Knowsley	£29	£208
Extension Builders near Widnes	£27	£193
Extension Builders near Huyton with Roby	£29	£210
Extension Builders near Ashton-in-Makerfield	£26	£191
Extension Builders near Halton	£27	£193
Extension Builders near Golborne	£26	£193
Extension Builders near Warrington	£27	£196

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 - £25,560

Garden office - £9,560

Granny annexe - £86,560

Build a flat roof extension - £21,560

Convert a Garage - £15,560

Hip to gable loft conversion - £41,560

Convert a bungalow loft - £28,560

Build a dormer loft conversion - £41,560

Build a swimming pool - £80,560

Build a Mansard loft conversion - £51,560

Concrete foundations - £5,810

Underpin a building - £17,060

Two storey extension - £87,340

Convert a basement - £32,550

Side return extension - £36,550

Loft conversion - £29,625

Garage - £18,060

Single storey extension - £46,200

Outbuilding - £9,560

Install an RSJ - £1,760

Build a kitchen extension - £41,560

More extensions & conversions cost guides...

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