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

Find affordable Rotherham extension builders

Prices range from cheapest £28/hour and £230/day (BUILDWISER) to £53/hour and £424/day (Green Exteriors Ltd) - average £34/hr and £262/day

HaMuch is Excellent

Local Rotherham extension builders, reviews & latest jobs

"Two storey extension" - S63, job posted 25/09/26

"Renovated house full" - S9, job posted 12/09/26

"Construction and repair works including resurfacing driveways, patios, paths and external hardstanding areas, plus associated drainage and groundworks. Construction & Asset" - S9, job posted 26/05/26

"Design, manufacture, deliver and install modular buildings for residential and commercial use across UK public sector projects. New Build" - S9, job posted 26/05/26

"Single story extension" - S60, job posted 24/03/26

"Convert a conservatory to a bedroom with en-suite" - S5, job posted 06/01/26

"Dormer loft conversion" - S65, job posted 04/01/26

"Single storey extension" - S64, job posted 17/11/25

"Building work walls repaired ceilings repaired etc" - S65, job posted 12/10/25

"I would like a loft conversion with a minimum cost such as velux/skylight conversion" - S13, job posted 21/09/25

"Single storey extension" - ROTHERHAM, job posted 13/07/25

"Side return extension" - ROTHERHAM, job posted 30/06/25

"Dormer Loft conversion" - S66, job posted 29/06/25

"3mt sq extension on side of bungalow between 2 walls" - S66, job posted 03/06/25

"Need an extension builder" - S65, job posted 14/05/25

"Attention Construction Businesses The Dynamic Purchasing System (DPS) for Major and Minor Construction Works (2025) is open for eligible suppliers, offering a range of services from plumbing, roofing, to new builds, mainly for social housing and commercial properties. Bid proposals are needed by 21..." - S9, job posted 10/04/25

"Double side and single rear extension on a 60’s semi detached." - S66, job posted 14/03/25

"Chimney stack removal" - S5, job posted 27/12/24

"Conservatory building 14ft by10ft with solid roof and French doors solid wall at 1 side and taking the existing 1 down please quotes please" - S65, job posted 22/10/24

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 Rotherham extension builders rates

Compare Rotherham extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Rotherham	£33	£257
Extension Builders near Wickersley	£33	£257
Extension Builders near Sheffield	£32	£261
Extension Builders near Barnsley	£31	£242
Extension Builders near Dronfield	£33	£262
Extension Builders near Doncaster	£29	£238
Extension Builders near Worksop	£33	£265
Extension Builders near Chesterfield	£33	£257
Extension Builders near Pontefract	£30	£228
Extension Builders near Bassetlaw	£31	£243

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 - £26,112

Garden office - £10,112

Granny annexe - £87,112

Build a flat roof extension - £22,112

Convert a Garage - £16,112

Hip to gable loft conversion - £42,112

Convert a bungalow loft - £29,112

Build a dormer loft conversion - £42,112

Build a swimming pool - £81,112

Build a Mansard loft conversion - £52,112

Concrete foundations - £6,362

Underpin a building - £17,612

Two storey extension - £88,168

Convert a basement - £38,760

Side return extension - £42,760

Loft conversion - £34,800

Garage - £18,612

Single storey extension - £57,240

Outbuilding - £10,112

Install an RSJ - £2,312

Build a kitchen extension - £42,112

More extensions & conversions cost guides...

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