Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.78 (20 reviews)

Find affordable WS5 extension builders

Prices range from cheapest £20/hour and £162/day (Saxonworld Ltd) to £43/hour and £375/day (TG Building Services & Son) - average £30/hr and £237/day

HaMuch is Excellent

Local WS5 extension builders & latest jobs

"Install an RSJ. For bow window replacement" - WS5, job posted 15/09/26

"Single storey extension" - WS4, job posted 30/08/26

"Internal refurbishment works at The Mercian Trust, Great Barr, Walsall. The project includes constructing new partition walls to create a new classroom and office, together with associated plastering, decorating, flooring, ceilings, doors, fixtures, and mechanical and electrical service alterations...." - WS1, job posted 28/07/26

"Small extension and garage roof replacement from flat to pitched" - WS3, job posted 03/07/26

"Loft conversion" - WS10, job posted 08/05/26

"Door into garagefrom kitchen how much" - B74, job posted 20/02/26

"Garage conversion (separate from main house) into a bedroom" - B42, job posted 17/02/26

"Loft conversion with trusses in place, detatched property" - TIPTON, job posted 05/09/25

"New Wetroom for special needs with wheelchair access. Complete build with material,plumbing,wall panels,floor tiles.shower, toilet etc.this will be built joined with a living room. Quotes required.Thanks" - SANDWELL, job posted 26/08/25

"Single storey extension" - WALSALL, job posted 26/08/25

"Loft extension on a semi detached" - DY4, job posted 20/07/25

"Loft extension on a semi detached" - DY4, job posted 19/07/25

"We are looking for a builder to renew support beams in our cellar" - WALSALL, job posted 06/07/25

"Need an extension builder" - SANDWELL, job posted 13/06/25

"Need an extension builder" - WS3, job posted 27/05/25

"Build an outbuilding" - B44, job posted 15/02/25

"WET ROOM WITH WHEELCHAIR ACCESS" - SANDWELL, job posted 05/02/25

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 WS5 extension builders rates

Compare WS5 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Walsall	£29	£226
Extension Builders near Wednesbury	£29	£227
Extension Builders near Sandwell	£29	£229
Extension Builders near Darlaston	£29	£226
Extension Builders near West Bromwich	£29	£227
Extension Builders near Bloxwich	£28	£225
Extension Builders near Willenhall	£29	£225
Extension Builders near Tipton	£29	£227
Extension Builders near Bilston	£29	£226
Extension Builders near Smethwick	£29	£226

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 - £25,896

Garden office - £9,896

Granny annexe - £86,896

Build a flat roof extension - £21,896

Convert a Garage - £15,896

Hip to gable loft conversion - £41,896

Convert a bungalow loft - £28,896

Build a dormer loft conversion - £41,896

Build a swimming pool - £80,896

Build a Mansard loft conversion - £51,896

Concrete foundations - £6,146

Underpin a building - £17,396

Two storey extension - £87,844

Convert a basement - £36,330

Side return extension - £40,330

Loft conversion - £32,775

Garage - £18,396

Single storey extension - £52,920

Outbuilding - £9,896

Install an RSJ - £2,096

Build a kitchen extension - £41,896

More extensions & conversions cost guides...

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