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

Find affordable Northfield extension builders

Prices range from cheapest £24/hour and £196/day (ARGENT BUILDERS LTD) to £58/hour and £350/day (Inside & Out Property Refurbishments) - average £32/hr and £239/day

HaMuch is Excellent

Local Northfield extension builders, reviews & latest jobs

"Build a kitchen extension" - B13, job posted 28/08/26

"Loft conversion" - B47, job posted 19/08/26

"Build an economic shed Slabbed area = 1.8*3.6m. Please quote me materials +labour. Wants a wooden structure" - B45, job posted 10/07/26

"Loft conversion" - B30, job posted 26/05/26

"Loft conversion" - B68, job posted 06/05/26

"Dormer loft conversion" - B62, job posted 17/03/26

"Small downstairs extension to front property, to install a toilet and associated plumbing, remove small brick wall on drive" - B32, job posted 18/10/25

"Concrete foundation" - B29, job posted 03/09/25

"We would like a builder for a 3m extension to the back of our house (similar to a conservatory)." - B30, job posted 15/03/25

"Build an outbuilding" - B14, job posted 05/02/25

"Do you do small job, patio wall and steps at my son's house need repairs. Would you be interested." - ALVECHURCH, job posted 18/06/24

"Loft conversion" - B45, job posted 21/02/24

"Dear Sir / Madam We're in the process of buying the home below and would like to get a very rough ballpark figure for a loft conversion, including ensuite bathroom and staircase: I've attached an image of the roof from Google Satellite View, from the rear aspect of the home, where I believe a..." - B32, job posted 24/08/23

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 Northfield extension builders rates

Compare Northfield extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Halesowen	£29	£227
Extension Builders near Oldbury	£29	£227
Extension Builders near Smethwick	£29	£226
Extension Builders near Rowley Regis	£29	£226
Extension Builders near Birmingham	£29	£227
Extension Builders near Bromsgrove	£31	£237
Extension Builders near West Bromwich	£29	£227
Extension Builders near Brierley Hill	£28	£222
Extension Builders near Stourbridge	£28	£223
Extension Builders near Solihull	£29	£231

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 - £25,856

Garden office - £9,856

Granny annexe - £86,856

Build a flat roof extension - £21,856

Convert a Garage - £15,856

Hip to gable loft conversion - £41,856

Convert a bungalow loft - £28,856

Build a dormer loft conversion - £41,856

Build a swimming pool - £80,856

Build a Mansard loft conversion - £51,856

Concrete foundations - £6,106

Underpin a building - £17,356

Two storey extension - £87,784

Convert a basement - £35,880

Side return extension - £39,880

Loft conversion - £32,400

Garage - £18,356

Single storey extension - £52,120

Outbuilding - £9,856

Install an RSJ - £2,056

Build a kitchen extension - £41,856

More extensions & conversions cost guides...

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