Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 4.68 (20 reviews)

Find affordable Killingworth extension builders

Prices range from cheapest £16/hour and £130/day (OCC Construction) to £48/hour and £360/day (Premier Preservations Ltd) - average £34/hr and £247/day

HaMuch is Excellent

Local Killingworth extension builders, reviews & latest jobs

"Job Title: Internal Wall Removal & Structural Steel Installation (Calcs Ready) Job Description: Hi, I am looking for a reliable, experienced general builder for a structural project at my home in Newcastle.The project involves removing two internal walls:A load-bearing living room wall. I already..." - NE7, job posted 21/06/26

"Dormer loft conversion" - NE6, job posted 16/05/26

"Side return extension" - NORTH SHIELDS, job posted 17/04/26

"Dormer loft conversion" - NE29, job posted 19/03/26

"Dormer loft conversion hip to gable" - NE7, job posted 20/02/26

"Install 2 RSJs." - NE3, job posted 05/11/25

"Hi we’re looking for a quote into getting a small extension built We have bathroom and kitchen on back of house and wanting to open kitchen up We have a wall in between the kitchen and bathroom which needs knocking down for the extension to work otherwise it won’t be needed looking to find out..." - NE3, job posted 15/10/25

"2 story extension back of house extended kitchen extra 2 bedrooms" - NORTH TYNESIDE, job posted 13/10/25

"2 story extension back of house" - NORTH TYNESIDE, job posted 13/10/25

"Add an extension on the gable end and open up the kitchen into the existing extension. Add skylights in the kitchen. Existing extension may be enlarged also." - NE29, job posted 05/10/25

"Add extenion on the gable end and also open out kitchen in to extension we have. Add skylights for the kitchen also." - NE29, job posted 05/10/25

"Extension to front of house, approx 2m x 4m" - NE30, job posted 04/09/25

"Loft conversion" - JESMOND, job posted 17/07/25

"Loft conversion" - NORTH TYNESIDE, job posted 20/06/25

"Dormer loft conversion" - NEWCASTLE UPON TYNE, job posted 01/04/25

"Hip to gable loft conversion" - NEW, job posted 04/02/25

"Dormer loft conversion" - NEWCASTLE UPON TYNE, job posted 15/01/25

"Loft conversion" - NORTH TYNESIDE, job posted 28/09/24

"Loft conversion" - NORTH TYNESIDE, job posted 09/09/24

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 Killingworth extension builders rates

Compare Killingworth extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Longbenton	£34	£234
Extension Builders near Wallsend	£34	£245
Extension Builders near North Tyneside	£35	£253
Extension Builders near Whitley Bay	£38	£268
Extension Builders near Newcastle Upon Tyne	£33	£236
Extension Builders near Cramlington	£36	£256
Extension Builders near Hebburn	£34	£246
Extension Builders near Tynemouth	£36	£257
Extension Builders near Gateshead	£33	£236
Extension Builders near Jarrow	£34	£262

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 - £26,008

Garden office - £10,008

Granny annexe - £87,008

Build a flat roof extension - £22,008

Convert a Garage - £16,008

Hip to gable loft conversion - £42,008

Convert a bungalow loft - £29,008

Build a dormer loft conversion - £42,008

Build a swimming pool - £81,008

Build a Mansard loft conversion - £52,008

Concrete foundations - £6,258

Underpin a building - £17,508

Two storey extension - £88,012

Convert a basement - £37,590

Side return extension - £41,590

Loft conversion - £33,825

Garage - £18,508

Single storey extension - £55,160

Outbuilding - £10,008

Install an RSJ - £2,208

Build a kitchen extension - £42,008

More extensions & conversions cost guides...

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