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

Find affordable DA8 extension builders now

Extension builders rates in DA8 range from £30/hour £192/day (ABC DECORATORS) to £69/hour £291/day (Roger Matharoo). To see prices and availability now for your job click green button.

HaMuch is Excellent

How HaMuch saves you money

Post your job for free

We send your job to ALL DA8 extension builders

Compare quotes

Available extension builders in DA8 reply

Save Money

Select an affordable extension builder

Post your job

Sort by

"Loft conversion" - ERITH, job posted 09/08/25

Quickly find an Extension Builder in DA8

Use these steps to find Extension Builders in DA8 for FREE!

Post your job: Click "Get quotes" and briefly describe your job.
Enter your details: We’ll match you with Extension Builders in DA8. We’ll notify you via text or email when an Extension Builder is available to quote.
Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local DA8 Extension Builders or phone them directly - you’re in control!

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

Local Extension Builders in London Boroughs

Local Extension Builders in London Boroughs
Borough in London
Extension Builders in Crayford
Extension Builders in Belvedere
Extension Builders in Barnehurst
Extension Builders in Erith
Extension Builders in Bexleyheath
Extension Builders in Dartford
Extension Builders in Abbey Wood
Extension Builders in Bexley
Extension Builders in Welling
Extension Builders in Purfleet

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 - £26,056

Garden office - £10,056

Granny annexe - £87,056

Build a flat roof extension - £22,056

Convert a Garage - £16,056

Hip to gable loft conversion - £42,056

Convert a bungalow loft - £29,056

Build a dormer loft conversion - £42,056

Build a swimming pool - £81,056

Build a Mansard loft conversion - £52,056

Concrete foundations - £6,306

Underpin a building - £17,556

Two storey extension - £88,084

Convert a basement - £38,130

Side return extension - £42,130

Loft conversion - £34,275

Garage - £18,556

Single storey extension - £56,120

Outbuilding - £10,056

Install an RSJ - £2,256

Build a kitchen extension - £42,056

More extensions & conversions cost guides...

People in DA8 searching for a Extension Builder also viewed...

Painter and Decorator

The Largest Database of UK Trade Rates

At HaMuch we know what tradespeople charge because we have the largest database of rates anywhere in the UK. If you want quotes for jobs at the right price for you, post your jobs with HaMuch and get your home improvements kickstarted straight away!

Appliance Repair Specialist

Conservatory Specialist