Find affordable W4 extension builders
- Local extension builders W4
- Job estimates from extension builders near you
- Local Extension Builders in London Boroughs
| Low | Average | High |
|---|---|---|
| £25 | £38 | £80 |
| Average hourly rate from 97 extension builders in W4 ex VAT or callout | ||
Average W4 extension builder hourly rate is £38
Range from the cheapest, mostly independent, £36 per hour and £229 per day (Starling Constructions Ltd) to the dearest, normally the best, £50 per hour and £350 per day (Adrian Design Ltd).
Comparing hourly and daily rates of extension builders gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Click 'Get quotes' and describe your job and we will send it to your local extension builders for FREE.
Local extension builders W4
Starling Constructions Ltd
London W4
£36/hour
£229/day
Starling Constructions Ltd is an established and experienced local extension builder in W4. Please contact us for a free, no obligation quote and competitive rates. Covering a 5 mile radius.
"UC beam install 2.5m only (calculations done, building control notification done, no pretty boxing etc.)"
ANNA, TW8
SxS Design & Build
£39/hour
£243/day
Extension Builder in Chiswick Greater London, W4. Working within a 5 mile radius.
Design, Project Manage & Build bespoke homes for clients
" Hi there, I'm reaching out regarding a live opportunity at Heathrow Airport for the design, manufacture, and installation of a pre-fabricated pedestrian bridge next to the Longford Link Bridge. The contract is valued between £150k–£250k and runs until Jan 2027. CAS accreditation is required. If..."
TENNYSON, W4
Kuta Design and Build Limited
Greater London W4
£39/hour
£243/day
Kuta Design and Build Limited is an established and experienced local extension builder in W4. Please contact us for a free, no obligation quote and competitive rates. Covering a 5 mile radius.
"Loft conversion"
W12
Arrow Design LTD
£36/hour
£230/day
Arrow Design LTD are extension builders in W4 who work within a 5 mile radius. Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of work in W4 and testimonials.
"Flat roof extension for a period mews terraced house. We'd like a bedroom extension with full bathroom and a roof top terrace. Footprint is roughly 8.5m x 6m."
JAMES, W6
ASSEGAI DESIGN&BUILD
Chiswick W4
£37/hour
£233/day
ASSEGAI DESIGN&BUILD are here to help customers who need an Extension Builder in W4. We offer a competitive rate to complete all your jobs to professional standards.
"Mansard loft conversion"
SHEPHERD'S BUSH
Elite London Construction
£37/hour
£230/day
Relax... you have found a reliable extension builder in W4. Elite London Construction is a friendly and reliable company based in W4 who consider no job as too big or too small. Qualified, professional extension builders with years of experience in the industry.
"Garage"
W3
Good Design and Build
London, Greater London W4
£37/hour
£230/day
Good Design and Build are here to help customers who need an Extension Builder in W4. We offer a competitive rate to complete all your jobs to professional standards.
"Side return extension"
SW13
Guardian Developments
£39/hour
£243/day
Extension Builder in Chiswick Londonderry, W4. Working within a 5 mile radius.
Guardian Developments is a west London based design and build company, specialising in residential projects including extensions, refurbishments and kitchen and bathroom installations.
"Basement conversion"
W4
Oak Sash Co
Chiswick W4
£37/hour
£236/day
Trusted and professional extension builder in W4. Experienced in all work and keeping within budget and on quote. Oak Sash Co have many happy customers in W4, testimonials available.
Zulufish
£37/hour
£230/day
Relax... you have found a reliable extension builder in W4. Zulufish is a friendly and reliable company based in W4 who consider no job as too big or too small. Qualified, professional extension builders with years of experience in the industry.
Smart Property Sourcing
Midlothian W4
£39/hour
£243/day
Extension Builder in W4, W4. Covering 5 mile radius.
Smart Property Sourcing is a trusted Extension Builder serving customers in W4 and the surrounding area. Contact us to today to get a competitive quote for work in W4. We offer value for money and quality to our customers, we pride ourselves on the positive feedback.
Pipedreams Interiors Ltd
£39/hour
£243/day
Pipedreams Interiors Ltd are here to help customers who need an Extension Builder in W4. We offer a competitive rate to complete all your jobs to professional standards.
Adrian Design Ltd
Chiswick W4
£50/hour
£350/day
Extension Builder in Chiswick, W4. Working within a 5 mile radius.
Adrian Design Ltd operates in west London for over 10years.
We are constantly developing our techniques of building, looking for better materials and ethical supplies, implementing newly available technology and improving our management...
R Burton & Sons Builders
£37/hour
£233/day
R Burton & Sons Builders are here to help customers who need an Extension Builder in W4. We offer a competitive rate to complete all your jobs to professional standards.
SW CHELSEA CONSTRUCTION
Greater London W4
£39/hour
£243/day
Extension Builder in Greater London, W4. Working within a 5 mile radius.
SW Chelsea was founded in 2009 specialising in refurbishment projects within both the residential and commercial sectors. Over the last ten years SW Chelsea have expanded into main contracting and now offer a full range of construction services f...
Thames Lofts
£37/hour
£236/day
Thames Lofts is an established and experienced local extension builder in W4. Please contact us for a free, no obligation quote and competitive rates. Covering a 5 mile radius.
Magill Travill Construction
Chiswick W4
£37/hour
£236/day
Extension Builder in W4, W4.
Need an Extension Builder in W4? Magill Travill Construction has been helping local clients (5 mile radius) with their jobs for many years. Get a quote today.
Knight Refurbishment House Renovation
£39/hour
£243/day
Extension Builder in Chiswick Greater London, W4. Working within a 5 mile radius.
When it comes to an expert house renovation and professional house refurbishment work in London, the company to trust with your project is Knight Refurbishment. We boast many years of invaluable industry experience, with a portfolio including high...
P and J Roofing & Building Contractors Ltd
£39/hour
£243/day
Extension Builder in W4, W3. Covering 5 mile radius.
P and J Roofing & Building Contractors Ltd is a trusted Extension Builder serving customers in W4 and the surrounding area. Contact us to today to get a competitive quote for work in W4. We offer value for money and quality to our customers, we pride ourselves on the positive feedback.
Specialist Screeding
£37/hour
£236/day
Specialist Screeding are extension builders in W4 who work within a 5 mile radius. Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of work in W4 and testimonials.
Quickly find an Extension Builder in W4
Use these steps to find Extension Builders in W4 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in W4. 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 W4 Extension Builders or phone them directly - you’re in control!
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
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
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.
Timber frame extension - £25,920
Garden office - £9,920
Granny annexe - £86,920
Flat roof extension - £21,920
Garage conversion - £15,920
Hip to gable loft conversion - £41,920
Bungalow loft conversion - £28,920
Dormer loft conversion - £41,920
Swimming pool - £80,920
Mansard loft conversion - £51,920
Concrete foundation - £6,170
Underpinning - £17,420
Two storey extension - £87,880
Basement conversion - £36,600
Side return extension - £40,600
Loft conversion - £33,000
Garage - £18,420
Single storey extension - £53,400
Outbuilding - £9,920
RSJ installation - £2,120
Kitchen extension - £41,920
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