Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.63 (20 reviews)

Find affordable L1 extension builders

Extension builders rates in L1 range from £23/hour £174/day (SJBuild Ltd) to £36/hour £252/day (Danny Anderson Builder). To see prices and availability now for your job click green button.

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

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

"Kitchen extension" - LIVERPOOL, job posted 02/07/26

"RSJ installation" - LIVERPOOL, job posted 21/06/26

"Loft conversion" - CH41, job posted 09/06/26

"Dormer loft conversion" - BEBINGTON, job posted 14/05/26

"Single storey extension" - WIRRAL, job posted 23/04/26

"Loft conversion" - WIRRAL, job posted 22/03/26

"Dormer loft conversion" - L18, job posted 25/02/26

"RSJ installation" - WIRRAL, job posted 01/02/26

"Loft conversion" - LIVERPOOL, job posted 28/01/26

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

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

"Hip to gable loft conversion" - WIRRAL, job posted 21/11/25

"Two storey extension" - LIVERPOOL, job posted 12/10/25

"Loft conversion" - LIVERPOOL, job posted 04/10/25

"Loft conversion" - LIVERPOOL, job posted 24/09/25

"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

"Swimming pool" - LIVERPOOL, job posted 19/07/25

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 L1 extension builders rates

Compare L1 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Liverpool	£31	£222
Extension Builders near Birkenhead	£31	£219
Extension Builders near Wallasey	£32	£224
Extension Builders near Bootle	£32	£224
Extension Builders near Bebington	£31	£222
Extension Builders near Wirral	£31	£219
Extension Builders near Crosby	£33	£223
Extension Builders near Kirkby	£31	£224
Extension Builders near Huyton with Roby	£31	£225
Extension Builders near Knowsley	£31	£222

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 - £25,816

Garden office - £9,816

Granny annexe - £86,816

Build a flat roof extension - £21,816

Convert a Garage - £15,816

Hip to gable loft conversion - £41,816

Convert a bungalow loft - £28,816

Build a dormer loft conversion - £41,816

Build a swimming pool - £80,816

Build a Mansard loft conversion - £51,816

Concrete foundations - £6,066

Underpin a building - £17,316

Two storey extension - £87,724

Convert a basement - £35,430

Side return extension - £39,430

Loft conversion - £32,025

Garage - £18,316

Single storey extension - £51,320

Outbuilding - £9,816

Install an RSJ - £2,016

Build a kitchen extension - £41,816

More extensions & conversions cost guides...

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