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FLEX CONSTRUCTION LIMITED
Joe
FLEX CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in Grays. We offer a competitive rate to complete all your exten...
"RSJ installation across a 5 metre section of rear wall." - CHAFFORD HUNDRED, job posted 28/07/25
The England Team
The England Team is an established extension buildering business in Grays. We come highly recommended and provide competitive quotes for your work....
"Loft conversion" - THURROCK, job posted 09/07/25
C & B Multi-Trader
C & B Multi-Trader is an established extension buildering business in Grays. We come highly recommended and provide competitive quotes for your wor...
"Doma Loft conversion" - THURROCK, job posted 10/02/25
CIA Construction Limited
Experienced extension builder ready to quote for your work. CIA Construction Limited is the best extension builder in Grays. No obligation free quo...
"Loft conversion" - THURROCK, job posted 12/10/24
Kaizer Berg Ltd
Kaizer Berg Ltd is an established and experienced local extension builder in Grays. Please contact us for a free, no obligation quote and competiti...
"Loft conversion" - THURROCK, job posted 12/05/24
PALMERS BUILDERS LIMITED
Grays, RM17
Trusted and professional extension builder in Grays. Experienced in all extension buildering work and keeping within budget and on quote. PALMERS B...
£39/hr
£242/day
Renewvate
Experienced extension builder ready to quote for your work. Renewvate is the best extension builder in Grays. No obligation free quotes and many ha...
£37/hr
£233/day
Access Builders Direct LTD
Grays, RM17
Trusted and professional extension builder in Grays. Experienced in all extension buildering work and keeping within budget and on quote. Access Bu...
£44/hr
£276/day
MCM Building Services Limited
Our building services company MCM Building Services Limited has been helping customers in Essex and the surrounding area by providing professional,...
£40/hr
£246/day
Deen Construction & Renovations Ltd
At Deen Construction & Renovations Ltd, we offer a one stop solution for a range of property Constructions & Renovation projects, Maintenance, Full...
£41/hr
£262/day
Deen Construction & Renovations Ltd
Experienced extension builder ready to quote for your work. Deen Construction & Renovations Ltd is the best extension builder in Grays. No obligati...
£37/hr
£233/day
HYDER CONSTRUCTION LTD
HYDER CONSTRUCTION LTD is a trusted extension builder serving customers in Grays and the surrounding area. Contact us to today to get a competitive...
Quickly find an Extension Builder in Grays
Use these steps to find Extension Builders in Grays for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in Grays. 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 Grays 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.
Build a timber frame extension - £26,080
Garden office - £10,080
Granny annexe - £87,080
Build a flat roof extension - £22,080
Convert a Garage - £16,080
Hip to gable loft conversion - £42,080
Convert a bungalow loft - £29,080
Build a dormer loft conversion - £42,080
Build a swimming pool - £81,080
Build a Mansard loft conversion - £52,080
Concrete foundations - £6,330
Underpin a building - £17,580
Two storey extension - £88,120
Convert a basement - £38,400
Side return extension - £42,400
Loft conversion - £34,500
Garage - £18,580
Single storey extension - £56,600
Outbuilding - £10,080
Install an RSJ - £2,280
Build a kitchen extension - £42,080
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