Name: Extension Builder
Brand: HaMuch
SKU: extension-renovation
Rating: 5 (1 reviews)

Find affordable PO19 extension builders

Prices range from cheapest £29/hour and £212/day (G P H BUILDERS LTD) to £38/hour and £290/day (Ministry of the Interior) - average £34/hr and £238/day

HaMuch is Excellent

Local PO19 extension builders & latest jobs

"Convert a Garage" - PO20, job posted 18/09/26

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 PO19 extension builders rates

Compare PO19 extension builders rates (excluding VAT or callout charges)
Location in UK	Hourly Rate	Daily Rate
Extension Builders near Chichester	£34	£242
Extension Builders near Bognor Regis	£35	£247
Extension Builders near Arun	£35	£241
Extension Builders near Havant & Waterloo	£35	£248
Extension Builders near Havant	£35	£249
Extension Builders near Littlehampton	£35	£244
Extension Builders near Horndean	£35	£253
Extension Builders near Waterlooville	£36	£250
Extension Builders near Rustington	£36	£246
Extension Builders near Portsmouth	£36	£250

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 - £25,904

Garden office - £9,904

Granny annexe - £86,904

Build a flat roof extension - £21,904

Convert a Garage - £15,904

Hip to gable loft conversion - £41,904

Convert a bungalow loft - £28,904

Build a dormer loft conversion - £41,904

Build a swimming pool - £80,904

Build a Mansard loft conversion - £51,904

Concrete foundations - £6,154

Underpin a building - £17,404

Two storey extension - £87,856

Convert a basement - £36,420

Side return extension - £40,420

Loft conversion - £32,850

Garage - £18,404

Single storey extension - £53,080

Outbuilding - £9,904

Install an RSJ - £2,104

Build a kitchen extension - £41,904

More extensions & conversions cost guides...

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