Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.69 (13 reviews)

Find affordable Knowsley extension builders

Extension builders rates in Knowsley range from £24/hour £184/day (Mjharrison) to £36/hour £252/day (Dbd). To see prices and availability now for your job click Get quotes.

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"Install an RSJ" - L36, job posted 27/09/26

"Single storey extension" - L4, job posted 14/08/26

"Loft conversion" - L36, job posted 24/04/26

"L shape extention with doom loft" - L4, job posted 27/01/26

"Space for a bedroom" - L36, job posted 11/01/26

"Dormer loft conversion" - ST HELENS, job posted 02/10/25

"Kitchen extension" - L15, job posted 24/08/25

"I would like to do an extension for between 2 to 3 meters" - L11, job posted 04/08/25

"Garage conversion and sitting room wall needed to be taken off please." - L33, job posted 26/07/25

"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..." - WA10, job posted 19/06/25

"Garage conversion" - L18, job posted 21/09/24

"Timber frame extension" - L35, job posted 12/05/24

"Single storey extension, 18m2. Bi-fold doors (approx. 5m across) and 2/3no. velux windows." - ST HELENS, job posted 27/09/23

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 Knowsley extension builders rates

Compare Knowsley extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Knowsley	£31	£222
Extension Builders near Prescot	£31	£223
Extension Builders near Huyton with Roby	£31	£225
Extension Builders near Kirkby	£31	£223
Extension Builders near St Helens	£31	£224
Extension Builders near Widnes	£31	£220
Extension Builders near Halton	£31	£220
Extension Builders near Bootle	£32	£223
Extension Builders near Liverpool	£31	£222
Extension Builders near Maghull	£33	£219

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 - £25,808

Garden office - £9,808

Granny annexe - £86,808

Build a flat roof extension - £21,808

Convert a Garage - £15,808

Hip to gable loft conversion - £41,808

Convert a bungalow loft - £28,808

Build a dormer loft conversion - £41,808

Build a swimming pool - £80,808

Build a Mansard loft conversion - £51,808

Concrete foundations - £6,058

Underpin a building - £17,308

Two storey extension - £87,712

Convert a basement - £35,340

Side return extension - £39,340

Loft conversion - £31,950

Garage - £18,308

Single storey extension - £51,160

Outbuilding - £9,808

Install an RSJ - £2,008

Build a kitchen extension - £41,808

More extensions & conversions cost guides...

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