From £87,328
Trusted and professional extension builder in Grays. Experienced in all extension buildering work and keeping within budget and on quote. PALMERS B...
From £86,936
Essex, RM17
Experienced extension builder ready to quote for your work. Renewvate is the best extension builder in Grays. No obligation free quotes and many ha...
From £87,096
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...
From £86,864
Grays, RM17
Trusted and professional extension builder in Grays. Experienced in all extension buildering work and keeping within budget and on quote. Access Bu...
From £87,208
Our building services company MCM Building Services Limited has been helping customers in Essex and the surrounding area by providing professional,...
From £87,392
The England Team is an established extension buildering business in Grays. We come highly recommended and provide competitive quotes for your work....
From £87,096
Experienced extension builder ready to quote for your work. Deen Construction & Renovations Ltd is the best extension builder in Grays. No obligati...
From £86,968
At Deen Construction & Renovations Ltd, we offer a one stop solution for a range of property Constructions & Renovation projects, Maintenance, Full...
From £86,968
Kaizer Berg Ltd is an established and experienced local extension builder in Grays. Please contact us for a free, no obligation quote and competiti...
From £87,376
C & B Multi-Trader is an established extension buildering business in Grays. We come highly recommended and provide competitive quotes for your wor...

Building a granny annexe ranges from £86,864 (Access Builders Direct LTD based in RM17) to £87,392 (The England Team based in RM16), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in Grays by posting a job with HaMuch. We will send it to extension builders in Grays who will be happy to help 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.

Underpin a building - £17,623

Two storey extension - £88,185

Build a timber frame extension - £26,123

Build a swimming pool - £81,123

Single storey extension - £57,464

Side return extension - £42,886

Install an RSJ - £2,323

Outbuilding - £10,123

Build a Mansard loft conversion - £52,123

Loft conversion - £34,905

Build a kitchen extension - £42,123

Hip to gable loft conversion - £42,123

Granny annexe - £87,123

Garden office - £10,123

Convert a Garage - £16,123

Garage - £18,623

Build a flat roof extension - £22,123

Build a dormer loft conversion - £42,123

Concrete foundations - £6,373

Convert a bungalow loft - £29,123

Convert a basement - £38,886